Bearings after installation, in order to check whether the correct installation, check the run. Small mechanical can rotate with the hand, to confirm whether smooth rotation. Check project caused by foreign body, scars, indentation failure due to installation, the installation of dealing with bad moment is not stable, because the gap is too small, the installation error, seal friction torque is too big, and so on. If there is no abnormal can start operation.
Large mechanical manual rotation, so the light starts immediately cut off the power and the machine idle, check whether there is vibration, noise, rotating parts contact, etc., confirmed after no abnormalities, power operation Site Of SKF Bearings http://www.nskbearings-hk.com/news.html .
Dynamic operations, from the beginning of no-load speed, slowly the rated operating conditions. Test run check project, whether there is abnormal sound, spherical ball bearing temperature, lubricant leakage or discoloration, and so on. If discovery is unusual, should immediately stop and check the machine, when you need to remove the bearing inspection.
Bearing temperature, according to the bearing of the external temperature on average. But the use of oil hole directly measuring the temperature of the bearing outer ring is more accurate. Bearing temperature, the operation begins to increase gradually, usually 1 ~ 2 hours after the temperature stability. If the bearing installation, the temperature will rise sharply, abnormal high temperature. Reasons such as lubricant, bearing gap is too small, too many bad installation, excessive friction sealing device, such as high speed, the choice of methods of bearing structure, lubrication and so on is also wrong reason.
The rotation of the bearing test with a stethoscope sounds, such as strong noise, metal such as vision, irregular note that exception. Its reason has poor lubrication, shaft or precision bearing, bearing damage, foreign invasion and so on.
Under the action of transient high temperature of steel surface and the oxygen in the air, rising into extremely thin (20 ~ 30 nm) iron oxide thin layer. It is worth noting that the oxide layer thickness and surface grinding metamorphic layer corresponding relationship between the total thickness of the test result. This shows that the thickness of the oxide layer, an important symbol of the grinding process is directly related to the quality of grinding.
1, you must first real spherical ball bearing, if you buy a fake bearings how can live longer.
2, before the installation of bearings, the first thing to check whether the bearing is short of oil, clean, then check that the installation of the machine parts, determine the good and clean grease, bearing installed correctly.
3, bearing test, after installation, trial run, run for a period of time to check found nothing abnormal, the bearing can be normal use.