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Bearing after installation, to check for proper installation, operation check. Small machinery can be rotated by hand to confirm whether it rotates smoothly. Check project are caused by foreign bodies, scar, indentation to seize up, by poor installation, mounting bad moment of instability arising from processing, due to the clearance is too small, installation error, caused by seal friction torque is too large, and so on.
Removed maintenance of FAG bearings, bearing first record appearance, confirm that the residual amount of lubricant, after checking the lubricant used for sampling, wash bearings. As a cleaning agent, ordinary gasoline, kerosene.
Remove bearing cleaning, cleaning rough and fine precision cleaning, respectively, in the container, put metal mesh on the bottom so that bearing has no contact with the dirt container. Coarse cleaning, rotate the bearing with dirt will damage bearing rolling surface, should be noted. Coarse cleaning oil, use a brush to remove grease, adhesive material, after a generally clean, fine wash.
Intensive wash, is in cleaning oil side the bearing rotated, while carefully cleaned. In addition, clean oil should always be kept clean.
In order to determine whether removing bearings can be used again, to check after bearing wash, carefully check the Raceway surface, rolling, status of the mating surfaces, cage wear, increased bearing clearance and with or without injury on the dimensional accuracy declined, exceptions. Non-separation-ball bearing, inner ring support level with one hand, rotate the outer ring to confirm fluency.
Separation-bearing bearings, rolling element and the Raceway in the outer ring can be respectively checked, larger bearings cannot rotate, check rolling element and the Raceway, cage, sidewall surface appearance, bearing the importance of ever higher, ever be inspected carefully.
Large machinery cannot be rotated manually, so no load starting immediately after cutting off power, machine idling, check there is no vibration, noise, and is in contact rotating parts, and so on, after confirmed without exception, into the engine running.
Power operation, starting from no-load speed, slowly raised to the specific conditions of rated operation. Things to check for in the commissioning, with abnormal variations in sound, bearing temperatures, lubricant leakage or discoloration, and so on. If you find an exception, should immediately suspend the operation, check the machine, if necessary, to remove the bearings check.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4936 NTN | 180 | 250 | 69 |
| NNU4934K NTN | 170 | 230 | 60 |