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Home>Bearing knowledge>INA bearing removal; inspection and damage identification
INA bearing removal; inspection and damage identification
1, INA bearing removal and disassembly of the INA bearing overhaul; first record the INA bearing appearance; recognize the residual amount of lubricant; after sampling to view the lubricant; wash INA bearing. As a scavenger; generally use gasoline, fire oil.
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Removal of the INA bearing removed; coarse removal and fine cleaning; do not leave in the container; first put the metal mesh bottom; so that the INA bearing does not directly touch the container dirt. When coarse removal; Dirty rotation; damage to the INA bearing rolling surface; should be paid attention to. In the rough removal of oil; use brush to remove grease, adhesive; after cleaning; turn into fine washing.
Fine washing; the INA bearing is rotated while removing the oil; while carefully removing. Others; the oil should always be kept clean.
2. Inspection and discrimination of INA bearing In order to judge whether the INA bearing can be reused after being disassembled; to check after cleaning the INA bearing; carefully check the condition of the raceway surface, the rolling surface, the cooperation surface, and the wear condition of the cage. INA bearing clearance and the presence or absence of damage to the scale accuracy, abnormal. Non-detached small ball INA bearing; use one hand to support the inner ring level; rotating outer ring to recognize the circulation.
Tapered roller bearings and other INA bearings; can be viewed from the rolling surface of the roll and outer ring.
Large INA bearings can not be rotated by hand; pay attention to the appearance of the rolling body, the raceway, the cage, the rib surface, etc.; the higher the importance of the INA bearing, the more stable it needs to be viewed.
Whether it can be re-used; it is to consider the degree of INA bearing damage, mechanical properties, importance, working conditions, and the time to the next inspection. However, if there are the following shortcomings, it can no longer be used; it is necessary to replace it. INA 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) INA bearing sealed with grease; damage to the seal or dust cover is significant.
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