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Coping with "NSK bearing load failure damage discrimination"
Source: China Bearing Network Time: 2014-07-23
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The primary responsibility for the analysis of the loss of imported bearings is based on a number of sets of materials, analytical data and methods of failure; to identify the primary factors that constitute the failure of the bearing; to provide an improved method of alignment; to extend the life of the bearing; Prevent sudden and early failure of the bearing.
The metallurgical quality of NSK bearing materials used to be the primary factor affecting the early failure of imported bearings. Following the advancement of metallurgical technology (such as vacuum degassing of bearing steel); the quality of raw materials has been improved. The quality of raw materials has been accounted for in the analysis of bearing failure. The proportion has been clearly reduced; but it is still one of the primary influencing factors of bearing failure. Whether the selection of materials is stable or not is still an essential element for bearing failure analysis.
Smoothness is very important; not only is it aimed at the imported bearings; it is also aimed at all the bearings. However, the purchaser should pay attention to it; the bearing should not add too much smooth grease. Then it is to replace the smoothing agent of NSK bearing. After rinsing old oil; if it is possible; it should be refilled with fresh oil and allowed to rotate at low speed for a few minutes. The oil can be used to collect residual contaminants; then the oil is removed. Smooth bearings in the replacement of grease; the use of the cutter should prevent the cotton material from touching any part of the outer spherical bearing. Because these residual fibers can be wedged between the rolling elements and form damage; especially It is the use of small bearings that need to pay attention to this problem.
If the purchaser carefully observes the working track; it will know that it only bears the radial load; accepts a large axial load; accepts the moment load; or has pole rigidity inequality on the bearing housing. Can check whether the bearing can be added Unexpected load and device errors can be too large; and become a clue to the cause of damage to the outer spherical bearing.
Whether the NSK bearing can be used or not; mainly consider the degree of bearing damage, mechanical properties, importance, working conditions, and the time to the next inspection. If there are the following shortcomings, it can no longer be used; it is necessary to replace the new bearing. There are cracks or gaps in any of the ring, outer ring, roll body and cage.
1. The NTN bearing raceway surface and the rolling body have severe indentations and marks.
2. There is crack on any one of the ferrule and the rolling body.
3. The discoloration formed by heat is obvious.
4. There are obvious card injuries on the rolling track surface, the ribs and the rolling body.
5. There is obvious creep in the inner diameter surface of the inner ring or the outer diameter surface of the outer ring.
6. NSK bearing sealed with smooth grease; the damage of the sealing ring or dust cover is obvious.
7. There is rust on the raceway surface and the rolling body; there is injury.
8, the cage wear is obvious, perhaps the rivet is obviously relaxed.
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1. Technical standard: BS EN 10202, DIN EN 10203, GB/T2520 , JIS G3303
2. Steel type: MR, SPCC
3. Thickness: 0.115 - 0.50 mm
4. Width: 600 - 1050 mm
5. Length: 600-1200mm
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