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SKF BEARING MAINTENANCE HANDBOOK PDF

Friday, February 7, 2020


The SKF bearing maintenance handbook is a comprehensive working guide for the main ten- ance professional. With the recommendations in this handbook. SKF Bearing Installation and Maintenance Guide. • The mounting and dismounting section has been expanded to include: Individual step-by-step instructions. Correct bearing lubrication is an essential step in reaching the bearing's service lifetime .. SKF Maintenance Handbook or consult an SKF application 3D machine free view, screen rotation on tablets, sppn.info report.


Skf Bearing Maintenance Handbook Pdf

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SKF Maintenance and Lubrication Products PUB MP/P1 EN. • CR Seals handbook PUB • Bearing Installation and Maintenance Guide PUB. To download a PDF document of this catalogue and for information about important . Checklist after the bearing size is determined SKF bearing grease selection chart. and retaining increasingly scarce and expensive maintenance and diagnostic . Rolling bearings support and guide, with minimal. Rolling bearings in paper machines; SKF Pulp and Paper Practices - Compilation of all published issues; Bearing installation and maintenance guide; Bearing.

The lock- over different rollers in one row. Oscillate the inner ring in a circumferen- tial direction to properly seat the rollers. Radial clearance reduction method Step 4 Step 6 for mounting tapered bore 1: Apply the nents of the bearing unless the bearing will locknut with its chamfer facing the bearing Precautions be lubricated by a circulating oil or oil mist DO NOT apply the locking washer at this For hollow shafts.

It may not be necessary to remove leading with the large bore of the inner ring solid tapered shaft the preservative from the internal compo. The inner prong of the spherical roller bearings on an locking washer should face the bearing and adapter sleeve Shaft tolerance limits for adapter mounting seatings be located in the keyway. Precautions Step 4 The bearings should be left in their original Screw off the nut from the adapter sleeve Step 9 packages until immediately before mount.

The dimen- a locknut slot. Find the locking washer tang that is nearest ing so they do not become dirty. DO NOT drive the bearing mounting process by equating axial drive up Nominal diameter Tolerance limits further up the taper.

If the slot is slightly past the sional and form accuracy of all components. By knowing the inch inch radial internal clearance further. For easier posi- tioning of the sleeve. The angular drive-up method simplifies the nut until tight. Step 10 Step 2 Check that the shaft and outer ring can be Wipe the shaft with a clean cloth. Step 5 Wipe preservative from the adapter O. Apply- ing a light oil to the sleeve outside diameter surface results in easier bearing mounting and removal.

Step 8 Angular drive-up method for Step 3 Remove the locknut and install the locking mounting tapered bore 1: Reapply the lock. Step 6 Position the adapter sleeve on the shaft.

Do not bend the locking tab to the bottom of the locknut slot. Remove oil from the shaft to pre- vent transfer of oil to the bore of the adapter sleeve. Step 8 Place the bearing on the adapter sleeve. Reapply the locknut until system. With Step 15 the bearing hand tight on the adapter. Step 7 Step 10 Step 13 Wipe the preservative from the bore of the Place a reference mark on the locknut face Remove the locknut and install the locking bearing.

It may not be necessary to remove and shaft. Do not drive the bearing up any further. A method for checking if the bear- ing and sleeve are properly clamped is to place a screwdriver in the adapter sleeve split on the large end of the sleeve. Step 12 leading with the large bore of the inner ring Using a hammer and a spanner wrench.

If the slot is slightly past the damage the locking washer. Applying pressure to the screwdriver to attempt to turn the sleeve around the shaft is a good check to determine if the sleeve is clamped down properly. Once the appropriate locknut part number has been obtained.

The inner the preservatives from the internal compo. Do not attempt to tighten tang. Apply the begin tightening the locknut the corre- locknut with its chamfer facing the bearing sponding tightening angle. Do not bend the locking tab to the the locknut with hammer and drift.

Step 11 tight. If the sleeve no longer turns on the shaft. Note the specific lock nal clearance further. The bottom of the locknut slot. Precautions For hollow shafts.

Use this guide to help visualize the turning K 65 0. A new method of K 60 0. The bearings should be left in their original packages until immedi- ately before mounting so they do not become dirty.

In order for K 40 0. For sizes greater than those shown above we recommend the use of the SKF Hydraulic drive-up method. This enables accurate positioning of the K 0. This method provides: Reduced time to mount bearings. Monitor the pressure by the gauge on the selected pump.

Reapply the locknut be necessary to remove the preservative until tight. Step 2 Wipe the shaft with a clean cloth. Drive the bearing up the adapter sleeve the an emery cloth or a fine file. Step 10 Step 7 Remove the hydraulic nut and install the Applying a light oil to the sleeve outside locking washer on the adapter sleeve. The diameter surface results in easier bearing inner prong of the locking washer should mounting and removal.

As an alterna- tive. For easier is best monitored by a dial indicator. Remove oil from the shaft to Note: For bearings with a bore diameter great- prevent transfer of oil to the bore of the er than mm.

Step 1 Step 6 Step 9 Remove any burrs or rust on the shaft with Position the adapter sleeve on the shaft.

Remove the locknut and locking washer washer at this time. Check that the shaft and outer ring can be Wipe preservative from the adapter O. The axial drive-up required bearing centerline. It may not of the adapter sleeve. Ensure that the from the adapter sleeve assembly. Wipe the preserva.

Surfaces lightly oiled with light oil. The difference in drive-up between one surface and two surfaces is the result of smoothing. The dimensional and form style lock nuts and locking washers are used accuracy of all components.

Screw off the locknut from the adapter dures apply as other bearings with cylindri. Step 2 This principle is shown in Figure 11 as Wipe the shaft with a clean cloth.

AN and N lock nuts and locking washers. Initial axial displacement of one ring in rela.

Step 1 al displacement or misalignment are tion to the other can be used to increase the Remove any burrs or rust on the shaft with extreme. See page 13 for the different washer. The spacer dimen. Axial must be locked in the axial direction as and radial clearance are interdependent. E or KML. CARB section. If standard KM. Remove oil from the shaft to pre.

Select the proper radial internal clearance ing a light oil to the sleeve outside diameter reduction range from Table 6 on page Do not attempt to tighten the locknut bearing. Step 10 Wipe preservative from the adapter O. Apply the locknut with its chamfer facing the bearing DO NOT apply the locking washer at this time because the drive-up procedure may damage the locking washer. Measure the unmounted radial internal clearance in the bearing.

Applying a light coating of oil to the chamfered face of the lock nut will make mounting easier. Repeat this procedure in two or three other locations by resting the bearing on a different spot on its O. Step 5 outer ring sphere. Step 9 damaged and chips can enter the bearing. With the bearing hand tight on the adapter sleeve. The locknut will be the preservative from the internal compo. Measure the radial internal clearance in the bearing by inserting progressively larger feeler blades the full length of the roller between the most unloaded roller and the Record the measurement the bearing hand tight on the adapter.

It may not be necessary to remove with hammer and drift. This is the unmounted radial inter. It is permissible to locknut so that the sleeve grips the shaft vent transfer of oil to the bore of the adapter rotate a roller up onto the feeler blade but and the adapter sleeve can neither be sleeve.

With a slight resistance. Do not bend the locking tab to the bot- the bearing further up the taper. If the slot is slightly past the rotated easily by hand. DO NOT drive tang. Step 12 Step 13 Step 14 Remove the locknut and install the locking Find the locking washer tang that is nearest Check that the shaft and outer ring can be washer on the adapter sleeve. The inner prong a locknut slot. Measure the radial internal clearance in the bearing by inserting progressively larger Step 2 feeler blades the full length of the roller Wipe the shaft with a clean cloth.

Do not attempt to tighten the locknut with a hammer and drift. Radial clearance reduction Step 4 method for mounting tapered Wipe the preservative from the bore of the bore 1: Apply the locknut with its chamfer facing the bearing Step 1 DO NOT apply the locking washer at this Remove any burrs or rust on the shaft with Step 5 time because the drive-up procedure may an emery cloth or a fine file.

Select the proper radial internal clearance nal clearance. The locknut will be damaged and chips can enter the bearing. Measure the unmounted radial internal damage the locking washer. It may not be necessary to remove bearings onto a tapered shaft the preservative from the internal compo- nents of the bearing unless the bearing will Precautions be lubricated by a circulating oil or oil mist The feeler gauge should be For hollow shafts.

Applying a light clearance in the bearing. The values for coating of oil to the chamfered face of the unmounted internal clearance for tapered lock nut will make mounting easier.

The dimensional and form Place the bearing on the tapered shaft. The bearings should be left in their original packages until immedi- ately before mounting so they do not Step 6 become dirty. Record the measurement on the largest size blade that will slide Step 7 through. Step 8 Angular drive-up method for Step 4 Remove the locknut and install the locking mounting tapered bore 1: DO NOT drive the bearing mounting process by equating axial drive up further up the taper as this will reduce the to the rotation of a locknut.

Do not bend the locking tab to the should be checked. In order to make this mounting method work properly. Step 7 Wipe the preservative from the bore of the bearing. Remove any burrs or rust on the shaft with threads outboard as indicated. Measure the shaft diameter. Precautions Step 9 The bearings should be left in their original Find the locking washer tang that is nearest packages until immediately before mount- a locknut slot.

Remove oil from the shaft to prevent transfer of oil to the bore of the adapter sleeve. If the slot is slightly past the ing so they do not become dirty.

By knowing the radial internal clearance further. Applying a light oil to the sleeve outside diameter surface results in easier bearing mounting and removal.

Step 10 Check that the shaft and outer ring can be Step 2 rotated easily by hand. For easier positioning of the sleeve. It may not be necessary to remove the preservative from the internal components of the bearing unless the bearing will be lubri- Step 3 cated by a circulating oil or oil mist system. Step 6 Step 1 Position the adapter sleeve on the shaft. The inner prong of the CARB toroidal bearings on an assembly and remove the locking washer. Check that the shaft and outer ring can be rotated easily by hand.

The inner to match the taper of the adapter. Do not Step 15 drive the bearing up any further. Applying pressure to os p Re- the screwdriver to attempt to turn the sleeve around the shaft is a good check to deter- mine if the sleeve is clamped down properly. Step 8 Step 10 Step 13 Place the bearing on the adapter sleeve.

The locknut will be bottom of the locknut slot. Place a reference mark on the locknut face Remove the locknut and install the locking leading with the large bore of the inner ring and shaft. Applying a light Table 7. With the ANCE. Reapply the locknut until time because the drive-up procedure may Locate the specific bearing part number in tight. Do not attempt to tighten the locknut tang. Do not bend the locking tab to the bearing hand tight on the adapter.

Step 12 Using a hammer and a spanner wrench. Note the specific lock nut part the taper. DO NOT drive the bearing further up damage the locking washer. Apply the to use when measuring the tightening angle. In order for this method C K 25 0.

SKF Bearing Maintenance Handbook__EN

Bearing Bearing bore Axial Metric nut Turning Inch nut Turning The axial drive-up method relies on the designation diameter drive-up designation angle designation angle d s a a bearing being driven up a tapered seat a specific amount in order to ensure the inner mm mm degrees degrees ring is expanded enough to properly clamp 22xx series the shaft or sleeve.

The bearings should be For sizes greater than those shown above we recommend the use of the SKF Hydraulic drive-up method. Figure 12 Step 2 Wipe the shaft with a clean cloth. A new method of accu- C K 45 0. E Remove any burrs or rust on the shaft with hydraulic nut an emery cloth or a fine file.

Table 7 SKF hydraulic axial drive-up method for tapered bore 1: E fitted with a dial C K 70 0. The C K 60 0. HMV C. The C K 80 0. Table 8 also provides the 23xx series required psi pressures required for each. This enables C K 0. Other- Step 5 wise. Remove oil from the shaft to prevent ing position by applying the hydraulic pres- transfer of oil to the bore of the adapter sleeve. The Shaft tolerance limits for adapter mounting and removal. The axial drive-up is best monitored by a dial indicator.

Reapply the locknut until Nominal diameter Tolerance limits inch inch from the internal components of the bear.

Applying a light oil to the sleeve outside Remove the hydraulic nut and install the diameter surface results in easier bearing locking washer on the adapter sleeve. Ensure that the bear. Step 8 Find the locking washer tang that is nearest Place the bearing on the adapter sleeve a locknut slot. Drive the bearing up to the start- bore. It may not face the bearing and be located in the slot of be necessary to remove the preservative the adapter sleeve.

Step 12 Check that the shaft and outer ring can be rotated easily by hand. Step 3 Step 7 Step 10 Measure the shaft diameter. DO NOT drive the bearing further up over including ing unless the bearing will be lubricated by a the taper. As an alternative. Do not bend the locking tab to the washer at this time. C 22xx series C 31xx series C K 97 0. The picture shows the tions or reference www.

Step 1 used for small shaft diameters is installed in Please consult SKF for alternative instruc- Remove any burrs or rust on the shaft with the same manner. If grease is used as a lubricant. S2 and S3 refer to the shaft tolerance under the seal for a capabilities. The resistance Step 5 when using the hydraulic assist method. Assembly instructions for Note: Be should only require slight hand pressure to Mount the bearing.

The old style LER labyrinth seal still cific bearing being used in the housing. See Table 10 for initial Step 3 grease fill. If the grooves. Removal of this paint is and lightly oil the bearing seats.

For M5 style SAF housings. Publication Smear grease in the used as a grease fill line fill to the bottom of Table 9 bore of the seal cartridge.

The O-ring can be lubricated Note: Several mounting methods exist. Taconite TER seal is a cast line in the housing base that can be Coat the shaft with oil. PosiTrac Plus seal.

See Figure Locate Refer to the beginning of this section for keep them nearby. Failure to follow these Step 4 instructions could result in injury or damage Install inboard seal. Read these instructions before starting work.

For seal misalignment pillow block housings adapter mounted bearing. Removal of this paint is not required prior to installation. Caps and bases of hous- — — 28 40 ings are not interchangeable.

In cases 8. Some housings require two stabilizing rings. Figure 13 Step 8 Figure 14 Stabilizing rings Grease fill line A stabilizing ring should be used if a spheri.

With oil lubrication. Table 10 Note: The stabilizing ring should also be used for all toroidal roller bearing CARB units. Two dowel pins will align the cap to its — — — 22 mating base. For specific sizes. So in — N N — N order to determine the maximum operating N temperature of the housing. Even though the bearing inside the housing can accommodate more Size Tightening torque ft-lbs Size Tightening torque ft-lbs misalignment. Suggestions for Step 2 Step 6 relubrication frequency and quantity are Wipe the shaft with a clean cloth.

Shaft sizes Setscrew Torque Permissible no. If pillow block eleva. Lubrication All SKF unit roller bearing pillow blocks and flanged housings are equipped with a grease fitting which allows the roller bearing to be relubricated in service.

The FREE bearing must be centered in the found on page The opti- Remove any burrs or rust on the shaft with mum contact seal performance is obtained an emery cloth or a fine file.

Step 3 Centerline of bearing When relubricating the bearing care must Check the shaft diameter. The spring tion. To achieve porting surface is flat.

Be sure the sup. Relubrication cycles housing to allow for axial shaft expansion. It will be neces. When both set- screws are tightened on the shaft. Bolt the housing securely to the Even though the bearing inside the housing support. The standard sary to relieve the bearing load while mov. SKF suggests medium temper- ature. When the load is Heavy. Mounting instructions for collar Step 5 Misalignment mounted roller unit pillow blocks Slide the bearing and housing onto the shaft The misalignment capability of SKF collar and flanged housings and position it where the pillow block is to mounted roller units is a maximum of 1.

It will be neces- instructions. In the following mine the centered position. Mounting instructions for Step 4 Step 7 Concentra mount roller unit pillow Lubricate the shaft with light oil.

Rolling-element bearing

Do not tighten any mount. Step 5 ing screws. Clean the base of the housing and support tection plugs from the dismounting collar. This is a NOTE: Do not remove the plastic pro. Tolerances shown are typically 2 7 5 found on cold finished carbon steel bar. If pillow block eleva- Step 1 tion must be adjusted by shims.

Bolt the result in the bearing eventually working its Step 3 assembly securely to the support. Be sure the sup- porting surface is flat. Check the shaft diameter. Read all instructions carefully before both directions as far as it will go and deter- mounting or dismounting.

Step 8 Step 6 Count the number of setscrews on the Slide the bearing assembly. The misalignment capability of SKF Concen. The opti. Even though the bearing inside the housing can accommodate more misalignment. Remove assembly from Remove any burrs or rust on the shaft with the shaft. When relubricating the bearing care must Unbolt the unit from the support structure Step 10 be taken to use greases that are compatible and remove the complete assembly from Lastly tighten each setscrew.

If sively dirty environments. Suggestions for relubrication frequency and quantity are Step 5 found on page When a unit is being relu. Do not use auxiliary equipment bricated.

If the bearing unit will not slip off until the long end of the supplied allen es with oil viscosity of to CST the shaft during removal. SKF suggests medium temper. Step 9 Lubrication Step 4 Tighten the mounting screws located in the All SKF unit roller bearing pillow blocks and Using a screw driver or other suitable tool. In the unlikely event such as a hammer or pipe in tightening the may cause damage to the bearing seals.

Bolt the direction of shaft rotation to lock the col- Step 3 the flanged housing securely to the support. Be sure the supporting surface is flat. Clean the base of pillow block and the sup- port surface on which it rests. With flanged Place a punch or drift in the blind hole in the housings. The spring of the starts to spring. Mounting instructions for Step 4 Eccentric lock 6B ball unit pillow blocks and Slide the bearing and housing onto the shaft Slide the collar up to the bearing and turn it flanged housings and position.

Bolt pillow Step 7 block securely to the support. Be sure the support surface is flat. This completes the procedure for to the shaft. When the load is heavy. The set- Table Step 2 Step 5 Wipe the shaft with a clean cloth. If the pillow block elevation must be adjusted by shims. This also tight- Check the shaft diameter. When both setscrews are tight. For eccentric lock-type units. Turn the collar Remove any burrs or rust on the shaft with quickly by hand in the direction of shaft an emery cloth or a fine file.

When relubri. Dismounting instructions for er ring of the bearing from lining up with ball unit pillow blocks and flanged the groove in the housing bore and the housings bearings will not be relubricated. All ball bearing units are sealed at both sides with rubbing contact seals and are filled with a special long life grease of NLGI consistency 2. See Lubrication section. It will be necessary to relieve removed from the shaft. The housing can then be unbolted from its with a grease fitting that allows the bearing plete bearing unit can then be removed support and the complete bearing unit to be relubricated in service.

It will be necessary cating. Misalignment greater than this will prevent the lubrication holes in the out. When a unit is being relubricated. SKF suggests a medium temperature. Setscrew lock Lubrication Step 3 Generally speaking. Step 7 Position the collar so that a setscrew is directly opposite the split in the sleeve. No attempt the supporting surface is flat. In the following the shims MUST extend the full length and instructions.

Eccentric lock achieve a tight interference fit on the shaft Remove the collar first. Step 3 Check shaft diameter. Tilt the bearing on using commercial grade shafting. Snug Recommended shaft tolerances the mounting screws to finger tightness Shaft diameter Tolerance holding the short leg of the supplied allen wrench.

Step 6 Slide the bearing and housing. If the pillow from its normal position and slide it out should be made to disassemble the bear. Read all instructions carefully before tion and slide it out through the slots pro.

Step 2 Bolt the pillow block securely to the support. This is a unit assembly. To remove bearing from housing Mounting instructions for Step 5 Concentra ball unit pillow blocks Clean the base of the pillow block and the Setscrew lock and flanged housings support surface on which it rests.

For is being relubricated. NLGI 2 grease having a ing mounting. All ball bearing units are sealed at checked. During the test run. Snug the mounting maximum operating temperature range friction. Remove complete unit from the shaft. Concentra ball unit pillow blocks level of an oil bath. Dismounting instructions for lubrication equipment. Tighten the housing much lubricant in the arrangement or that mounting bolts to the correct torque. Most ball bearing units are fitted with an Other causes are that the associated com- Flange housings — 2nd unit injection molded.

The test run should be carried out opposite the split in the sleeve. Whistling or screeching to be relubricated in service. Lastly tight. The grease has good speed. Do not use auxiliary equipment able for operating temperatures between unloaded and accelerated to high speed. Cages the bearing is radially or axially distorted.

Select a category of download below:

Should bearing arrangement. Misalignment greater than this Loosen the mounting setscrews 1 to 2 full will prevent the lubrication holes in the out. SKF for lubrication recommendations. An uneven cating. Bolt the to see that they perform correctly and any flange securely to the mounting surface. Place the housing mount. When a unit immediately after start up is normal. Under no circumstances should a of 7. Lightly impact the bearing collar side of the shaft until the bearing releases from shaft.

Interference fits on a cylindrical shaft bearings may require considerable force to The cost of such inspection may actually Bearings with a bore diameter up to dismount.

Dry with a clean. Never spin a dirty bearing. Contact your SKF thoroughly and the bearing and housing Interference fit in the housing Authorized Distributor for information on flushed with some hot. Take care when following this rosive. Carefully rotate the many factors such as bearing design. Oils and greases should be removed in until after it has been cleaned.

Roller radial with short cylindrical rollers 3. Roller radial spherical double-row 4. Roller needle or with long cylindrical rollers 5. Roller radial with spiral rollers 6. Ball radial-thrust single-row 8. Ball thrust, ball thrust-radial 9. Roller thrust or thrust-radial The fifth and sixth digit define structural modifications to the bearing.

For example, on radial thrust bearings the digits define the contact angle, or the presence of seals on any bearing type. The seventh digit defines the "width series", or thickness, of the bearing.

The width series, defined from lightest to heaviest, is: 7, 8, 9, 0, 1 extra light series , 2 light series , 3 medium series , 4 heavy series. The third digit and the seventh digit define the "dimensional series" of the bearing [16] [17] There are four optional prefix characters, here defined as AXXXXXXX where the X's are the main designation , which are separated from the main designation with a dash.

The first character, A, is the bearing class, which is defined, in ascending order: C, B, A. The class defines extra requirements for vibration, deviations in shape, the rolling surface tolerances, and other parameters that are not defined by a designation character. The second character is the frictional moment friction , which is defined, in ascending order, by a number 1—9. The third character is the radial clearance, which is normally defined by a number between 0 and 9 inclusive , in ascending order, however for radial-thrust bearings it is defined by a number between 1 and 3, inclusive.

The fourth character is the accuracy ratings, which normally are, in ascending order: 0 normal , 6X, 6, 5, 4, T, and 2.

Ratings 0 and 6 are the most common; ratings 5 and 4 are used in high-speed applications; and rating 2 is used in gyroscopes. For tapered bearings, the values are, in ascending order: 0, N, and X, where 0 is 0, N is "normal", and X is 6X. Unlike the prefix, not all of the designations must be defined. In essence, SKF solutions are available wherever and whenever customers need them.

Overall, the SKF brand and the corporation are stronger than ever. As the knowledge engineering company, we stand ready to serve you with world-class product competencies, intellectual resources, and the vision to help you succeed. SKF pioneered practical fly-by-wire technology and is a close working partner with all aerospace industry leaders. As an example, virtually all aircraft of the Airbus design use SKF by-wire systems for cockpit flight control. SKF is also a leader in automotive by-wire technology, and has partnered with automotive engineers to develop two concept cars, which employ SKF mechatronics for steering and braking.

Further by-wire development has led SKF to produce an all-electric forklift truck, which uses mechatronics rather than hydraulics for all controls.

SKF is working closely with global industry leaders to develop efficient and trouble-free turbines, providing a wide range of large, highly specialized bearings and condition monitoring systems to extend equipment life of wind farms located in even the most remote and inhospitable environments. Working in extreme environments In frigid winters, especially in northern countries, extreme sub-zero temperatures can cause bearings in railway axleboxes to seize due to lubrication starvation.

SKF created a new family of synthetic lubricants formulated to retain their lubrication viscosity even at these extreme temperatures. SKF knowledge enables manufacturers and end user customers to overcome the performance issues resulting from extreme temperatures, whether hot or cold. For example, SKF products are at work in diverse environments such as baking ovens and instant freezing in food processing plants.

Developing a cleaner cleaner The electric motor and its bearings are the heart of many household appliances.The width series, defined from lightest to heaviest, is: 7, 8, 9, 0, 1 extra light series , 2 light series , 3 medium series , 4 heavy series. The picture shows the tions or reference www.

SKF is also a leader in automotive by-wire technology, and has partnered with automotive engin eers to develop two concept cars, which employ SKF mecha tronics for steering and braking. For bearings with an interference fit on both mirror and a dental-type probe with a erly or is being overhauled. Step 3 Centerline of bearing When relubricating the bearing care must Check the shaft diameter.

These systems are categorized as centralized and minimum quantity lubrication. The grease sible limits of the bearing does not adversely amount required for relubrication is dis.