1, peeling burns

2, crack defects

3, cage damage

4. Scratching and carding

5, rust and corrosion

6, abrasion

7, electrical corrosion

8. Indentation Bump

9. Creep

Below we use a chart to quickly, accurately, and concisely analyze the causes and solutions of the problem, so that in the application process helpful for you.

items

phenomenon

cause

measures

peeling

running surface peeling

Obvious convex and concave shape after peeling

Excessive load and improper use

Incorrect installation

Inaccuracy of shaft or bearing box

Too small clearance

Foreign matter intrusion

Rust occurs

Hardness drop due to abnormally high temperature

Re-research and use Condition

Reselect bearing

Reconsider clearance

Check shaft and housing machining accuracy

Research around bearing design

Inspect the installation method

Inspect the lubricant and lubrication method

Burn

The bearing heats up and discolors, and the burn cannot rotate

Too small clearance (including deformation part too small)

Insufficient lubrication or improper lubricant

Too large load (too large preload)

Roller deflection

Set proper clearance (increase clearance)

Check the type of lubricant to ensure the amount of injection

Check the conditions of use

Prevent positioning errors

Check the design around the bearing (including bearing heating)

Improve the bearing assembly method

Cracks

Defects

Partial notches

and cracks

Excessive impact load

Excessive interference

It is relatively Large peeling

Friction cracks

Poor installation side accuracy (corner roundness is too large)

Poor use (with a copper hammer, large foreign objects are stuck)

Check usage conditions

Set proper interference and check material

Improve installation and usage methods

Prevent friction cracks (check lubricant)< /p>

Check the design around the bearing

broken cage

loose or broken rivets

broken cage

moment load Too large

High-speed rotation or frequent rotation speed changes

Poor lubrication

Foreign objects stuck in

Large vibration

Poor installation (installed in a tilted state)

Abnormal temperature rise (resin cage)

Check operating conditions

Check lubrication conditions

Re-study cage selection

Pay attention to bearing usage

Research shaft and bearing housing rigidity

Scratches

Seize

The surface is rough, accompanied by micro-dissolving

The scratch between the rib of the ring and the end face of the roller is called Seizing

Poor lubrication

Foreign matter intrusion

Roller deflection caused by bearing tilt

Rib caused by large axial load The oil is cut off on the surface

The surface roughness is large

The rolling element sliding is large

Re-study the lubricant and lubrication method

Check the operating conditions

Set appropriate preload

Enhanced sealing performance

Normal use of bearings

rust

corrosion

Partially or completely rusted on the surface

rusted in the form of rolling element tooth pitch

poor storage condition

improper packaging

Insufficient rust inhibitor

Intrusion of moisture, acid solution, etc.

Take the bearing directly by hand

Prevent rust during storage

Strengthen the sealing performance

Regularly check the lubricating oil

Pay attention to the use of the bearing

Abrasion

The mating surface produces red rust-colored wear particles

Insufficient interference

Small bearing rocking angle

Insufficient lubrication (or in a non-lubricated state)

Unsteady load

Vibration during transportation

Check the interference and lubricant coating state

The inner and outer rings are packaged separately during transportation, and pre-pressure should be applied if they cannot be separated

Re-select the lubricant

Re-select the bearing

Wear

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

Lubricant mixed with foreign objects

Poor lubrication

Roller deflection

Check the lubricant and lubrication method

Strengthen the seal Performance

Prevention of positioning errors

Electrical corrosion

The rolling surface has crater-like pits, and further development is corrugated plate-like

The rolling surface is electrified

The current bypass valve is made

Insulation measures are taken to prevent the current from passing through the inside of the bearing

Indentation

Bump< /p>

Intrusion of solid foreign objects, or surface pits and scratches caused by impact

Intrusion of solid foreign objects

Intrusion of release sheets

Shock caused by poor installation, falling off

Installation in a tilted state

Improve installation and use methods

Prevent foreign matter from mixing

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

Creep

The inner diameter surface or outer diameter slips, causing mirror surface or discoloration, and sometimes stuck

Insufficient amount of interference at place

Insufficient tightening of sleeve

Abnormal temperature rise

Excessive load

Restudy Interference

Research Operating Conditions

Check Shaft and Housing Accuracy