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National is a registered trademark of Federal Mogul Corp licensed for use by The Timken Company Redi Sleeves Redi Coat and Redi Seals are registered trademarks of Federal Mogul Corp Zero Duplication and V Seals are trademarks of Federal Mogul Corp Viton is a registered trademark of DuPont Corporation Timken is the registered trademark of The Timken Company www timken com 2005 The Timken Company Printed in USA 20M 04 05 07 Order No 7707 Timken is your resource for quick cost effective sealing solutions To learn more about how Timken can enhance your line of seals call Timken in the U S at 1 877 4 TIMKEN and in Canada at 1 800 565 4927 for English and 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals INDUSTRIAL SEALS CATALOG o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o National Industrial Seals Seals Catalog FC BC 4 1 05 4 36 PM Page 1 o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Timken offers an extensive line of sealing solutions for original equipment manufacturers and the aftermarket Our line of National industrial seals is made from innovativematerials and process solutions that enhancelife and performance in many industrial applications This line of industrial seals adds value to the company s portfolio of friction management solutions The seals are backed by the company s experienced technical support and distribution networks giving distributorsa single source for a wide range of bearings and value added extrasto help keep equipment running optimally Seals Catalog Inside B 4 1 05 4 50 PM Page 2 o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o National Industrial Seals Seals Catalog Inside B 4 1 05 4 50 PM Page 3 Sealing Solutions Custom Made Overnight Timken offers cost effective and quick sealing solutions that help reduce downtime and help keep equipment running smoothly Redi Seals help minimize downtime since they are available within 24 hours and in the right quantities even a single seal Through an innovative manufacturing process Redi Seals are produced without long lead times which offers distributors a more flexible and efficient way of doing business Timken offers 11 types of Redi Seals custom made to fit your design size application material and other specifications Redi Seals are unique high quality sealing devices that require specific information before manufacturing When ordering you will need to specify the following information Seal design or type Size ranging from 0 827 21mm shaft to 13 330mm housing bore Inch or metric size Seal applications industrial agricultural or vehicular Seal material Nitrile or Viton Special features including split seals Redi Seals o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Seals Catalog Inside B 4 1 05 4 50 PM Page 4 o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Redi Seal Specification Checklist Although Redi Seals are manufactured to the same exacting standards and specifications as the stock product lines exact dimensions are required before a seal can be made Please review the specifications manual before contacting Timken A Zero Duplication seal may already meet your sealing requirements 1 Choose a style NOTE SLO and DLO also are available in split designs 2 Measure the required dimensions to the nearest 0 001 or 0 05mm Shaft Diameter Bore Diameter Width 3 Select the appropriate seal material Nitrile 50 F to 250 F 45 C to 121 C Fluoroelastomer 40 F to 400 F 40 C to 205 C PTFE 650 F to 4500 F 55 C to 232 C R O D PTFE Type RTSL 65 F to 300 F 55 C to 150 C 4 Note any important application details Shaft Speed RPM Temp Range Lubricant Comments To order National industrial seals contact your Timken sales representative or call 1 877 4 TIMKEN in the U S In Canada call 1 800 565 4927 for English or 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals CAUTION Redi Seals are not recommended for the following applications Rear wheel bearing seals on rear wheel drive vehicles Power steering pump seals Stub shaft seals on front wheel drive vehicles Any nuclear applications Automatic transmission front pump seals Any aircraft aviation aerospace applications CUSTOM SEALS IN 24 HOURS Seals Catalog Inside B 4 1 05 4 50 PM Page 5 Redi Sleeves offered by Timken are precision stainless steel wear sleeves designed to be pressed onto a shaft to provide an enhanced sealing surface Redi Sleeves are fast inexpensive repair options for grooved or worn shafts Redi Sleeves are pressed onto a shaft where indications of seal wear such as tracks or grooves have developed Using a Redi Sleeve gives the shaft a smooth ideal sealing surface Fast Inexpensive Shaft Repairs Timken s line of Redi Sleeves are easy to install and feature a removable flange and an installation tool When using Redi Sleeves you receive Strong durable stainless steel construction that provides a corrosion free sealing surface Ultra thin construction that allows original seal size to be used with minimal additional lip loading Redi Sleeve sealing surfaces that are ground to a 10 20 microinch Ra 0 25 0 50 Micrometer Ra finish without lead Options for shafts from 0 5 12 7mm to 8 203mm diameters Redi Sleeve Size Selection Selecting the proper size Redi Sleeve is key to making sure equipment is up and running faster To select the correct size measure the shaft diameter where the sleeve will be positioned ahead of the wear path Do not measure the track worn by the old seal The shaft needs to be measured in three positions 12 o clock to 6 o clock 2 o clock to 8 o clock and 4 o clock to 10 o clock Average the three readings together to compensate for possible shaft out of round or error in measurement Use the averaged measurement to select a part number from the size chart provided To order National industrial seals contact your Timken sales representative or call 1 877 4 TIMKEN in the U S In Canada call 1 800 565 4927 for English or 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals Redi Sleeves REPAIR DAMAGED SHAFTS OR PROTECT NEW ONES o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Seals Catalog Inside B 4 1 05 4 50 PM Page 6 Shaft Repair Kits provided by Timken save time and costly shaft replacements These kits include the industry tested technician approved seal in addition to a Redi Sleeve To order National industrial seals contact your Timken sales representative or call 1 877 4 TIMKEN in the U S In Canada call 1 800 565 4927 for English or 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals Shaft Repair Kits o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Seals Catalog Inside B 4 1 05 4 50 PM Page 7 By consolidating your inventory into one systematic collection of premium quality seals the Zero Duplication program offered by Timken provides comprehensive coverage while minimizing the number of replacement seals you carry in inventory Zero Duplication is an effective way to do more with less This program features a special selection of oil seals that are designed to meet the requirements of applications with shaft diameters up to 12 or 300mm with zero duplication of comparable seals Improve Coverage and Reduce Inventory Each Zero Duplication seal offered by Timken effectively replaces several similar seals providing comprehensive application coverage with less inventory This line of seals incorporates the most effective performance features in a range of common sizes Design Features Spring loaded dual lip sealing element Uses two sealing lips one spring loaded tightly against the shaft to retain lubricants the other functioning as a contaminant excluder Double wall case Reduces deformation to the case during installation and forms a secure stable base for optimum sealing element performance Exclusive Redi Coat coating Seals minor bore defects to help ensure a tight leak proof seal Optional fluoroelastomer sealing element available in selected part numbers in addition to standard Nitrile seals Provides excellent high temperature capabilities good compatibility with a wide range of fluids and long life Seal designs may vary Not all features are used in all Zero Duplication seals Zero Duplication Program A seal keeps contaminants out and lubricants in to protect and extend bearing life Typical Zero Duplication seal design o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Keep lubricants and other critical fluids in water and other contaminants out Seals Catalog Inside B 4 1 05 4 50 PM Page 8 Trust Zero Duplication Seals for Optimal Performance Typically a seal is replaced by an identical seal Zero Duplication seals however offer performance equal and often superior to original seals Even if the width case design or sealing elements differ Zero Duplication seals can provide optimal performance The Zero Duplication program offers tangible advantages for your customers Faster more responsive customer service Optimal seals for a wide range of applications The right seals in stock Three Zero Duplication stocking plans have been developed to maximize coverage Gold up to 6 160mm shaft sizes seals used in heavy industry pulp and paper mills ore processing mining operations Silver up to 4 100mm shaft sizes seals used in general industry including heavy duty high horsepower motors Bronze up to 2 5 60mm shaft sizes seals used in light duty service including motion control equipment conveying operations We can also develop a customized Zero Duplication assortment based on an analysis of your present inventory Determining Zero Duplication Coverage Zero Duplication seals are available to fit shafts from 0 250 to 12 in diameter and bore sizes from 0 499 to 14 Metric Zero Duplication seals are available to fit shafts from 7mm to 300mm in diameter and bore sizes from 16mm to 340mm Any part number listed in the Industrial Seals catalog that is in bold face type is a Zero Duplication seal To order National industrial seals contact your Timken sales representative or call 1 877 4 TIMKEN in the U S In Canada call 1 800 565 4927 for English or 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals MORE EFFICIENT MORE PROFITABLE SEAL INVENTORY MANAGEMENT o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o Advantages of the Zero Duplication program Faster more responsive service Simple easy replacement seal selection Simplified ordering process Reduced acquisition costs Reduced storage costs and requirements Elimination of obsolete seals Zero Duplication part numbers are listed in bold faced type Seals Catalog Inside B 4 1 05 4 50 PM Page 9 Product Specification Section The Specification section contains complete product data for Timken s line of National industrial seals Size Listings for each style and type of seal or sleeve as well as Material and compound selection guide Compound compatibility chart Recommended operation conditions chart Installation instructions and Troubleshooting guidelines also are included The Specification section contains an introduction technical sections complete size listings numerical index metric listing and seal component design illustrations All numbers are listed by size sequence and by the part number sequence Example PART NUMBER If a part number is known and dimensional data is required consult the NUMERICAL LISTING DIMENSIONS If the dimensions of a seal are known and a part number is required consult the SIZE LISTINGfor specific information Interchange Guide The Interchange guide will assist in converting a competitor s part number to a corresponding seal Begin by finding the identical first character of the product number whether a letter or a numeral Part numbers beginning with a letter will be listed in alphabetic then numeric order All part numbers comprising numerals only will be listed in strict numeric order For instances in which a letter appears in the middle of a part number for example 7A2125 the part number with the letter will be listed before any part numbers with a numeral in the same sequential position Example 7A2125 71250 Part number 7A2125 will be listed before part number 71250 Using This Catalog o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o COMPLETE PRODUCT SELECTION DATA Seals Catalog Inside B 4 1 05 4 50 PM Page 10 I TECHNICAL SECTION TABLE OF CONTENTS SECTION 1 TECHNICAL Page Number A Oil Seal Design and Selection Types of Oil Seals II National Seal Part Numbering System II The Seal and Its Function III Oil Seal Nomenclature and Components IV Conversion Chart RPM to FPM IV National Oil Seal Design Description V VI B Sealing Element Compounds Materials and Compounds Available for Sealing Elements VII Compound Selection Chart VIII XIV C Sealing System Preparation and Seal Installation Storage and Handling of Oil Seals XV Shaft Requirements XVI Bore Requirements XVII Installation of Seals Procedures Guidelines and Tools XVIII D General Information Oil Seal Distress Analysis Trouble Shooting Checklist XIX Redi Sleeves Installation and Removal XX National Wear Sleeves Description Installation and Removal XXI V Seals Description Material Styles Dimensional Reference XXII Seal Design Chart XXIII XXIV SECTION 2 SIZE LISTING Kits 123 126 O Rings 282 284 Radial Shaft Seals 1 122 Redi Sleeve 130 133 Wear Sleeves 127 129 SECTION 3 NUMERICAL LISTING Kits 237 239 Radial Shaft Seals 134 200 Redi Sleeve 243 246 V Seals 247 250 Wear Sleeves 240 242 Industrial Metric Seals 200 236 Felt Seals 236 SECTION 4 METRIC LISTING Seals listed according to sizes and types 251 281 SECTION 5 INTERCHANGE GUIDE Alphabetical Listing 285 368 Numerical Listing 369 663 Abbreviations To Manufacturers 664 665 II SECTION 1 A TECHNICAL OIL SEAL DESIGN AND SELECTION OIL SEAL NOMENCLATURE AND COMPONENTS While industry has generally preferred the double lip or single lip spring loaded seals a wide variety of types and styles are produced to satisfy various application requirements To simplify the identification process of the oil seals a Type Illustration column has been included in the Size Numerical and Metric Listings of this catalog The Type Illustration number refers to the Oil Seal Illustration Chart Just find the number on the illustration chart and the configuration of the component can be identified The National Oil Seal Design Description is provided to illustrate seal types and to provide operating data and limita tions for typical applications Factors relative to oil seal design and selection are also reviewed After size application and seal requirements are determined the proper seal can be located in the Size Section Likewise when the National part number is known the size and type can be easily located in the Numerical Section NATIONAL SEAL PART NUMBERING SYSTEM The National Oil Seal Engineering Department assigns the part numbers for all general purpose and special purpose seals Each type and size combination manufactured is identified by an individual part number Three numbering systems are generally used to identify National Oil Seals 1 General Purpose Seals Five or six digit numbers The first one or two digits usually signify seal type or construc tion The last four digits refer to a specific assigned shaft and bore size combination but do not indicate seal size They are assigned in consecutive order as a new shaft bore combination is established It may be possible to interchange seals for which the first one or two digits are different but for which the following digits are the same Such an interchange determination should be based on whether alternative seal designs would meet the require ments of the specific application Letter suffixes to part numbers within this manual usually refer to the sealing lip compound used 2 A four digit number system is used for some seals and general purpose seal kits with primarily automotive applica tions The numbers have been assigned consecutively and do not relate to seal size 3 Preassigned blocks of numbers are used to identify certain groups of miscellaneous and special purpose seals 370000A Wheel End Seals 200000 to 200500 Triple Lip Designs 380000A PTFE Wheel End Seals 200600 to 200899 Triple Lip Designs External 39000 to 39999 PTFE Seals 200900 to 200999 Dual Lip Design 410000 to 499999 Plain Round 201000 to 205999 Wheel Seals 710000 to 799999 Misc Round Application 220000 to 230000 Automotive Metric 99000 Redi Sleeves 800000 V Seals J JV JX etc Wear Sleeves If an oil seal has a prefix and or suffix that is not included within this manual contact your regional Timken Representative for more specific information III TECHNICAL SECTION HOUSING SHAFT HOUSING SHAFT SECTION 1 A TECHNICAL OIL SEAL DESIGN AND SELECTION THE SEAL AND ITS FUNCTION Oil Seal Definition As products oil seals may be simply described as devices that close or sealthe spaces between stationary and moving components in mechanical equipment they prevent lubricant from escaping Oil seals often called grease fluid or dirt seals are the vital components of practically every type of machine and vehicle in operation These seals fulfill an exacting function they protect all types of precision constructed close fitting ball sleeve and roller bearings Oil Seal Function Oil seals are used wherever shafts rotate and bearings require lubrication In short a seal is a barrier with three basic functions 1 Retaining lubricants and liquids 2 Excluding contaminants 3 Seal or separate dissimilar fluids or gases Precision bearings rely on the oil seal to prevent lubricants from escaping the bearings or a specific area Components of machines rely on the oil seal to prevent abrasives corrosive moisture and other harmful contam inants from entering the mechanics of the machine Separation of fluids and gases may completely rely on the seal to prevent intermixture of two different mediums such as lubricating oil and water Oil Seal In Use In a typical application the oil seal is installed adjacent to a bearing sealing in or sealing out as necessary the various liquids gases or solids encountered by the particular mechanism Without an oil seal essential lubricant can escape through the bearing and harmful dirt and foreign matter can enter With a properly designed and fitted oil seal the space between the housing and shaft is securely closed or sealed Lubricant cannot escape harmful dirt and foreign matter cannot enter IV SECTION 1 A TECHNICAL OIL SEAL DESIGN AND SELECTION OIL SEAL NOMENCLATURE AND COMPONENTS MODERATE This table is carried out to the limits of the recommended speeds expressed in FPM feet per minute for seals of standard construction Sizes and speeds beyond this table require special analysis of all conditions related to the application For intermediate shaft sizes of RPM the standard procedure of interpolation will apply CONVERSION CHART RPM TO FPM Shaft Diameter is in inches SHAFT DIAMETER SHAFT SPEED RPM 100 300 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 6000 7000 8000 9000 10000 12000 14000 16000 18000 20000 1 2 13 39 65 131 196 262 327 393 458 524 589 654 785 916 1047 1178 1309 1571 1833 2094 2356 2618 3 4 20 59 98 196 295 393 491 589 687 785 884 982 1178 1374 1571 1767 1963 2356 2749 1 26 79 131 262 393 524 654 785 916 1047 1178 1309 1571 1833 2094 2356 2618 1 1 4 33 98 164 327 491 654 818 982 1145 1309 1473 1636 1963 2291 2618 2945 1 1 2 39 118 196 393 589 785 982 1178 1374 1571 1767 1963 2356 2749 1 3 4 46 137 229 458 687 916 1145 1374 1604 1833 2062 2291 2749 2 52 157 262 524 785 1047 1309 1571 1833 2094 2356 2618 2 1 2 65 196 327 654 982 1309 1636 1963 2291 2618 2945 3 79 236 393 785 1178 1571 1963 2356 2749 3 1 2 92 275 458 916 1374 1833 2291 2749 4 105 314 524 1047 1571 2094 2618 5 131 393 654 1309 1963 2618 6 157 471 785 1571 2356 7 183 550 916 1833 2749 8 209 628 1047 2094 9 236 707 1178 2356 10 262 785 1309 2618 SPEED RANGE SLOW HIGH The Society of Automotive Engineers SAE and the American Society of Testing Materials ASTM have developed and adapted a standard to identify component parts that make up an oil seal as well as terminology and basic lip seal designs OUTER CASE INSIDE FACE INNER CASE I D WIDTH FREE LIP DIAMETER AUXILIARY LIP DIAMETER SHAFT OUTSIDE FACE SEALING ELEMENT SPRING BORE O D HEEL TOE INNER CASE PRESS FIT SURFACE V TECHNICAL SECTION SECTION 1 A TECHNICAL OIL SEAL DESIGN AND SELECTION NATIONAL OIL SEAL DESIGN DESCRIPTION Shaft Speeds Type Description Representative Cross Sections Type Numbers Feet Per of Sealing Elements Minute Spring Loaded Design 5L 5S 33 35 45 48 51 54 3000 Single Lip 62 75 83 91 100 Spring Loaded Design 1L 1S 2L 2S 3L 21 25 30 3000 Multi Lip 32 40 41 43 47 52 56 57 59 61 66 68 69 70 71 72 74 76 78 79 86 87 88 90 92 93 94 96 99 Spring Loaded 64 65 3000 Convolute Design Springless Designs 4L 4S 24 29 31 34 44 201 2000 Single Lip For Grease Retention 203 204 205 230 271 272 Type 4L And Slow Speed Applications 273 277 278 279 283 290 1000 Springless Designs 49 97 98 274 276 280 281 2000 Multi Lip For Grease Retention 282 284 285 286 287 And Slow Speed Applications External Lip To Seal At Bore 8L 8S 26 36 46 200 200E 750 Slow Speed Applications Spring Loaded 7L 7S 3000 Dual Opposing Lips Separates 2 Fluids Dual Spring Loaded 9L 9S 3000 Same Direction Inner Lip Stems Lube Surges Utilized Oil Bath Seal Design 37 1 2 3 4 5 6 7 8 9 10 11 12 3000 H D Truck Trailer Hubs General Purpose D F P W 6500 PTFE Design VAMAC THE REGISTERED TRADEMARK OF E I DUPONT AFLAS IS A REGISTERED TRADEMARK OF 3M COMPANY VI Maximum Shaft Finish STBM Maximum Maximum Shaft Pressure Micro Inch Shaft Shaft to Bore Dynamic Runout PSI FPM Hardness Misalignment RPM DRO 7 1000 FPM 10 20 Above Rockwell C 45 015 ECC 800 RPM 025 TIR 800 RPM 5 2000 FPM 010 ECC 4200 RPM 020 TIR 2200 RPM 3 3000 FPM 015 TIR 4200 RPM 7 1000 FPM 10 20 Above Rockwell C 45 020 ECC 4200 RPM 060 TIR 4200 RPM 5 2000 FPM 3 3000 FPM Atmospheric 10 25 Above Rockwell C 45 005 ECC 005 TIR Atmospheric 10 25 Above Rockwell C 45 010 ECC 010 TIR 7 1000 FPM 10 20 Above Rockwell C 45 015 ECC 800 RPM 025 TIR 800 RPM 5 2000 FPM 010 ECC 4200 RPM 020 TIR 2200 RPM 3 3000 FPM 015 TIR 4200 RPM 2 2000 FPM 100 Max Above Rockwell C 45 010 ECC Max 015 TIR SECTION 1 A TECHNICAL OIL SEAL DESIGN AND SELECTION NATIONAL OIL SEAL DESIGN TYPE DESCRIPTION TECHNICAL SECTION VII The environments in which a seal will operate should be determined before selecting the sealing element or lip material Two of the most important factors in material selection are Lubricant Temperature and Type National Oil Seals offer a variety of sealing lip materials and compounds The temperature limitations and fluid lubricant compatibility for most compounds are shown within the Compound Selection Chart on the following pages National Seals are used in a wide range of applications The seal is part of a system and is dependent on proper shaft and bore operation to function correctly Runout lubrication shaft to bore misalignment shaft speed temperature and other factors vary greatly from one application to another and each may affect the seal s life In a perfect system these factors would be nominalized to achieve maximum life for all components To assist our customers in getting maximum performance from their sealing system we have provided recommendations below Operating a seal at one extreme condition will have a small effect on seal life However when a seal is operating at multiple extremes in the system it will have a much greater impact on performance Therefore we ask you to use the following recommendations as a guide to achiev ing the maximum performance from your seal Each material or compound has been assigned a specific letter code and is referenced in vari ous tables and listings throughout this manual SECTION 1 B TECHNICAL Sealing Element Compounds MATERIALS AND COMPOUNDS AVAILABLE FOR SEALING ELEMENTS Compound Code Advantages Disadvantages Limitations Range Substitute Code Felt F Adequate seal for heavy Poor performance at low shaft 65 F to 200 F Nitrile S lubricants Primarily a wiper speeds Inadequate when 48 C to 93 C Polyacrylic N seal excessive moisture is present Vamac E Flouroelastomer V Aflas A PTFE T Leather L Good dry running capabilities Poor heat resistance More 50 F to 200 F Nitrile S expensive than Nitrile 46 C to 93 C Polyacrylic N Vamac E Flouroelastomer V Aflas A PTFE T Urethane U Good lubricant and ozone resistance Undergoes substantial softening Dependent None Good abrasion resistance Durable above 250 F Poor resistance to upon exact less susceptible to damage during hot water or steam compound and installation than Silicone usage Nitrile S Low cost Good low temp capability Does not have excellent heat resistance 40 F to 225 F Polyacrylic N Low swell in hydrocarbon fluids Poor resistance to lubricants containing 40 C to 107 CVamac E sulphur or EP additives hydrocarbons Fluoroelastomer V oxygenate blends gasoline methanol Aflas A Poor ozone resistance PTFE T Polyacrylate N Resistance to EP lubricants Limited low temperature capability 20 F to 300 F Vamac E Higher heat capabilities than Nitrile Poor dry running capability 29 C to 49 C Fluoroelastomer V Low swell in hydrocarbon fluids Subject to attack in aqueous Aflas A media Higher cost than Nitrile PTFE T Ethylene E Higher he at capabilities than Nitrile High swell in hydrocarbon fluids 30 F to 325 F Fluoroelastomer V Acrylic or Polyacrylic Better low temp Limited capabilities to follow 34 C to 163 C Aflas A Vamac performance than Polyacrylic Goodeccentric shafts or perform in high PTFE T abrasion and dry running capability frequency applications Intermediate cost Silicone H Good dry heat resistance Excellent Easily damaged during installation 80 F to 350 F Fluoroelastomer V low temperature capability Poor chemical resistance to certain 62 C to 176 C Aflas A EP additives and oxidized oil High PTFE T swell poor dry running performance Higher cost than Nitrile Fluoro V Excellent high temperature Poor resistance to basic 40 F to 400 F Aflas A Elastomer capabilities Compatible with wide high ph 7 fluids Attack by high 40 C to 204 C PTFE T range of fluids Very long life performance gear lubes Expensive relative to other materials Tetrafluoro A Better chemical resistance to all Poor chemicl resistance to 30 F to 400 F PTFE T Ethylene hydrocarbon fluids acids bases andhydrocarbon oxygenate blends 34 C to 204 C Propylene oxidizing agents than Fluoroelastomers gasoline methanol Poor low Aflas Capable of performing in the completetemperature capabilities More r ange of hydraulic fluids Continuousexpensive than Fluoroelastomers heat resistance over 400 F Fair dry abrasion and radiation resistance PTFE T Excellent dry running capabilities Low Poor abrasion resistance to dirty 100 F to 450 F None coefficient of friction Excellent environments High thermal 73 C to 232 C chemical resistance Resistant to expansion Susceptible to hydrocarbon oxygenate blends damage during iinstallation VAMAC THE REGISTERED TRADEMARK OF E I DUPONT AFLAS IS A REGISTERED TRADEMARK OF 3M COMPANY VIII SECTION 1 B TECHNICAL SEALING ELEMENT COMPOUNDS Compound Selection Chart SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Durometer 60 80 70 75 70 90 80 90 75 85 75 95 Oil Resistance Very Good Fair Good Fair Excellent Excellent Abrasion Resistance Excellent Fair Good Poor Good Good Max Service Temp 225 F 300 F 325 F 350 F 400 F 400 F Min Service Temp 40 F 20 F 30 F 80 F 40 F 30 F Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Acetaldehyde 4 4 3 2 4 4 Acetamide 1 4 1 2 2 1 Acetic Acid Glacial 3 4 4 2 3 4 Acetic Acid 30 2 4 3 1 2 4 Acetic Anhydried 3 4 3 3 4 4 Acetone 4 4 4 3 4 4 Acetophenone 4 4 4 4 4 4 Acetyl Chloride 4 4 4 3 1 1 Acetylene 1 4 4 2 1 1 Acrylonitrile 4 4 4 4 3 2 Adipic Acid 1 2 2 1 Aero Shell 17 Grease 1 2 4 1 1 Aero Shell 750 2 2 4 1 1 Aero Shell 7 A Grease 1 2 2 1 1 Aero Shell IAC 1 1 1 Alkazene Dibromoethylbenzene 4 4 4 4 2 2 Alum NH 3 Cr K aq 1 4 4 1 4 2 Aluminum Acetate aq 2 4 4 4 4 3 Aluminum Chloride aq 1 1 1 2 1 1 Aluminum Floride aq 1 2 1 1 Aluminum Nitrate aq 1 2 1 1 Aluminum Phosphate aq 1 1 1 1 Aluminum Sulfate aq 1 4 1 1 1 1 Ammonia Anhydrous 2 4 4 3 4 1 Ammonia Gas Cold 1 4 4 1 4 1 Ammonia Gas Hot 4 4 4 1 4 1 Ammonium Carbonate aq 4 4 4 1 Ammonium Chloride aq 1 1 1 1 Ammonium Hydroxide conc 4 4 4 1 2 1 Ammonium Nitrate aq 1 2 2 1 Ammonium Nitrite aq 1 2 1 Ammonium Persulfate aq 4 4 1 Ammonium Phosphate aq 1 1 1 Ammonium Sulfate aq 1 4 1 4 1 Amyl Acetate Banana Oil 4 4 4 4 4 4 Amyl Alcohol 2 4 4 4 2 3 Amyl Borate 1 1 1 Amyl Chloronapthalene 4 4 4 4 1 2 Amyl Naphthalene 4 2 3 4 1 1 Aniline 4 4 4 4 3 1 Aniline Dyes 4 4 4 4 1 Aniline Hydrochloride 4 4 4 3 2 2 ANILINE OILS 2 4 2 4 2 1 Animal Fats 2 1 4 2 1 1 Ansul Ether Anesthetics 1 4 1 4 4 4 API GL 5 3 1 4 4 1 1 Aqua Regina 4 4 4 4 2 2 Aroclor 1248 3 4 4 2 1 1 Aroclor 1254 4 4 4 3 1 1 Elastomer S N E H V A Aroclor 1260 1 4 4 2 1 1 Arsenic Acid 1 3 4 1 1 1 Arsenic Trichloride aq 1 Askarel 2 4 4 4 1 1 Asphalt 2 2 4 1 1 ASTM Method D 471 1 1 1 1 3 1 1 2 1 1 2 3 1 1 3 1 1 3 3 1 2 ASTM 4 Method D 471 2 4 1 ASTM Ref Fuel A MIL 2 3136B Type 1 1 2 2 4 1 2 ASTM Ref Fuel B MIL S 3136B Type 3 1 2 4 1 2 ASTM Reference Fuel C 2 4 3 4 1 2 ATF Type Mercon 1 1 2 2 1 1 ATF Type A 1 1 2 2 1 1 ATF Type F 1 1 2 2 1 1 ATF Type I 1 1 2 2 1 1 ATF Type II 1 1 2 2 1 1 Automotive Brake Fluid 4 4 4 4 4 Banana Oil Amyl Acetate 4 4 4 4 4 4 Barium Chloride aq 1 1 2 1 1 1 Barium Hydroxide aq 1 4 2 1 1 1 Barium Sulfate aq 1 4 2 1 1 1 Barium Sulfide aq 1 4 2 1 1 1 Beer 1 4 1 1 1 1 Beet Sugar Liquors 1 4 2 1 1 1 Benzaldehyde 4 4 4 2 4 4 Benzene 4 4 4 4 1 2 Benzene Sulfonic Acid 4 4 4 4 1 1 Benzine Ligroin Nirtobenzine Pet Ether 1 1 4 1 1 Benzoic Acic 3 3 2 3 1 1 Benzoyl Chloride 4 4 4 1 1 Benzyl Alcohol 4 4 4 2 1 2 Benzyl Benzoate 4 4 4 1 1 Benzyl Chloride 4 4 4 4 1 1 Biphenyl Diphenyl Phenylbenzene 4 4 4 4 1 1 Blast Furnace Gas 4 4 4 1 1 1 Bleach Solutions 4 4 4 2 1 1 Borax 2 2 1 2 1 1 Bordeaux Mixture 2 4 4 2 1 1 Boric Acid 1 4 1 1 1 1 Brake Fluid Non Petroleum 4 4 4 4 4 Brake Fluid Wagner 21B 3 4 3 4 3 Brine 1 4 3 1 1 1 Bromine Anhydrous 4 4 4 4 1 1 Bromine Triflouride 4 4 4 4 4 2 Bromine Water 4 4 4 4 1 1 Bromobenzene 4 4 4 4 1 1 Bunker Oil 1 1 2 2 1 1 IX TECHNICAL SECTION SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Butadiene 4 4 4 4 1 1 Butane 1 1 2 4 1 1 Butter Animal Fat 1 1 1 2 1 1 Butyl Acetate 4 4 4 4 4 4 Butyl Acetyl Ricinoleate 3 1 Butyl Acrylate 4 4 4 4 4 Butyl Alcohol 1 4 1 2 1 1 Butyl Amine 3 4 4 4 4 2 Butyl Benzoate 4 4 4 1 1 Butyl Carbitol 4 4 4 4 1 4 Butyl Cellosolve 3 4 4 4 4 Butyl Oleate 4 2 1 1 Butyl Stearate 2 1 1 1 Butylene 2 4 1 4 1 1 Butyraldehyde 4 4 4 4 4 2 Calcium Acetate aq 2 4 4 4 4 3 Calcium Bisulfite aq 4 4 2 1 1 1 Calcium Carbonate 1 1 1 1 1 Calcium Chloride aq 1 1 1 1 1 1 Calcium Hydroxide aq 1 4 2 1 1 1 Calcium Hypochlorite aq 2 4 2 2 1 1 Calcium Nitrate aq 1 1 1 2 1 1 Calcium Phosphate 1 1 1 1 1 Calcium Salts 1 1 1 Calcium Sulfide aq 1 4 4 2 1 1 Cane Sugar Liquors 1 4 1 1 1 1 Carbamate 3 4 4 1 1 Carbitol 2 4 3 2 2 4 Carbolic Acid Phenol 4 4 4 4 1 1 Carbon Bisulfide 3 3 4 4 1 1 Carbon Dioxide 1 1 2 1 1 Carbonic Acid 2 1 1 1 1 1 Carbon Monoxide 1 1 1 1 1 Carbon Tetrachloride 3 4 4 4 1 4 Castor Oil 1 1 2 1 1 1 Cellosolve 4 4 4 4 3 4 Cellosolve Acetate 4 4 4 4 4 4 Cellulube Fryquel 4 4 4 1 1 1 China Wood Oil Tung Oil 1 2 4 1 1 Chlorine Dry 4 4 4 4 1 1 Chlorine Wet 4 4 4 4 1 1 Chlorine Dioxide 4 4 4 1 1 Chlorine Trifluoride 4 4 4 4 4 4 Chloroacetic Acid 4 4 4 4 4 Chloroacetone 4 4 4 4 4 4 Chlorobenzene 4 4 4 4 1 1 Chlorobromomethane 4 4 4 4 1 1 Chlorobutadiene 4 4 4 4 1 1 Chlorododecane 4 4 4 4 1 1 Chloroform 4 4 4 4 1 4 O Chloronaphthalene 4 4 4 4 1 1 1 Chloro 1 Nitro Ethane 4 4 4 4 4 2 Chlorosulfonic Acid 4 4 4 4 4 2 Chlorotoluene 4 4 4 4 1 2 Chlorox Sodium Hypochlorite NaOC1 2 4 4 2 1 1 Chrome Plating Solutions 4 4 4 2 1 1 Chromic Acid 4 4 4 3 1 1 Citric Acid 1 1 1 1 1 Coal Tar Creosote 1 1 4 1 1 Cobalt Chloride aq 1 4 4 2 1 1 Elastomer S N E H V A Cocoanut Oil 1 1 1 1 1 1 Cod Liver Oil 1 1 2 2 1 1 Coke Oven Gas 4 4 3 2 1 1 Copper Acetate aq 2 4 4 4 4 4 Copper Chloride aq 1 1 1 1 1 1 Copper Cyanide aq 1 1 2 1 1 1 Copper Sulfate aq 1 4 1 1 1 1 Corn Oil 1 1 1 1 1 1 Cottonseed Oil 1 1 1 1 1 1 Creosote Coal Tar 1 1 4 4 1 1 Cresol 4 4 4 4 1 1 Cresylic Acid 4 4 4 4 1 1 Crude Oil 2 2 4 1 1 Cumene 4 4 4 4 1 1 Cutting Oil 1 2 4 1 1 Cyclohexane 1 1 3 4 1 2 Cyclohexanol 3 1 4 1 2 Cyclohexanone 4 4 4 4 4 2 P Cymene 4 4 4 4 1 1 DC44M Hi Temp Silicone Grease 3 3 3 3 1 1 Decaline 4 4 1 1 Decane 1 1 2 2 1 2 Delco Brake Fluid 4 4 4 4 4 Denatured Alcohol 1 4 3 1 1 1 Detergent Solutions 1 4 1 1 1 1 Developing Fluids 1 2 1 1 1 Dextron 1 2 4 1 1 Diacetone 4 4 4 4 4 4 Diacetone Alcohol 4 4 4 2 4 4 Dibenzyl Ether 4 4 4 4 Dibenzyl Sebecate 4 4 4 3 2 2 Dibromoethylbenzene Alkazene 4 4 4 4 2 2 Dibutyl Amine 4 4 4 3 4 1 Dibutyl Ether 4 3 4 4 3 2 Dibutyl Phthalate 4 4 4 2 3 1 Dibutyl Sebecate 4 4 4 2 2 1 O Dichlorobenzene 4 4 4 4 1 1 Dichloro Isopropyl Ether 4 3 4 4 3 4 Dicyclohexylamine 3 4 4 1 Diesel Oil 1 1 1 4 1 2 Di Ester Lubricant MIL L 7808 2 4 4 1 2 or 3 Di Ester Synthetic Lubricant 2 4 4 1 2 or 3 Diethylamine 2 4 4 2 4 1 Diethyl Benzene 4 4 1 1 Diethyl Ether 4 3 4 4 4 4 Diethylene Glycol 1 2 1 2 1 1 Diethyl Sebecate 2 4 4 2 2 1 Diisobutylene 2 4 4 4 1 1 Diisopropyl Benzene 4 1 1 Diisopropyl Ketone 4 4 4 4 4 4 Diisopropylidene Acetone Phorone 4 4 4 4 4 4 Dimethyl Aniline Xylidine 3 4 4 4 4 2 Diethyl Ether Methyl Ether Monomethyl Ether 1 4 4 1 1 3 Dimethyl Formamide 2 4 3 2 4 4 Dimethyl Phthalate 4 4 4 2 1 Dinitrotoluene 4 4 4 4 4 4 Dioctyl Phthalate 3 4 4 3 2 1 X SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Dioctyl Sebecate 4 4 4 3 2 1 Dioxane 4 4 4 4 4 4 Dioxalane 4 4 4 4 4 4 Dipentene 2 4 4 4 1 1 Diphenyl Biphenyl Phenylbenzene 4 4 4 4 1 1 Diphenyl Oxides 4 4 4 3 1 1 Dowtherm Oil 4 4 2 3 1 1 Drink Water See Note Re Water 1 1 1 1 1 Dry Cleaning Fluids 3 4 3 4 1 2 Elco 28 EP Lubricant 1 1 4 1 1 Engine Oil Diester Motor Oil 2 1 2 1 1 1 Engine Oil Hydrocarbon Motor Oil 1 1 1 1 1 1 Epichlorohydrin 4 4 4 4 4 4 EP Lubes 2 1 2 4 1 1 ESSO GX 80W90 GL 5 2 1 2 4 1 1 ESSO Motor Oil 1 1 4 1 1 ESSO Transmission Fluid TYPE A 1 2 4 1 1 ESSO XP90 EP Lubricant 1 2 4 1 1 Ethane 1 1 2 4 1 1 Ethanol Ethyl Alcohol 1 4 3 1 3 2 Ethanolamine 2 4 4 2 4 1 Ethyl Acetate 4 4 4 2 4 4 Ethyl Acetoacetate 4 4 4 2 4 4 Ethyl Acrylate 4 4 4 2 4 2 Ethyl Alcohol 1 4 3 1 3 1 Ethyl Benzene 4 4 4 4 1 2 Ethyl Benzoate 4 4 3 4 1 2 Ethyl Cellosolve 4 4 4 4 4 4 Ethyl Cellulose 2 4 3 3 4 1 Ethyl Chloride 1 4 4 4 1 1 Ethyl Chlorocarbonate 4 4 4 4 1 1 Ethyl Chloroformate 4 4 4 4 4 4 Ethyl Ether 3 4 4 4 4 4 Ethyl Formate 4 4 1 4 Ethyl Mercapton 4 4 3 2 1 Ethyl Oxalate 4 4 4 4 1 1 Ethyl Pentachlorobenzene 4 4 4 4 1 1 Ethyl Silicate 1 1 1 Ethylene 1 4 1 1 Ethylene Chloride 4 4 4 4 2 1 Ethylene Chlorohydrin 4 4 4 2 1 2 Ethylene Diamine 1 4 4 1 4 1 Ethylene Dichloride 4 4 4 4 1 1 Ethylene Glycol 1 3 1 1 1 1 Ethylene Oxide 4 4 4 4 4 4 Ethylene Trichloride 4 4 4 4 1 1 Fatty Acids 2 1 3 1 1 Ferric Chloride aq 1 1 2 2 1 1 Ferric Nitrate aq 1 1 2 3 1 1 Ferric Sulfate aq 1 1 2 2 1 1 Fish Oil 1 1 1 1 Fluorinated Cyclic Ethers 4 4 Fluorine Liquid 4 4 4 2 2 Fluorobenzene 4 4 4 4 1 1 Fluoroboric Acid 1 1 Fluorocarbon Oils 4 3 Elastomer S N E H V A Fluorolube 1 4 1 2 2 Fluorosilicic Acid Hydrofluosilicic Acid 1 2 4 1 1 Formaldehyde RT 3 4 4 2 4 3 Formic Acid 2 2 2 3 2 Freon 11 2 3 4 1 4 Freon 12 1 1 3 4 2 4 Freon 13 1 3 4 1 4 Freon 21 4 3 4 4 4 Freon 22 4 2 4 4 4 4 Freon 31 4 3 4 4 Freon 32 1 3 4 4 Freon 112 3 3 4 1 4 Freon 113 1 3 4 2 4 Freon 114 1 3 4 2 4 Freon 115 1 3 1 4 Freon 134A 4 4 2 4 4 4 Freon 142b 1 3 4 4 Freon 152a 1 3 4 4 Freon 218 1 3 1 4 Freon C316 1 3 4 Freon C318 1 3 2 4 Freon 1381 1 3 4 1 4 Freon 114B2 2 3 4 2 4 Freon 502 2 3 2 4 Freon TF 1 3 4 2 4 Freon T WD602 2 3 4 1 4 Freon TMC 2 3 3 1 4 Freon T P35 1 3 1 1 4 Freon TA 1 3 3 3 4 Freon TC 1 3 4 1 4 Freon MF 1 3 4 2 4 Freon BF 2 3 4 1 4 Fuel Oil 1 1 1 4 1 1 Fumaric Acid 1 4 2 1 1 Furan Furfuran 4 4 4 4 Furfural 4 4 4 4 4 4 Fyrquel Cellulube 4 4 1 1 1 Gallic Acid 2 4 4 1 1 Gasohol 10 Ethanol 2 4 4 4 1 2 Ormethanol Gasoline Lead And No lead 2 4 3 4 3 2 Gasoline 2 4 2 4 1 1 Gelatin 1 4 1 1 1 1 Glauber s Salt aq 4 4 1 1 1 Glucose 1 1 1 1 1 Glue 1 1 1 1 1 Glycerine 1 3 1 1 1 1 Glycols 1 4 1 1 1 1 Grease 1 2 2 1 1 1 Green Sulfate Liquor 2 2 1 1 1 1 Gulf High Temperature Grease 1 1 4 1 1 Halowax Oil 4 4 1 1 N Hexaldehyde 4 2 2 4 3 Hexane 1 1 1 4 1 2 N Hexene 1 2 1 1 4 1 1 Hexyl Alcohol 1 4 1 2 1 1 High Viscosity Lubricant H2 1 1 1 1 1 High Viscosity Lubricant U4 1 1 1 1 1 Hydrazine 2 3 4 3 Hydraulic Oil Petroleum 1 1 1 3 1 1 Hydrobromic Acid 4 4 2 4 1 1 XI TECHNICAL SECTION SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Hydrobromic Acid 40 4 4 4 4 1 1 Hydrochloric Acid Cold 37 3 4 4 3 1 1 Hydrochloric Acid Hot 37 4 4 4 4 2 1 Hydrocyanic Acid 2 4 3 1 1 Hydrofluoric Acid Con Cold 4 4 4 4 1 1 Hydrofluoric Acid Conc Hot 4 4 4 4 3 1 Hydrofluoric Acid Anhydrous 4 4 4 4 4 1 Hydrofluosilicic Acid Fluosilicic Acid 1 4 1 1 Hydrogen Gas 1 2 1 3 1 1 Hydrogren Peroxide 90 4 4 4 2 2 1 Hydrogen Sulfide Wet Cold 4 4 4 3 4 1 Hydrogen Sulfide Wet Hot 4 4 4 3 4 1 Hydroquinone 3 4 2 2 Hyjet 4 4 4 3 Hyjet III 4 4 4 3 Hyjet S 4 4 4 3 Hyjet W 4 4 4 3 Hypochlorous Acid 4 4 4 1 1 Iodine Pentafluoride 4 4 4 4 4 Iodoform Isobutyl Alcohol 2 4 1 1 1 1 Isooctane 1 1 1 4 1 2 Isophorone 4 4 4 4 4 4 Isopropyl Acetate 4 4 4 4 4 4 Isopropyl Alcohol 2 4 1 1 1 1 Isopropyl Chloride 4 4 4 4 1 1 Isopropyl Ether 2 3 4 4 4 4 Kerosene 1 1 3 4 1 1 Lacquers 4 4 4 4 4 3 Lacquer Solvents 4 4 4 4 4 4 Lactic Acid Cold 1 4 3 1 1 1 Lactic Acid Hot 4 4 3 2 1 1 Lard 1 1 1 2 1 1 Lavender Oil 2 2 2 4 1 1 Lead Acetate aq 2 4 4 4 4 4 Lead Nitrate aq 1 4 2 1 Lead Sulfamate aq 2 4 4 2 1 1 Legroin Benzine Nitrobenzine Pet Ether 1 1 4 4 1 2 Lime Bleach 1 4 4 2 1 1 Lime Sulfur 4 4 4 1 1 1 Lindol Hydraulic Fluid 4 4 4 3 2 1 Linoleic Acid 2 3 2 2 1 Linseed Oil 1 1 1 1 1 1 Liquified Petroleum Gas 1 3 1 3 1 1 Lubricating Oils Petroleum 1 1 1 4 1 1 Lye 2 4 4 2 2 1 Magnesium Chloride aq 1 1 1 1 1 Magnesium Hydroxide aq 2 4 1 1 1 Magnesium Sulfate aq 1 4 1 1 1 1 Maleic Acid 4 4 1 1 1 Maleic Anhydride 4 4 4 1 Malic Acid 1 4 3 2 1 1 Mek MMehtyl Ethyl Ketone 4 4 4 4 4 4 Mercury Chloride aq 1 1 1 Mercury 1 1 1 1 Mesityl Oxide 4 4 4 4 Elastomer S N E H V A Methane 1 1 1 4 2 1 Methanol Methyl Alcohol 1 4 1 1 4 2 Methyl Acetate 4 4 4 4 4 4 Methyl Acrylate 4 4 4 4 4 4 Methylacrylic Acid 4 4 4 4 4 1 Methyl Alcohol 1 2 1 1 4 1 Methyl Bromide 2 3 1 1 Methyl Butyl Ketone Propyl Acetone 4 4 4 3 4 4 Methyl Cellosolve 3 4 4 4 4 1 Methyl Chloride 4 4 4 4 2 1 Methyl Cyclopentane 4 4 4 4 2 1 Methylene Chloride 4 4 4 4 2 2 Methyl Ether Dimethyl Ether Monomethyl Ether 4 4 4 4 2 2 Methyl Ethyl Ketone 4 4 4 4 4 4 Methyl Formate 4 4 Methyl Isobutyl Ketone 4 4 4 4 4 4 Methyl Methacrylate 4 4 4 4 4 3 Methyl Oleate 4 2 1 Methyl Salicylate 4 1 Milk 1 4 1 1 1 1 Mineral Oil 1 1 1 2 1 1 Monochlorobenzene 4 4 4 4 1 2 Monomethyl Aniline 4 4 4 2 1 Monoethanol Amine 4 4 4 2 4 4 Monomethyl Ether Methyl Ether Dimethyl Ether 1 4 1 1 1 3 Monovinyl Acetylene 1 2 1 1 Mustard Gas 1 1 MIL L 644 B 1 2 2 3 MIL L 2104 B 1 1 1 3 1 1 MIL L 2105 B 1 1 1 3 1 1 MIL G 2108 1 1 1 3 1 1 MIL S 3136 B Type 1 1 2 2 4 1 2 MIL S 3136 B Type II 1 4 1 2 MIL S 3136 B Type III 1 4 4 1 2 MIL S 3136 B Type IV 1 1 1 3 1 2 MIL S 3136 B Type V 1 1 1 3 1 2 MIL S 3136 B Type VI 1 1 1 3 1 2 MIL S 3136 B Type VII 1 4 1 2 MIL L 3150 A 1 1 1 3 1 2 MIL L 3503 1 1 1 3 1 2 MIL L 3545 B 2 2 2 4 1 2 MIL C 4339 C 1 1 1 3 1 2 MIL G 4343 B 2 1 4 1 1 MIL L 5020 A 1 2 2 4 1 2 MIL J 5161 F 1 2 4 1 2 MIL C 5545 A 2 2 4 1 2 MIL H 5559 A 1 3 2 2 2 1 MIL F 5566 1 2 1 1 1 MIL F 5602 1 1 3 3 1 2 MIL H 5606 B Red Oil 1 1 2 4 1 MIL J 5624 G JP 3 JP 4 JP 5 123 412 MIL O 6081 C 1 1 2 3 1 2 MIL L 6082 C 1 1 2 3 1 2 MIL H 6083 C 1 1 2 3 1 2 MIL L 6085 A 1 3 4 3 1 2 MIL L 6086 B 1 1 2 3 1 2 MIL L 6387 A 1 3 1 2 MIL C 6529 C 2 2 3 4 1 2 MIL F 7024 A 1 2 3 4 1 2 MIL H 7083 A 1 3 2 2 2 1 XII SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A MIL G 7118 A 1 3 4 3 1 2 MIL G 7187 1 1 2 3 1 2 MIL G 7421 A 1 3 1 2 MIL H 7644 2 2 3 4 1 1 MIL L 7645 2 2 3 4 1 2 MIL G 7711 A 1 1 2 3 1 2 MIL L 7808 F 1 3 4 3 1 2 MIL L 7870 A 1 1 2 3 1 3 MIL C 8188 C 1 3 3 3 1 3 MIL A 8243 B 1 3 2 2 2 1 MIL L 8383 B 1 1 2 3 1 2 MIL H 8446 B MLO 8515 2 3 4 4 1 2 MIL 1 8660 B 1 4 1 1 MIL L 9000 F 1 2 3 4 1 2 MIL T 9188 B 4 4 4 4 4 2 MIL L 9236 B 1 3 3 4 1 3 MIL L 10295 A 1 1 2 3 1 2 MIL L 10324 A 1 1 2 3 1 2 MIL G 10924 B 1 1 1 3 1 2 MIL L 11734 B 1 3 2 3 1 2 MIL O 11773 1 3 3 3 1 2 MIL P 12098 2 2 2 4 1 1 MIL H 13862 1 1 1 3 1 2 MIL H 13866 A 1 1 1 3 1 2 MIL H 13910 B 2 2 2 4 1 1 MIL H 13919 A 1 1 1 3 1 2 MIL L 14107 B 3 1 4 1 2 MIL L 15017 1 1 1 3 1 2 MIL L 15018 B 1 1 1 3 1 2 MIL L 15019 C 1 1 1 3 1 2 MIL L 15719 A 2 2 2 4 1 1 MIL G 15793 1 3 3 3 1 2 MIL F 16929 A 1 3 4 3 1 2 MIL L 16958 A 1 1 1 3 1 2 MIL F 17111 1 1 1 3 1 2 MIL L 17331 D 1 1 1 3 1 2 MIL L 17353 A 1 3 1 2 MIL L 17672 B 1 1 1 3 1 2 MIL L 18486 A 1 1 1 3 1 2 MIL G 18709A 1 1 1 3 1 2 MIL H 19457 B 4 4 4 4 4 3 MIL F 19605 1 4 1 2 MIL L 19701 1 3 3 3 1 2 MIL L 21260 1 1 1 3 1 2 MIL S 21568 A 1 1 1 4 1 1 MIL H 22072 1 3 2 2 2 2 MIL L 22396 1 1 1 3 1 2 MIL L 23699 A 1 3 2 3 1 2 MIL G 23827 A 1 3 2 3 1 2 MIL G 25013 1 2 2 4 1 2 MIL F 25172 1 4 1 2 MIL L 25336 B 1 3 3 3 1 2 MIL F 25524 A 1 1 4 1 2 MIL G 25537 A 1 1 1 3 1 2 MIL F 25558 B RJ 1 1 1 1 3 1 1 MIL F 25576 C RP 1 1 1 1 4 1 1 MIL H 25598 1 1 1 3 1 2 MIL F 25656 B 1 4 1 1 MIL L 25681 C 1 2 2 4 1 1 MIL G 25760 A 1 3 3 4 1 2 MIL G 25968 1 3 3 3 1 2 MIL L 26087 A 1 1 2 3 1 2 MIL G 27343 1 4 1 1 MIL H 27601 A 2 2 2 4 1 2 MIL G 27617 4 4 1 1 Elastomer S N E H V A MIL I 27686 D 1 3 2 2 2 2 MIL L 27694 A 1 4 1 1 MIL L 46000 A 1 3 3 3 1 2 MIL H 46001 A 1 1 1 3 1 2 MIL L 46002 1 3 1 2 MIL H 46004 1 1 1 3 1 2 MIL P 46046 A 2 2 2 4 1 1 MIL H 81019 B 1 1 1 3 1 2 MIL S 81087 1 4 1 1 Naphtha 2 2 4 4 1 1 Naphthalene 4 4 4 1 1 Naphthalenic Acid 2 4 1 1 Natural Gas 1 2 4 1 1 1 Neats Foot Oil 1 1 4 2 1 1 Neville Acid 4 4 4 4 1 1 Nickel Acetate aq 2 4 4 4 4 4 Nickel Chloride aq 1 3 4 1 1 1 Nickel Sulfate aq 1 4 4 1 1 1 Niter Cake 1 4 4 1 1 1 Nitric Acid Con 4 4 4 4 3 2 Nitric Acid Dilute 4 4 4 2 1 2 Nitric Acid Red Fuming 4 4 4 4 4 2 Nitrobenzene 4 4 4 4 2 1 Nitrobenzene Petroleum Ether 1 1 4 4 1 1 Nitroethane 4 4 4 4 4 1 Nitrogen 1 1 1 1 1 1 Nitrogen Tetroxide 4 4 4 4 4 1 Nitromethane 4 4 4 4 4 1 O A 548 a 1 3 2 2 2 O T 634 b 3 4 4 4 1 Octachlorotoluene 4 4 4 4 1 2 Octadecane 1 2 2 4 1 1 N octane 2 4 1 4 1 1 Octyl Alcohol 2 4 1 2 1 1 Oleic Acid 3 4 3 4 2 1 Oleum Spirits 2 4 4 1 2 Olive Oil 1 1 1 3 1 1 O Dichlorobenzene 4 4 2 4 1 1 Oxalic Acid 2 1 2 1 1 Oxygen Cold 2 2 4 1 1 1 Oxygen 200 400 F 4 4 4 2 2 1 Ozone 4 2 1 1 1 1 Paint Thinner Duco 4 4 4 4 2 2 Palmitic Acid 1 2 4 1 1 Peanut Oil 1 1 1 1 1 1 Perchloric Acid 4 4 4 4 1 1 Perchloroethylene 2 4 4 4 1 1 Petroleum Below 250 F 1 2 2 2 1 1 Petroleum Above 250 F 4 4 2 4 2 1 Phenol Carbolic Acid 4 4 4 4 1 1 Phenylbenzene Diphenyl Diphenyl 4 4 4 4 1 1 Phenyl Ethyl Ether 4 4 4 4 4 3 Phenyl Hydrazine 4 4 4 1 1 Phorone Diisopropylidene Acetone 4 4 4 4 4 4 Phosphoric Acid 20 2 2 2 1 1 Phosphoric Acid 45 4 2 3 1 1 Phosphorus Trichloride 4 1 1 XIII TECHNICAL SECTION SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Pickling Solution 4 4 4 4 2 1 Picric Acid 2 4 4 1 1 Pinene 2 4 4 4 1 1 Pine Oil 4 2 3 1 1 Piperidine 4 4 4 4 4 Plating Solution Chrome 4 1 1 Plating Solution Others 1 4 1 1 Polyvinyl Acetate Emulsion 1 Potassium Acetate aq 2 4 4 4 4 4 Potassium Chloride aq 1 1 1 1 1 1 Potassium Cupro Cyanide aq 1 1 1 1 1 1 Potassium Cyanide aq 1 1 1 1 1 1 Potassium Dichromate aq 1 1 2 1 1 1 Potassium Hydroxide aq 2 4 4 3 4 1 Potassium Nitrate aq 1 1 1 1 1 1 Potassium Sulfate aq 1 4 1 1 1 Producer Gas 1 2 1 2 1 1 Propane 1 1 1 4 1 1 i Propyl Acetate 4 4 4 4 4 4 n Propyl Acetate 4 4 4 4 4 4 Propyl Acetone Methyl Butyl Ketone 4 4 4 3 4 4 Propyl Alcohol 1 4 1 1 1 1 Propyl Nitrate 4 4 4 4 4 1 Propylene 4 4 4 4 1 1 Propylene Oxide 4 4 4 4 4 4 Pydraul 10E 29 ELT 4 4 4 4 1 1 Pydraul 30E 50E 65E 90E 4 4 4 1 1 1 Pydraul 115E 4 4 4 4 1 1 Pydraul 230E 312C 540C 4 4 4 4 1 1 Pyranolo Transformer Oil 1 1 4 4 1 1 Pyridine 4 4 4 4 4 1 Pyroligneous Acid 4 4 4 4 Pyrrole 4 4 4 2 4 3 P S 661 b 1 4 1 P D 680 1 4 1 Radiation 3 3 1 3 4 1 Rapeseed Oil 2 2 2 4 1 1 Red Oil MIL H 5606 1 1 2 4 1 1 RJ 1 MIL F 25558 B 1 1 2 4 1 1 RP 1 MIL F 25576 C 1 1 2 4 1 1 SAE 30 1 1 1 1 1 1 SEA 90 1 1 1 4 1 1 SAE 90 EP GL 5 2 1 2 4 1 1 Sal Ammoniac 1 1 1 2 1 1 Salicylic Acid 2 1 1 1 Salt Water 1 4 1 1 1 1 Sewage 1 4 1 1 1 1 Shell Alvania Grease 2 1 1 2 1 1 Silicate Esters 2 4 4 1 1 Silicone Greases 1 1 1 3 1 1 Silicone Oils 1 1 1 3 1 1 Silver Nitrate 2 1 1 1 1 1 Skydrol 500 4 4 4 3 4 2 Skydrol 7000 4 4 4 3 2 2 Soap Solutions 1 4 1 1 1 1 Soda As 1 1 1 1 1 Sodium Acetate aq 2 4 4 4 4 4 Sodium Bicarbonate aq Baking Soda 1 1 1 1 1 Sodium Bisulfite aq 1 4 1 1 1 1 Sodium Borate aq 1 1 1 1 1 Elastomer S N E H V A Sodium Chloride aq 1 1 1 1 1 Sodium Cyanide aq 1 1 1 1 1 Sodium Hydroxide aq 2 3 1 2 2 1 Sodium Hypochlorite aq Chlorox 2 4 2 2 1 1 Sodium Metaphosphate aq 1 1 1 Sodium Nitrate aq 1 4 1 Sodium Perborate aq 2 2 2 1 1 Sodium Peroxide aq 2 4 3 4 1 1 Sodium Phosphate aq 1 1 2 4 1 1 Sodium Silicate aq 1 1 1 1 Sodium Sulfate aq 1 4 2 1 1 1 Sodium Thiosulfate aq 2 4 2 1 1 1 Soybean Oil 1 1 2 1 1 1 Stannic Chloride aq 1 2 2 1 1 Stannous Chloride aq 1 2 2 1 1 Steam Under 300 F 4 4 1 3 4 1 Steam Over 300 F 4 4 1 4 4 1 Stearic Acid 2 4 2 1 Stoddard Solvent 1 1 3 4 1 1 Styrene 4 4 4 4 2 2 Sucrose Solution 1 4 1 1 1 1 Sulfite Liquors 2 4 4 4 1 1 Sulfur 4 4 2 3 1 1 Sulfur Chloride aq 3 4 2 3 1 1 Sulfur Dioxide Dry 4 4 2 2 1 1 Sulfur Dioxide Wet 4 4 2 2 1 1 Sulfur Dioxide Liquified Under Pressure 4 4 2 2 1 1 Sulfur Hexafluoride 2 4 4 2 1 1 Sulfur Trioxide 4 4 4 2 1 1 Sulfuric Acid Dilute 3 2 4 4 1 1 Sulfuric Acid Conc 4 4 4 4 1 1 Sulfuric Acid 20 Oleum 4 4 4 4 1 1 Sulfurous Acid 2 4 4 4 1 1 Sunoco All Purpose Grease 1 1 4 1 1 Sunoco SAE 10 1 2 4 1 1 Tannic Acid 1 4 2 2 1 1 Tar Bituminous 2 4 4 2 1 1 Tartaric Acid 1 2 1 1 1 Terpineol 2 1 1 Tertiary Butyl Alcohol 2 4 3 2 1 1 Tertiary Butyl Catechol 4 4 4 1 Tertiary Butyl Mercaptan 4 4 4 4 1 1 Tetrabromoethane 4 4 4 4 1 1 Tetrabromomethane 4 4 4 1 1 Tetrabutyl Titanate 2 1 1 Tetrochloroethylene 4 4 4 4 1 1 Tetraethyl Lead 2 3 1 1 Tetrahydrofuran 4 4 4 4 4 4 Tetralin 4 4 1 1 Thionyl Chloride 4 4 4 2 1 Titanium Tetrachloride 2 4 4 4 1 1 Toluene 4 4 4 4 1 4 Toluene Diiscocyanate 4 4 4 4 4 4 Transformer Oil 1 2 1 2 1 1 Transmission Fluid Type A 1 1 1 2 1 1 Triacetin 2 4 4 4 2 Triaryl Phosphate 4 4 4 3 1 1 Tributoxy Ethyl Phosphate 4 4 4 1 1 Tributyl Mercaptan 4 4 4 4 1 1 Tributyl Phosphate 4 4 4 4 4 1 XIV SECTION 1 B TECHNICAL SN EH VA Properties Nitrile Acrylates Vamac Silicone Fluoroelastomers Aflas Ratings 1 Minor effect 2 Moderate effect 3 Static only 4 Not Recommended insufficient data Elastomer S N E H V A Trichloroacetic Acid 2 4 4 3 2 Trichloroethane 4 4 4 4 1 1 Trichloroethylene 4 4 4 4 1 4 Tricresyl Phosphate 4 4 2 3 1 1 Triethonol Amine 2 4 1 4 1 Triethyl Aluminum 4 4 4 2 1 Triethyl Borane 4 4 4 1 1 Trinitrotoluene 4 4 4 2 2 Trioctyl Phosphate 4 4 2 3 2 1 Tung Oil China Wood Oil 1 2 4 1 1 Turbine Oil 2 1 2 4 1 1 Turbo Oil 35 1 2 4 1 1 Turpentine 1 2 4 4 1 1 Type I Fuel MIL S 3136 1 1 4 1 1 Type II Fuel MIL L 3136 2 2 4 1 1 Type III Fuel MIL L 3136 2 4 4 1 1 TT N 95 a 1 4 1 2 TT N 97 B 1 3 3 4 1 2 TT I 735 b 1 1 1 1 TT S 735 Type I 1 2 2 4 1 2 TT S 735 Type II 1 4 1 2 TT S 735 Type III 1 4 1 2 TT S 735 Type IV 1 1 2 3 1 2 TT S 735 Type V 1 1 1 3 1 2 TT S 735 Type VI 1 1 1 3 1 2 TT S 735 Type VII 1 4 1 2 TT T656b 4 4 4 4 4 3 Unsymmetrical Dimethyl Hydrazine UDMH 2 4 4 Elastomer S N E H V A Varnish 2 4 1 4 1 1 Vegetable Oils 1 1 1 2 1 1 Versilube F 50 1 1 2 3 1 1 Vinegar 2 4 2 1 1 2 Vinyl Chloride 4 4 4 1 1 VV B 680 2 2 2 4 1 1 VV G 632 1 1 2 3 1 2 VV G 671c 1 1 2 3 1 2 VV H 910 2 2 2 4 1 1 VV I 530a 1 1 2 3 1 2 VV K 211d 1 4 1 2 VV K 220a 1 2 2 4 1 2 VV L 751b 2 2 2 4 1 2 VV L 800 1 1 1 3 1 2 VV L 820b 1 1 1 3 1 2 VV L 825a Type I 1 1 1 3 1 2 VV L 825a Type II 1 1 1 3 1 2 VV L 825a Type III 2 2 3 4 1 2 VV O 526 1 1 2 3 1 2 VV P 216a 1 1 2 3 1 2 VV P 236 2 2 3 4 1 2 Wagner 21 Brake Fluid 3 4 3 4 1 Water 1 4 1 1 1 1 Whiskey Wines 1 4 1 1 1 1 White Pine Oil 2 4 1 1 White Oil 1 1 1 4 1 1 Wood Oil 1 1 1 4 1 1 Xylene 4 4 4 4 1 3 Xylidine Di methyl Aniline 3 4 4 4 4 2 51 F 23 1 1 1 3 1 1 XV TECHNICAL SECTION SECTION 1 C TECHNICAL Sealing System Preparation And Seal Installation STORAGE AND HANDLING OF OIL SEALS Introduction Careful storage and handling of radial lip type seals is necessary to avoid hazards prior to installation which would adversely affect service life General Stora ge Radial lip type seals are very robust long lived components However as with any precision components they should be stored with care as the service life of bearings and or other costly machined parts may depend upon how well the seal performs Hazards which may be encountered include temperature ozone humidity radioactive materials fumes dust grit and mechanical damage The storage area should be cool 60 to 90 F and with average 40 to 70 humidity Seals should be stored on a first in first out basis since even under ideal conditions an unusually long shelf life may cause deterioration of element materials Excessive heat and or exposure to ozone can cause premature aging of some types of sealing elements thus reducing service life Avoid storage near sources of heat To prevent ozone aging keep away from direct or reflected sunlight and electrical equipment that may generate ozone Excessive humidity will deteriorate some seal element materials as well as cause corrosive damage to metal cases and springs Oil seals should be stored in a place other than a work area to avoid possible mechanical damage by equipment or falling objects A closed container will provide protection from mechanical damage as well as dust grit and other conta minants Mec hanical Damage Many oil seal failures can be traced to improper handling or storage of the seal To avoid damage Keep in the box in which they were originally packed Never store seals unprotected in open bins Never hang seals on a hook Never tag seals Keep seals clean Avoid dropping seals This may dislodge the spring distort or contaminate the seal Never use old or damaged seals Lip Compound Ag e Resistance Shelf Life Resistance to deterioration in storage varies between elastomers Proper storage under conditions which minimize aging effect is extremely important The chart below presumes proper storage conditions and reflects general usage applications Type of Lip Material Shelf Life Urethane 3 to 5 years Nitrile 5 to 10 years AFLAS Fluoroelastomer Silicone Up to 20 years Polyacrylate VAMAC Up to 20 years Felt Leather PTFE Indefinite XVI SECTION 1 C TECHNICAL Sealing System Preparation And Seal Installation SHAFT REQUIREMENTS Proper engineering of the components of the assembly is necessary for seal reliability Shaft requirements have been determined by the Rubber Manufacturer s Association through thousands of hours of testing The following items should be considered at the original equipment design stage or whenever anexisting application is to be upgraded Shaft Finish Shaft finish a prime factor in proper functioning of a lip seal should be specified as 10 25 microinches Ra 0 20 0 60 micrometers Ra with no machine lead Shaft Lead Maximum permissible lead angle is 0 0 05 The most acceptable method for obtaining this surface characteristic is plunge grinding Shaft Diameter Shaft diameter tolerances are shown below Tolerances greater than those shown should be used only if agreed upon between user and supplier Shaft Diameter inches Tolerances Shaft Diameter mm Tolerances To and including 4 000 003 To and including 100 0 08 4 001 through 6 000 004 100 01 through 150 0 10 6 001 through 10 000 005 150 01 through 250 0 13 10 001 and larger 006 250 01 and larger 0 15 Shaft Hardness Radial lip type seals will function satisfactorily on mild steel cast iron or malleable iron shafts Under normal conditions however the section of the shaft contacted by the sealing lip should be hardened to Rockwell C30 minimum If however the shaft may be nicked or damaged during handling or assembly a Rockwell C45 minimum is recommended Shaft Chamfer To aid installation and help prevent damage to the seal lip the leading edge of the shaft should have a chamfer or radius which must be smooth and free of nicks or rough spots Shaft to Bore Misalignment STBM The distance the center of rotation is displaced from the center of the bore It usually exists to some degree due to normal machining and assembly tolerances Misalignment results in uneven wear and if excessive will shorten seal life To measure attach a dial indicator to the shaft and indicate off the seal bore while rotating the shaft For specific limitations see the National Oil Seal Design Type and Descriptioncharts on page 6 7 Dynamic Runout Twice the distance the center of the shaft is displaced from the center of rotation It can result from a bent shaft lack of shaft balance or other manufacturing variables To measure find the total movement of an indicator held against the seal area of the slowly rotating shaft For specific limitations see the National Oil Seal Design Type and Descriptioncharts on page 6 7 Shaft Material Steel stainless steel and certain cast irons all provide good sealing surfaces if finished properly Brass or bronze shafts are not recommended nor are alloys of aluminum zinc magnesium and other similar elements If plating is considered it should be hard nonporous chrome plate Flaking or plating exposes razor edges which may cut the seal lip XVII TECHNICAL SECTION SECTION 1 C TECHNICAL Sealing System Preparation And Seal Installation BORE REQUIREMENTS Maintaining proper bore characteristics is important if the integrity of the sealing system is to remain intact To provide proper fit of National Oil Seals the dimensions relative to Bore Tolerance and seal Press Fit should be followed Bore Tolerances and Seal Press Fit The Table below indicates recommended Bore Tolerances and seal Press Fit for both Metal and Rubber O D seals Bore Bore Nominal Press Metal O D Nominal Press Rubber O D Diameter Tolerance Fit Metal O D Tolerance Fit Rubber O D Tolerance Up to 2 000 0 001 0 005 0 002 0 008 0 003 2 000 to 3 000 0 001 0 005 0 003 0 002 0 010 0 003 3 001 to 4 000 0 0015 0 006 0 003 0 011 0 003 4 001 to 5 000 0 0015 0 006 0 003 0 011 0 003 5 001 to 7 000 0 0015 0 007 0 003 0 012 0 004 7 001 to 12 000 0 002 0 008 0 004 0 003 0 013 0 004 12 001 to 20 000 0 003 0 012 0 005 0 015 0 005 20 001 to 40 000 0 004 0 013 0 005 0 018 0 006 40 001 to 60 000 0 006 0 016 0 006 0 020 0 007 Bore Material Ferrous materials are commonly used for bore housings The table above applies to these types of materials However if other materials are used i e aluminum or composites higher rates of thermal expansion are usually involved and should be considered Bore Finish A finish of 125 microinches Ra 3 2 micrometers Ra or smoother should be maintained to assure a leak free emvironment If the bore is rougher than 125 microinches Ra 3 2 micrometers Ra National Oil Seal offers an environmentally friendly waterbase resinous coating on all of the O D s of the metal cases This coating process or material is termed Redicoat REDICOAT IS A REGISTERED TRADEMARK OF FEDERAL MOGUL CORP Bore Configuration The lead corner of the seal bore should be chamfered for ease of seal installation Rough corners or burrs can scratch the seals outside diameter and cause potential leak paths 02 03 INCH BORE REDICOAT OIL SEAL CASE XVIII FACE MACHINED SQUARE WITH BORE INSTALLATION TOOL THROUGH BORE INSTALLATION TOOL BOTTOMS ON MACHINED BORE FACE BORE AS CAST BORE FRONT INSTALLATION TOOL THROUGH BORE INSTALLATION TOOL BOTTOMS ON SHAFT AS CAST BORE FRONT INSTALLATION TOOL BACK MIN R MACHINED SQUARE WITH BORE BOTTOM BORE SEAL BOTTOMS ON MACHINED BORE SHOULDER SECTION 1 C TECHNICAL Sealing System Preparation And Seal Installation INSTALLATION OF SEALS PROCEDURES GUIDELINES AND TOOLS Oil Seal Installation Procedure 1 Inspect the bore Insure that it is clean and free of burrs that might distort the seal or cut the O D that may cause leakage Check for roundness and make sure the leading edge is either rounded or chamfered 2 Inspect the shaft Look for machining lead burrs dirt and paint that might damage the seal or provide a leak path If the old seal has worn a groove into the shaft it needs to be repaired In many cases National Redi Sleeves will enable you to quickly and inexpensively repair this condition For more information regarding National Redi Sleeves see page 23 24 3 Inspect the Shaft End Remove all burrs and sharp edges The shaft should be chamfered or radiused to assure the seal is not damaged during installation If this is not possible then an installation sleeve should be used 4 Inspect Splines and Keyways If the shaft has splines or keyways cover with a sleeve shim stock or tape to protect the seal lip 5 Inspect the Seal Check the seal for any damage nicks cuts scratches or distortion of the sealing lip that may have been caused during shipping A damaged seal should be replaced 6 Assure Proper Seal Direction The sealing lip usually faces toward the medium to be sealed 7 Prelube the Seal Prior to installation the sealing lip should be prelubed with the lubricant to be sealed It is not nec essary for the O D of metal parts to be lubed however a light film of oil should be applied to the O D of rubber coated seals to aid in the installation process and reduce sheer stress during installation This prelube should reduce or eliminate the possibility of a rubber O D seal from backing out of the bore immediately after installation 8 Installation Tools Select an installation tool see Fig below For easy accurate installation of National s popular stan dard style oil and grease seals use the RD 2000 which can easily install seals up to 3 375 85 7 mm O D The best tool will have a diameter slightly smaller than that of the housing bore and will apply force only on the seal case Bearing races may be used as an installation tool adapter when approved tools are not available 9 Never Hammer Directly On the Seal Screwdrivers drift pins or punches should not be used as installation tools Steel hammers are not recommended for use with approved installation tools the shock of steel on steel can dis lodge the garter spring After the seal has engaged the bore the seal should be driven in evenly with only enough force to seat it in the bore Recommended Installation Tools XIX TECHNICAL SECTION SECTION 1 D TECHNICAL GENERAL INFORMATION OIL SEAL DISTRESS ANALYSIS TROUBLE SHOOTING CHECKLIST The following chart is intended to assist in the evaluation of oil seal distress It is not intended to be complete and should not be interpreted as inclusive of all distress causes Questions or requests for additional information relative to oil seal distress should be directed to your Timken Representative Symptom Probable Cause of Leak Sealing Lip Surface Can be caused by excessive operating Hardened temperatures by inadequate lubrication or by incompatibility with sealed fluid Sealing Lip Brittle Operating temperatures of lubricant may exceed or Cracked recommended limits for the type of sealing member material Make sure seal is proper size Too tight a fit on shaft will cause overheating Check adequacy of lubricant for the type seal used Sealing Lip Shows Shaft finish may be too rough at point of lip contact Excessive Wear Seal not properly prelubricated before installation around entire Check adequacy of lubrication for the type seal used circumference Make sure seal is proper size Too tight a fit on the shaft can cause overheating and rapid wear Shaft run out or shaft whip may exceed recommended limits See that the seal seats close to the bearing and check for excessive looseness in bearing or splines Sealing Lip Worn Usually due to misalignment of shaft to bore This On One Side causes rapid wear at one point on the sealing lip Sealing Lip Contact Make sure seal is proper size On Shaft Too Light Check shaft for excessive wear at point of contact Shaft may be too soft check minimum hardness specifications for the existing operating conditions Check the installation tools used Mounting cones and sleeves must not have O D of more than 1 32 greater than the shaft or the sealing lip may be overstretched Sealing Lip Nicked Careless storage handling or use of improper or Scratched assembly tools Failure to clean and prepare shaft Failure to protect sealing member when installing over splines keyways etc Sealing Lip Look for excessive pressure build up or plugged up Blown Out vents Vents should be masked during painting to direction of lip prevent clogging contact reversed Make sure the lubricant level is correct Heating of the lubricant causes expansion and the pressure can blow out the seal Sealing Lip Surface Spongy lip is result of incompatibility between fluid Softened and sealing element Seal Case Distorted O D of seal may be too large for housing bore Bore diameter should not vary from that recommended for the size of the seal Housing bore may be excessively out of round If bore diameter and out of round limits are correct look for evidence of careless handling or use of improper installation tools Symptom Probable Cause of Leak Seal Garter Spring May be caused by careless handling or use of Damaged improper installation tools or methods Excessive spreading of the sealing lip during installation can damage the spring Inner Parts of Seal Improper installation tools used Assembly Loose Check out of round limits of housing bore and make sure seal O D is not too large for bore Either condition can cause seal distortion which although not readily apparent may be enough to loosen the inner parts of the seal and cause leakage Seal Cocked In Usually due to improper tools or installation methods Housing Make sure seal O D is not too large for bore Check bore for burrs scale or chips that prevent the seal from properly seating Excessive Shaft Check for presence of abrasive dirt and grit Wear Shaft may not have been properly cleaned before installation or exterior dirt and dust conditions may be too severe for the type of seal used Shaft may be too soft Shaft hardness limits are dictated by the severity of exterior dirt conditions the amount of lubrication and surface speeds Make sure seal is proper size Too tight a fit on the shaft will cause excessive wear on both lip and shaft Check for insufficient lubrication at the seal Shaft Scratched Proper installation procedure call for careful or Gouged inspection and preparation of the shaft prior to installation of the seal Shaft must be thoroughly cleaned before installing the seal Paint shellac or cement on the surface where the lip contacts the shaft prevents proper sealing Spiral Machine Shafts should be polished at point of sealing lip Grooves on Shaft contact or reground so spiral marks direct the fluid inward rather than outward under the sealing lip Leakage Around Check housing bore for out of roundness the O D of the If eccentricity is only slight 001 the use of special Seal cement on the O D surface of seal may offset the condition Check O D surface of seal for evidence of damage due to careless handling or improper installation Seal may be cocked in housing Check interior of bore for excessive roughness dirt scratches or burrs Excessive This is not actually leakage although it may look like Prelubrication it When too much prelubricant is used the excess melts and runs out Check this possibility before removing a seal that has the appearance of leaking XX SECTION 1 D TECHNICAL GENERAL INFORMATION REDI SLEEVES INSTALLATION AND REMOVAL REDI SLEEVES Redi Sleeves Installation Each Redi Sleeve comes with its own installation tool and removable installation flange The installation tool reduces the possibility of sleeve distortion and provides for sleeve installation without removal of the shaft from the serviced equipment 1 Minimum shaft surface preparation is required Clean the old seal surface thoroughly and file down burrs and rough areas 2 Determine sleeve position necessary to cover the seal wear tracks Measure to a convenient point or mark directly on the shaft 3 Redi Sleeves may be installed to any depth The column labelled Installation Depth in the Redi Sleeve Size Listing indicates the maximum distance from the end of the shaft the sleeve can be installed using the supplied installation tool Check whether the supplied tool will reach this position If not a tool can be fabricated using tub ing or pipe to make deeper installations If this is required make sure the ends are cut square and are deburred 4 Fill any deep scores or gouges on the shaft with a thread repair compound Make sure to install the sleeve prior to the filler hardening 5 Drop the Redi Sleeve into the installation tool so that only the flange projects Note that the flanged end of the sleeve goes on the shaft first 6 Gently pound the center of the installation tool with a wood block or large soft face mallet until the sleeve reaches the previously measured point on the shaft The wood block or large soft face mallet reduces the possi bility of distorting the installation tool 7 If clearance is required after installation the Redi Sleeve flange can be removed Prior to installation use side cutters to cut through the flange to the pre cut line After the sleeve is installed pry flange away from the seal surface The flange will peel away along the pre cut line Redi Slee ve Removal Suggested methods of sleeve removal 1 Application of heat will cause the sleeve to expand and permit removal 2 Wire cutters may be used to tear the sleeve from the shaft using a twisting motion 3 With the flange removed tapping the sleeve with a hammer may cause stretching on the sleeve and allow for removal XXI TECHNICAL SECTION SECTION 1 D TECHNICAL GENERAL INFORMATION NATIONAL WEAR SLEEVES DESCRIPTION INSTALLATION REMOVAL WEAR SLEEVES National Wear Sleeves National wear sleeves are precision components that press fit onto a shaft actually becoming part of the shaft The out side diameter is ground to provide a surface finish of 10 25 microinches Ra 25 64 Micrometers Ra A radius of the I D of the sleeve facilitates installation on to the shaft National wear sleeves are designed to be installed at ambient temperatures heating of the wear sleeve is not required for proper installation The opposite end of the wear sleeve is also radiused on the O D to minimize the potential for damaging the seal during assembly Wear sleeves offer cost reduction opportunities to original equipment manufacturers who must now machine large or complex shafts or spindles to tight dimensional and finish tolerances in order to provide an adequate running surface for the seals While transporting or moving the shaft from place to place extreme care must be taken to prevent damage to a finished shaft When wear sleeves are used scratching or scoring of the shaft is eliminated since the seal will run on the precision finished sleeve installed when the seal and or hub is installed Installation 1 Remove all dirt and oil from the sealing surface 2 Coat shaft surface with a liquid sealant or gasket cement 3 Press wear sleeve into position with an installation tool or use a flat plate against the sleeve Do not hammer on the thin edge of the sleeve or the wear sleeve may become warped or out of round 4 Remove excess sealant from the wear sleeve edges No sealant should be left on the finished sleeve surface or seal leakage may result Remo val Suggested methods of wear sleeve removal 1 Application of heat will cause the sleeve to expand and permit removal 2 Tapping the sleeve with a hammer may cause stretching of the sleeve and allow for removal 3 Careful use of a rounded blunt chisel may remove the sleeve Caution It is not nesessary to cut the sleeve completely prior to removal Shaft Tolerances For National Wear Sleeves Up to 3 000 001 3 001 to 6 000 0015 Shaft Finish Prime shaft finishes of 125 RMS or better may require very little cement under the sleeve With shaft finishes of over 125 RMS complete inside penetration of the cement is recommended Prefix Explanation J Ground 10 25 RMS JV Unground phosphate coated XXII SECTION 1 D TECHNICAL V SEALS GENERAL INFORMATION V SEALS DESCRIPTION MATERIAL STYLES DIMENSIONAL REFERENCE Description The V Seal is a simple and versatile elastomeric face type seal produced in Nitrile or Viton It can be the primary sealing element in an application or it can be a contaminant excluder or back up seal The seal mounts on and typically rotates with the shaft while the lip lightly contacts the counterface The elasticity of the V Seal design eases installation permits a broader range of shaft sizes and allows use on eccentric and misaligned shafts Fluoroelastomer V Seals A simple versatile elastomeric face type seal produced in Nitrile or Viton Timken s line of V Seals function as an additional sealing element V Seals are recommended for extreme high contaminant environments The V Seal typically mounts on and rotates with the shaft while the lip lightly contracts the counterface The elastic design eases installation within a broad range of applications Wear Sleeves As precision components that press fit onto a shaft Timken s line of Wear Sleeves may deter damage to shafts and spindles both in use and during transport Designed for ambient temperature assembly and available in various sizes and finishes Wear Sleeves provide protective seal running surfaces and reduce the need for complex and expensive shaft machining repair or replacement O Ring Seal Kits Available in inch and metric sizes Timken s line of O Ring Seal Kits have the coverage you need for the most popular applications O Ring Seals are made of a high quality Nitrile rubber or a high temperature fluoroelastomer Timken can provide you with three assortments OK 311 OK 312 and OK 411 The MD 999 O Ring identification gauge designed to measure and identify O Ring sizes Installation Tools The RD 2000 and RD 2001 tools help to properly install seals and prevent unnecessary downtime Timken s RD 2000 Seal Driver puts seals in place quickly easily and without damage allowing smooth equipment operation without premature seal leakage The RD 2001 Bearing Race and Seal Driver easily installs bearings and seals without damaging the bearing race or housing Timken also offers the time saving RD 2004 O Ring Installation and Removal Tool as well as the durable and precise MD 2000 Metal Caliper To order National industrial seals contact your Timken sales representative or call 1 877 4 TIMKEN in the U S In Canada call 1 800 565 4927 for English or 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals Other Quality Industrial Products Seals Catalog Inside B 4 1 05 4 51 PM Page 11 National is a registered trademark of Federal Mogul Corp licensed for use by The Timken Company Redi Sleeves Redi Coat and Redi Seals are registered trademarks of Federal Mogul Corp Zero Duplication and V Seals are trademarks of Federal Mogul Corp Viton is a registered trademark of DuPont Corporation Timken is the registered trademark of The Timken Company www timken com 2005 The Timken Company Printed in USA 20M 04 05 07 Order No 7707 Timken is your resource for quick cost effective sealing solutions To learn more about how Timken can enhance your line of seals call Timken in the U S at 1 877 4 TIMKEN and in Canada at 1 800 565 4927 for English and 1 800 565 0438 for French Canadian Visit us on the Web at www timken com industrialseals INDUSTRIAL SEALS CATALOG o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o National Industrial Seals Seals Catalog FC BC 4 1 05 4 36 PM Page 1
