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Bearing removal, overhaul and discrimination
Source: China Bearing Network Time: 2014-08-18
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Removal of the removed bearing; coarse removal and fine cleaning; do not leave in the container; first put the bottom of the metal mesh; make the bearing not directly touch the dirt of the container. When coarse removal; if the bearing is dirty Rotation; damage to the bearing rolling surface; should be paid attention to. In the rough removal; use the brush to remove the grease, adhesive; after the general clean; turn into the fine wash. Fine wash is to rotate the bearing in the cleaning liquid; Clear the ground. Others; always remove the oil and keep it clean.
2. Inspection and discrimination of the bearing In order to judge whether the unrolled bearing can be reused, it should be viewed after the bearing is cleaned; carefully check the raceway surface, the rolling surface, the condition of the cooperation surface, the wear condition of the cage, and the bearing tour. The addition of gaps and the presence or absence of damage to the scale accuracy, abnormality. Non-detached small ball bearings; the inner ring is supported horizontally with one hand; the outer ring is recognized as being in a state of circulation rotation.
Tapered roller bearings and other separate bearings; can be viewed on the rolling surface of the roll and outer ring.
Large bearings cannot be rotated by hand; pay attention to the appearance of the rolling body, raceway surface, cage, ribs, etc. The higher the importance, the more important it is to look at it.
Whether it can be re-used; it is to consider the degree of bearing damage, mechanical properties, importance, working conditions, and the time to the next inspection. However, if the following shortcomings are used, it can no longer be used; it is necessary to replace the new bearing:
(a) cracks or gaps in any of the inner ring, the outer ring, the roll body, and the cage,
(b) Cracking on any of the ferrule and the roll body,
(c) Significant jams on the raceway, ribs, and rollovers,
(d) The cage is significantly worn; perhaps the rivets are significantly loose,
(e) There is rust and injury on the raceway surface and the roll body.
(f) There are severe indentations and marks on the raceway surface and the rolling body.
(g) There is significant creep in the inner diameter surface of the inner ring or the outer diameter surface of the outer ring.
(h) The discoloration due to heat is remarkable,
(i) Bearings sealed with grease; damage to seals or dust caps is significant.
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