Care and Maintenance of Bearings
CAT. No. 3017／E
NTN
1. Introduction ………………………………………………………………………3
2. Inspection of Bearings …………………………………………………………3
3. Inspection When Machine is Running…………………………………………3
3. 1 Bearing Temperature ……………………………………………………3
3. 2 Operating Sounds of Bearing ……………………………………………3
3. 3 Vibration of Bearing ………………………………………………………5
3. 4 Lubricant Selection ………………………………………………………5
3. 5 Relubrication ………………………………………………………………5
4. Check of Bearings after Operation ……………………………………………7
5. Bearing Failures and Solutions ………………………………………………7
5. 1 Flaking………………………………………………………………………8
5. 2 Peeling ……………………………………………………………………10
5. 3 Spalling ……………………………………………………………………11
5. 4 Smearing …………………………………………………………………12
5. 5 Wear ………………………………………………………………………13
5 .6 Speckles and Discoloration ……………………………………………14
5. 7 Indentations ………………………………………………………………15
5. 8 Chipping …………………………………………………………………16
5. 9 Cracking …………………………………………………………………17
5.10 Rust and Corrosion ………………………………………………………18
5.11 Seizing ……………………………………………………………………19
5.12 Fretting and Fretting Corrosion …………………………………………20
5.13 Electrical Pitting …………………………………………………………21
5.14 Rolling Path Skewing ……………………………………………………22
5.15 Damage to Retainers ……………………………………………………23
5.16 Creeping …………………………………………………………………24
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CareAndMaintenance_en.pdf
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