Because of the metal material fatigue, irregular shedding of SKF bearing rolling track and ball surface debris if mixed in lubricating grease, make the noise increases, the ball is in sliding state, resulting in bearing radial clearance increases, the axial and radial end allowed deflection value increases 2~3 times. Including the determinants of bearing fatigue level: load, speed, the motor air gap, end cap type, the toughness of the material, quality grease grease adding quantity.

1, the bearing temperature is too high: institutional operation, installing SKF bearing parts to allow a certain temperature, when the hand touch body shell, should not feel hot to normal, instead it indicates that the bearing temperature is too high.

Causes of bearing temperature are: lubricating oil quality does not meet the requirements or deterioration, lubricating oil viscosity is too high; preloaded mechanism ( spaces ); preloaded bearing; bearing race rotation on the shaft or shell; overload; stainless steel bearing retainer or rolling body fracture etc..

2, SKF bearing noise: rolling bearing minor operation noise is allowed in the work, if the sound is too large or unusual noise or sound, it indicates that the bearing failure.

Causes noise rolling bearings: 1 ) is more complex, bearings, with surface wear. Due to the wear, destroyed the fit between bearing and housing, bearing and shaft, causes the axis deviates from the correct location, the shaft noise in high speed motion. When the stainless steel bearing fatigue, its surface metal flake, also bearing radial clearance increases the noise. 2 ) insufficient lubrication of the bearing, the formation of dry friction, as well as bearing broken produces abnormal sound. 3 ) after bearing wear loose, loose cage damage, also can produce noise SKF bearing damage. Rolling bearing inspection when disassembled, can determine the fault and damage causes of bearing according to the damage of bearing.

3, the raceway surface metal flake: bearing rolling element and the inner, outer ring raceway surface are subjected to cyclical fluctuation load, resulting in periodic changes of contact stress. When the stress cycle number reaches a certain value, will produce fatigue spalling in the rolling body or the inner, outer ring raceway working face. If the bearing load is too large, will exacerbate this fatigue. In addition, the bearing is not being installed, shaft bending, also have a raceway spalling phenomenon. Raceway on Bearing fatigue peeling can reduce the running accuracy of the shaft, the mechanism of vibration and noise.

4, bearing burn: burn bearing raceway, the rolling body temper. Burn the reason is the general lack of lubrication, lubricating oil quality does not meet the requirements or deterioration, as well as the bearing assembly too tight.

5, the plastic deformation: pits uneven appearance of raceway and roller contact surface of SKF bearing, the bearing to produce plastic deformation. The reason is bearing in static or impact loading, local stress more than material yield limit of the working surface, which generally occurs on the low speed rotation of the bearing.

6, bearing ring crack: causes of bearing ring crack may be bearing too tight, loose bearing foreign or inner ring bearing tolerance, deformation, surface processing and installation of bearing failure.

7, cage fragmentation: the reason is lack of lubrication, rolling crush, seat tilt.

8, to maintain the metal adhesion frame in the rolling body, may cause is the rolling was stuck in a cage or lack of lubrication.

9, ring raceway of serious wear: may be in the race into the foreign body, lack of lubricating oil or lubricating oil is not suitable.

The reason is a serious lack of grease or oil dry aging. Because of the high-speed motor friction heat, resulting in bearing high temperature oxidation discoloration, the performance of the SKF bearings ball, cage, inner ring and shaft neck, brown or blue.