WIXLIB

Engineering DataEngineering Data6. Adjust machine’s rotational speed to 60 RPM.7. Measure the axial movement of the threadwhile the shaft or sleeve rotates for a periodof 30 seconds.8. Look for movement at both edges of the shaftby placing the thread there as well.9. Reverse the direction of the shaft or sleeverotation and repeat the test.10. Refer to Table 2 to determine results.Comparing Shaft Lead – Lead AngleThe lead of a shaft is compared with other shaftsof differing diameters by calculating the lead angle.This is found by dividing the string advance by theproduct of the shaft circumference (both in inches),and the number of revolutions required to advancethe string the measured amount.Figure 2: Clockwise LeadString AdvanceLEAD ANGLE (Shaft circumference) x (number of turns)For example, a string will advance 0.300 in. in 30seconds on a 4.000 in. shaft rotating at 60 RPM. Thelead angle equals 0.0456 degrees 0 degrees 2 minutes44 seconds. A 2 in. shaft with the same advance(0.300 in. in 30 seconds at 60 RPM) has a lead angle of0.0912 degrees 0 degrees 5 minutes 28.3 seconds.For best seal performance, industry standards recommendthat the lead angle of a shaft be 0 degrees /- 0.05degrees ( /- 0 degrees /- 3 minutes ).Figure 3: Counter-Clockwise LeadFigure 1: Clockwise LeadFigure 4: Counter-Clockwise Lead3

Engineering DataEngineering DataShaft-to-Bore MisalignmentShaft-to-bore misalignment is the distance by whicha shaft is off center relative to its bore. To measurethis, calculate the distance between the shaft centerline and the bore centerline, as shown in Figure 5.“X” Shaft-to-bore MisalignmentShaft“X”BorePressure DataTable 3 shows the maximum operating pressuresuitable for standard oil seals and Table 4 showsmaximum pressure limits for a variety of sealing options.If an application generates higher surge pressures thanwhat are listed, full details should be submitted fordesign consideration and engineering recommendations.Custom and high-pressure seals can be developed,although features such as ability to take greater eccentricities may be sacrificed to gain pressure capabilities.If possible, machine designs should include vents toallow the seal to operate more efficiently.Table 3: Operating Pressure Limits For Standard Oil SealsShaft SpeedShaftm/s (metersper second)0-10001001-20002001 & up0 0-5.15.2-10.210.3 & uppsi (poundskPaper sq.in) (kilopascals)barBoreFigure 5: Shaft-to-bore MisalignmentDynamic RunoutDynamic runout is the amount by which a shaft, atthe sealing surface, does not rotate around the truecenter. You can measure dynamic runout by holdinga dial indicator against the shaft surface while it isslowly rotated. The resulting measurement is calleda total indicator reading, or TIR. See Figure 6.“Y” Dynamic Runout“Y”ShaftMaximum* Pressure*f/m (feetper minute)Center of rotation of shaft7534835210.480.350.21* Split oil seals are not recommended for applications involving fluidpressure.Table 4: Maximum Pressure LimitsSealTypeStandard Oil SealsPS-I Oil SealsBearing IsolatorsMaximum Operating Pressure*psi (poundsper ent0.4810.34Ambient* Maximum operating pressure decreases as surface speedincreases. Please consult your Timken sales representative forspecific application operating pressures.† Retaining plate required at pressures greater than 75psi.BoreShaft and Bore TolerancesSeal performance depends on close tolerances inthe finished dimensions of the shaft, housing boreand oil seal. Tables 5, 6 and 7 give more informationon proper tolerance allocation.Figure 6 — Dynamic Runout4

Engineering DataEngineering DataTable 5: Shaft Diameter Tolerances for Oil SealsShaft DiameterRecommended ToleranceinchmminchmmUp thru 4.0004.001 - 6.0006.001-10.00010.001 & UpUp thru 101.60101.61-152.40152.41-254.00254.01 & Up 0.003 0.004 0.005 0.006 0.08 0.10 0.13 0.15The recommended bore diameter tolerances shownin Table 6 apply only to housings made from ferrousmaterials. For recommendations on seals made fromnon-ferrous materials, submit full details to yourTimken sales representative.Surface SpeedShaft finish, misalignment and runout, lubrication,pressure and seal design are all factors in determiningsafe operating speeds and become more importantthe more the shaft speed increases. To determine theappropriate surface speed for your application(s), usethe formulas below or see Appendix F for the surfacespeed chart. Because surface speed limits vary withseal design, also refer to the product listings for limitson specific Timken industrial seals.Bore depth standard tolerance is /- 0.016 in. (0.4 mm).Surface Speed (f/m) Shaft Dia. (in.) x RPM x 0.262Surface Speed (f/m) Shaft Dia. (mm) x RPM x 0.0103Surface Speed (m/s) Shaft Dia. (in.) x RPM x 0.0013299Surface Speed (m/s) Shaft Dia. (m/m) x RPM x 0.0000524Table 6: Housing Bore Tolerances for Oil SealsConversion FormulasHousing Bore Diameter(Nominal)Recommended BoreDiameter ToleranceinchmminchmmThru 1.0001.001 - 3.0003.001 - 4.0004.001 - 4.3754.376 - 6.0006.001 - 7.0007.001 - 8.0008.001 - 9.0009.001 - 10.00010.001 - 20.000Thru 25.4025.41 - 76.2076.21 - 101.60101.61 - 111.13111.14 - 152.40152.41 - 177.80177.81 - 203.20203.21 - 228.60228.61 - 254.00254.01 - 508.0020.001 - 30.000508.01 - 762.0030.001 - 40.000762.01 - 1016.0040.001 - 60.0001016.01 - 1524.00 0.001 0.001 0.0015 0.0015 0.0015 0.002 0.002 0.002 0.002 0.002-0.004 0.002-0.006 0.002-0.006 0.002-0.010 0.03 0.03 0.04 0.04 0.04 0.05 0.05 0.05 0.05 0.05-0.10 0.05-0.15 0.05-0.15 0.05-0.25Conversion FormulasMultiplyByTo ObtainInch (in.)millimeter (mm)barbarkilopascal (kPa)kilopascal (kPa)psi (lb/sq. in.)psi (lb/sq. eter (mm)Inch (in.)kilopascal (kPa)psi (lb/sq. in.)barpsi (lb/sq. in.)barkilopascal (kPa)Temperature Conversion Formulas F 1.8 ( C) 32 C ( F - 32)/1.8Recommended Bore Finish 100 microinches Ra (2.54 micrometers)or smoother.Table 7: Shaft and Bore Tolerances for Bearing IsolatorsShaft DiameterinchThru 6.0006.001 & UpRecommended TolerancemminchmmThru 152.40152.41 & Up 0.002 0.003 0.05 0.08Bore DiameterRecommended ToleranceinchmminchmmThru 6.0006.001 - 10.00010.001 & UpThru 152.40152.41 - 254.00254.01 & Up 0.001 0.002 0.003 0.03 0.05 0.085

Engineering DataOil Seals Installation InstructionsModel 145 Face Seal Dimensional DataCross-Section DimensionsDIM #Description1234567Height of cross-sectionShaft contact widthOverall free widthAssembled widthShaft DiameterMaximum face boreMinimum face diameterAssembled DimensionsModel 145A1IMPORTANT NOTERecommendations printed in this catalog pertaining to shaft finishes,misalignment, runout, speeds, temperatures and tolerances aregenerally applicable. The combination of a selected seal with a certainapplication, and the operating circumstances involved, could modifythe performance of the seal and/or the equipment. To get the mostout of your Timken seals, submit full information to ensure that theseal(s) you receive are suitable for your application.6Model 145A21.000 in. (25.4 mm)0.500 in. (12.7 mm)1.344 in. (34.1 mm)0.563 in. (14.3 mm)2.594 in. (65.9 mm)0.969 in. (24.6 mm)2.000 0.500 in. (50.8 12.77 mm) 0.781 0.156 in. (19.8 4.0mm)Application DependentApplication DependentShaft 1.000 in. (Shaft 25.4 mm) Shaft 0.391 in. (Shaft 9.9 mm)Shaft 1.000 in. (Shaft 114.3 mm) Shaft 1.750 in. (Shaft 44.5 mm)

Installation Instructions Oil SealsSeals Installation InstructionsEquipment Inspection and PreparationBefore installing any lip seal, equipment shouldbe thoroughly inspected. Follow the specificationsbelow for best results:Shaft Surface Finish [Roughness Averageor AA (Arithmetic Average)] With the exception of PS-1 (Model 61), all shaftsshould have a surface finish within 10-20 µin.(0.25-0.50 µm). For PS-1 (Model 61), the surface finish shouldbe within 4-8 µ in (0.10-0.20 µm). The surface finish direction of all seals mustbe perpendicular to the shaft axis of rotation.Bore Surface Finish, Ra ([Roughness Averageor AA (Arithmetic Average)] The surface finish of all bores must be 100 µin.(2.54 µm). The surface finish direction of all bores must beperpendicular to the shaft axis of rotation.B Minimum30 MaximumAShaftDia.Corners MUSTbe burr freeFigure 7: Shaft GeometryTable 8: Edge Relief for ShaftsA - Shaft DiameterB - Minimum*inchmminchmmThru 0.3940.395 - 0.7870.788 - 1.1811.182 - 1.5751.576 - 1.9691.970 - 2.7562.757 - 3.7403.576 - 5.1185.970 - 9.4499.450 & UpThru 10.0010.01 - 20.0020.01 - 30.0030.01 - 40.0040.01 - 50.0050.01 - 70.0070.01 - 95.0095.01 - 130.00130.01 - 240.00240.01 & 200.751.001.251.501.752.002.252.753.505.50* If a shaft lead-in radius is used, maintain the diametral differenceto no less than indicated valueShaft Surface Hardness, Rockwell C-Scale With the exception of PS-1 (Model 61), all shaftsshould have a surface hardness between30-40 Rockwell C.BoreDepth15 Min.25 Max. For PS-1 (Model 61), the surface hardnessmust be within 50-70 Rockwell C.CornerRadiusAdditional SpecificationsChamferLength Both the shaft and bore should include anedge relief (preferably an edge chamfer), asshown in Figures 7 and 8. See Tables 8 and 9for specific values. Both the shaft and bore should be clear of anydefects, such as spiral-machining marks, burrs,sharp edges, nicks, scratches and corrosion.Figure 8: Housing Bore DimensionsTable 9: Edge Relief for Housing BoresNominal SealWidthChamferLengthMax. HousingCorner RadiusinchmminchmminchmmThru 0.394Over 0.394Thru 10.00Over 00.757

Installation Instructions Seals Typically, the shaft has a wear groove createdfrom previous seals. Make sure the new sealinglip does not seal in the same location. When drive features such as keyways or splinesare present, they must be covered using aninstallation tool similar to the one shown inFigure 10 below, and using “Installation MethodD” shown in Figure 10 on the next page. If theuse of a tool is prohibited by the size of the shaft,use one of the following options:Installation MethodsInstallation Method AThru Bore:Installation tool bottomson machined faceInstallation Method BThru Bore:Seal bottoms onmachined bore shoulderInstallation Method CThru Bore:Installation tool bottomson shaftInstallation Method DThru Bore:Mounting thimble assistsin compressing seal lip foreasier installation Polyethylene tape Brass shim stock with smooth edges Wooden plug with smooth edgesSeal InspectionSeal Outside DiameterSpringFigure 10: Installation MethodsSealing LipFigure 9: Seal Cross Section Inspect the sealing lip for any signs ofdamage, such as cuts, indentations and nicks. Make sure that the spring (finger or gartertype) is retained within the seal (bonded orassembled). Inspect the seal OD, looking for any signsof damage, such as cuts (in rubber seals),indentations and nicks.Solid Seal InstallationInstall the seal(s) using one of the proper installationmethods shown in Figure 10. When using installationtooling, the diameter, or contact area, should not bemore than 0.010 in. (0.254 mm) smaller than the borediameter. If the use of an installation tool is prohibitedby the size of the seal, then: Rest a block of wood (piece of 2 in. x 4 in. orsimilar) on the seal and use a mallet to drive theseal into position. Do not hit the seal directly withthe mallet, as it may cause damage. When using this method,follow a star pattern (asshown in Figure 11) toavoid “cocking” of the seal. Place the ends of thewooden block at positions1 and 2 (as shown inFigure 11).15843672Figure 11: Star Pattern Hit the center of the board with the mallet.8

Seals Installation Instructions Continue by rotating the wooden block to theappropriate positions (3 and 4, 5 and 6, 7 and 8),hitting the center of the block with the malleteach time.IMPORTANT NOTEThe 0.015 in. protrusion will be built into the width of the seal. Thedepth of the bore housing should be machined to the seal widthspecified on the package. Repeat the pattern until the seal is properly seatedin the housing bore. The seal is fully seated whenthe difference between the seal surface and thehousing surface is equal to or less than 0.010 in.(0.254 mm).Split Seal InstallationAmbient pressure/non-flooded applications only Apply a thin coat of lubricant to the seal lip andshaft. Split the seal along the axis of rotation (shownin Figure 12) and place the seal around the shaft.Figure 12: Split Seal Separation Beginning with the split ends, insert the seal intothe top of the housing bore. Make sure the splitends of the seal are touching. Working downwards on both sides, continueinserting the seal into the housing bore, finishingat the bottom. Once the seal is properly seated in the housingbore, it should protrude from the housing surfaceby 0.015 in. (0.381 mm), as shown in Figure 13.The 0.015 in. protrusion is built into the width ofthe seal. The depth of the bore housing shouldbe machined to the seal width specified on thepackaging.Figure 13: Split Seal InstalledInspectionAfter installation, inspect the sealing areas for leaks,paying special attention to the area around the sealinglip and the OD. Make sure that the sealing lip is not inthe groove worn into the shaft from the previous seal.ShaftDiameterNo. ofBolts“A” MinimumPlate Thickness3 in. - 8 in.(76.2 - 203.2 mm)61/8 in. (3.18 mm)Bolts on a max. of 6 in. (152.4mm) chord, spacing centeredabout split in end plate1/4 in. (6.35 mm)Over 8 in.RECESS DEPTH(? SPACE)SPLIT RETAINERPLATE"A"BOLT? INCH(? MM) ETER“B” 0.28 “X” Minimum, 0.5 “X” Maximum“X” Bore Dia. - Shaft Dia.2*Figures shown are for a guideonly. Good machine designpractices should be followed.Figure 14: Standard Oil Seal Installation9

Timken Bearing Isolators Installation InstructionsEquipment PreparationBefore installing an isolator, all equipment should beinspected. First, disconnect all power to the machineryand follow standard safety procedures to avoid personalinjury or equipment damage during installation.Second, inspect the shaft and bore surfaces. Theshaft finish should be better than 64 µin (1.63 µm)with minimal lead, but a polished surface is notrequired. The bore surface should be 64 µin (1.63 µm).Both the shaft and bore should have a chamfer orother edge relief to prevent the o-ring from shearing.Third, check the shaft and bore for damage orimperfections. They should both be clear of burrs,nicks, indentations and any other defects. Clean allforeign debris from the area. Note that, in manycases, the previous seal may have worn a grooveinto the shaft. Make sure that the rotor o-ring of thenew seal does not ride in this area.Finally, if drive features such as keyways or splinesare present on the shaft, they must be covered duringinstallation. To do so, use an installation tool, polyethylenetape, brass shim stock with smooth edges or a woodenplug with smooth edges.Installation Instructions IsolatorsIf your isolator has a drain port, rotate it to the 6 o’clockposition. For isolators with a mark on the OD of thestator, rotate it to the 12 o’clock position to ensureappropriate positioning of the drain port. Some nonmetallic bearing isolators may be installed in any direction, and there is no need to position the seal. SeeFigure 15 for clarification, or contact your Timken salesrepresentative if you require additional information.Drain at 6:00 position,Mark at 12:00 position.Figure 15: Drain Port PositioningUsing your hands only (no installation tool required),push the isolator gently into the bore. If required, gentlytap the isolator using a soft-faced mallet. While flangedisolators are fully seated when the flange is flushagainst the housing, flangeless isolators can be installedat the bottom of the housing and are fully seatedwhen they are flush with the bore face. See Figure 16for clarification.Seal PreparationIMPORTANT NOTETimken metallic and non-metallic bearing isolators are unitized,and any attempts to take them apart will not only cause sealdamage, but will void the warranty on the product.Before installation, inspect the o-ring’s OD and ID,making sure they are free of any defects. Use thelubricant included with your isolator to lightly greaseall the o-rings.InstallationUsing your hands only (no installation tool required)push the isolator evenly onto the shaft as shown inFigure 14.Figure 14: Seal Installation on Shaft10Figure 16: Flanged Seal Flush with Housing FacePost-InstallationInspectionAfter installation, inspect the sealing area fordamage. Gently spin the shaft to make sure therotor is working properly.IMPORTANT NOTEDo not flood the isolator or block the expulsion ports, as theseactions can cause seal damage and failure.RemovalTo remove an old isolator from your equipment, startfrom the back side of the seal and perform installationinstructions in reverse. If access to the back side ofthe isolator is difficult, pry it from the housing a littleat a time. Be careful not to damage the shaft orhousing bore during seal removal.

Seal & Material Selection GuideSeal & Material ntof FrictionTimken ESDark Blue881.053Timken VGreen761.158SiliconeLight Blue82Over2.0000.100(FDA - Red)BlackN/AXX XN/A N/AN/A N/ASpeed (FPM)XMax RadialMisalignment XXXXXXXXXXXXXXXXXN/AN/AX XMaxPressureXXXN/AN/AXXXXXN/AN/AXMediaLevelXSeal Material*** Values shown are generally applicable limits. For specific application help, contact yourTimken sales representative.** Seal materials shown are typical for oil seals. Other materials are available upon request.Contact your Timken sales representative for more information.# Models 145 and 143 face seals are notavailable in Timken N, but are suppliedwith standard nitrile material.-40 F to 200 F(-40 C to 93 C)-40 F to 300 F(-40 C to 150 C)-22 F to 400 F(-30 C to 204 C)-75 F to 350 F(-59 C to 176 C)-120 F to 400 F(-84 C to 204 nceColor80XXXN/AN/AUnder0.005Max SpikeTemperatureType ofMotionShaft EStainless SteelXXXBlackGylon XXXXN/AN/AMaterial Selection Guide*Material Type#Timken XXXTimken VXXXXXXXXXXTimken ESXXXTimken NXXX100%XXXXX50%XXXXXX25%XX150 psiXXXXXXXX7 -5000RotaryXX0-1000Over 12 inchesXXReciprocating6-12 inchesXXXOperatingTemperatureParameter3-6 inchesSeal TypeModel 57Model 58Model 63Model 53Model 23Model 26(solid)Model 26(split)Model 59Model 87Model 64Model 145#Model 143#P/S (Model

Oil Seal Selection Single Lip Seal: All-purpose seal available in a wide range of sizes. Suitable for most sealing applications. Dual Lip Seal: Used for difficult sealing problems or applications involv-ing the separation of two fluids or exclusion of foreign materials. Single Lip Split Seal: