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Shanghai Shang Shaft Bearing Quality Inspection Institute Co., Ltd.

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Address: 301 Shangxue Road, Jiading District, Shanghai

Causes and solutions of bearing damage

2020-09-01 09:49

We all know that bearings will appear in the process of usingPeel, burn, crack defectAnd so on, and when the actual problems occur, we often forget the causes of these situations and solutions. The following summary of the common problems for everyone to collect, I hope the application process to help you.

1. stripping

1. Phenomenon

1) Peeling of running surface

2) After peeling, it is obviously concave and convex

2. Reason

1) Improper use of excessive load

2) Poor installation

3) Poor accuracy of shaft or bearing box

4) The clearance is too small

5) Foreign body intrusion

6) Rust occurs

7) Hardness decrease caused by abnormal high temperature

3. Measures

1) Re-study the conditions of use

2) Re-select the bearing

3) Recongood play

4) Check the machining accuracy of shaft and bearing box

5) Study the design around the bearing

6) Check the installation method

7) Check the lubricant and lubrication method

2. Burn

1.  Phenomenon

The bearing heats up and discolors, and then burns and cannot rotate.

2. Reason

1) clearance is too small (including deformation part clearance is too small)

2) Insufficient lubrication or improper lubricant

3) Excessive load (excessive preloading)

4) Roller deflection

3. Measures

1) Set appropriate clearance (increase clearance)

2) Check the type of lubricant to ensure the amount of injection

3) Check the conditions of use

4) Prevent positioning errors

5) Check the design around the bearing (including bearing heating)

6) Improve the bearing assembly method

3. crack defect

1. Phenomenon

Partially notched and cracked

2. Reason

1) Excessive impact load

2) Excessive interference

3) There is a large stripping

4) Friction crack

5) Poor accuracy on the installation side (the corner circle is too large)

6) Poor use (use a copper hammer to insert large foreign objects)

3. Measures

1) Check the conditions of use

2) set the appropriate interference and check the material

3) Improve installation and use methods

4) Prevent friction cracks (check the lubricant)

5) Check the design around the bearing

4. holder damaged

1. Phenomenon

1) Loose or broken rivets

2) Cage broken

2.Reason

1) Excessive torque load

2) High-speed rotation or frequent speed changes

3) Poor lubrication

4) Clipping in foreign objects

5) Large vibration

6) Poor installation (installation in inclined state)

7) Abnormal temperature rise (resin cage)

3. Measures

1) Check the conditions of use

2) Check the lubrication conditions

3) Re-study the selection of cages

4) Pay attention to the use of bearings

5) Study shaft and bearing housing rigidity

5. chafing and stuck injury

1. Phenomenon

1) The surface is rough, accompanied by small deposition

2) The scratch of the ring rib and the roller end face is called stuck

2. Reason

1) Poor lubrication

2) Foreign body intrusion

3) Roller deflection caused by bearing tilt

4) Oil cut-off of rib surface caused by large axial load

5) Large surface roughness

6) Large sliding of rolling element

3. Measures

1) Research on lubricants and lubrication methods

2) Check the conditions of use

3) Set the appropriate pre-pressure

4) Enhanced sealing performance

5) Normal use of bearings

6. rust corrosion

1. Phenomenon

1) The surface is partially or completely rusted

2) Rust in the shape of rolling element teeth

2. OriginalBecause

1) Poor storage status

2) Improper packaging

3) Insufficient rust inhibitor

4) Intrusion of water and acid solution

5) Take the bearing directly by hand

3. Measures

1) prevent rust in storage

2) Enhanced sealing performance

3) Regularly check the lubricating oil

4) Pay attention to the use of bearings

7. wear

1. Phenomenon

Surface wear, resulting in dimensional changes, often accompanied by wear, wear marks

2. Reason

1) Lubricant mixed with foreign matter

2) Poor lubrication

3) Roller deflection

3. Measures
1) Check the lubricant and lubrication method
2) Enhanced sealing performance
3) Prevent positioning errors

8. electric erosion

1. Phenomenon
The rolling surface has fire-breathing mouth-shaped pits, and further development is wave-like.
2. Reason

Rolling surface energization

3. Measures

1) Make current bypass valve

2) Take insulation measures to avoid current passing through the bearing

9. indentation

1.Phenomenon

Pits on the surface caused by solid foreign matter or impact and scratches during installation

2. Reason

1) Intrusion of solid foreign body

2) Clipping in stripping tab

3) Impact and falling off caused by poor installation

4) Install in the inclined state

3.  Measures

1) Improve installation and use methods

2) Prevent foreign matter from mixing

3) If it is caused by metal sheet, other parts must be checked

10. creep

1. Phenomenon

Inner diameter surface or outer diameter surface slip, causing mirror or discoloration, sometimes stuck

2. Reason

1) Insufficient interference at fit

2) The sleeve is not fastened enough

3) Abnormal temperature rise

4) Excessive load

3. Measures

1) Re-study the amount of excess profit.

2) Study conditions of use

3) Check shaft and bearing housing accuracy