After a long technical summary of the technical staff, bearing ring for the following 27 reasons, there may be a lot of we do not have to encounter, the later will slowly fill.
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Mixed with sand or carbon particles bearing 1, to play the role of abrasive
2 bearing in the water, acid or paint and other dirt, corrosion;
3 bearing clearance is too small (with inappropriate choice);
4 the oil or grease varieties are not selected;;
5 (the level is too low, lack of lubrication oil or grease leakage through seal);
6 bearing is a hole in the seat of a hole (a round of the hole is not good, or a hole is not straight);
7 bearing seats at the bottom of the pad is uneven (leading to the seat hole deformation and even cracks);
8 bearing seat hole in the debris (residual debris, dust, etc.);
9 sealing ring eccentricity (meet the adjacent parts and friction);
10 additional load bearing (bearing axial - tight, or a shaft with two fixed end bearing);
11 axis of the thermal elongation of the large (shaft bearing static and axial load);
12 bearing clearance is too small, too tight (rotating locking sleeve is screwed too much);
13 bearing noise (the end of the roller or ball of the ball);
With the loose 14 bearings and shaft (shaft diameter is too small or not screwed tight sets);
15 shaft shoulder is too large (bearing the seal of the bearing and friction);
16 holes in the shoulder is too large (to the bearing of the seal was distorted);
17 labyrinth seal ring of the gap is too small (with the shaft friction);
18 the tooth of the lock washer is bent (touch the bearing and friction);
19 the position of the oil rejection ring is not appropriate (the flange cover and friction);
20 steel balls or rollers have a press hole (which is caused by a hammer tapping on the bearing);
21 bearing noise (external vibration interference);
22 bearing heat distortion and deformation (using the spray gun heating caused by the bearing);
The 23 axis is too thick to make the actual tight match (caused by bearing temperature is too high or noise);
24 bearing noise (bearing fretting wear).
The 25 bearing seat hole diameter is too large, too loose with the actual (high temperature bearing outer ring - slip);
The 26 bearing seat hole enlargement (bearing hole of nonferrous metals are stretched, or due to thermal expansion and change);
27 hole diameter is small (caused by high bearing temperature).