Apply a little bit of lubricant to the friction between the two fingers. If there is any contaminant, it can be felt. Or apply a lubricant on the back of the hand and then check the light.
Thrust ball bearings lubricated with oil should be refilled with fresh oil and allowed to rotate at low speed for a few minutes if the old oil is drained. As much as possible, allow the oil to collect residual contaminants and then vent the oil. Note: It is best to filter the oil before use.
1) Bearing design parameters: including the number of bearing rolling elements, ferrule wall thickness and clearance.
2) Manufacturing error of bearing parts: including NTN bearing raceway and rolling element surface roughness, ridge degree and roundness difference. A large number of experimental studies have shown that the influence of waviness on bearing vibration is dominant, while the influence of surface roughness and roundness is relatively small.
3) Bearing working conditions: During the operation of the thrust ball bearing, the load, speed and lubrication conditions have the greatest influence on the bearing vibration.
4) Bearing installation parameters: the bearing and the shaft and the bearing seat, the deflection during installation and other factors also affect the vibration of the bearing.
The use of grease-lubricated thrust ball bearings in the replacement of grease, the use of the cutter should avoid the contact of cotton with any part of the NTN bearing. Since these residual fibers may be wedged between the rolling elements and cause damage, especially the application of small bearings requires attention to this problem.
When inspecting NTN bearings, never expose the thrust ball bearings to contaminants or moisture. If the work is interrupted, cover the machine with a piece of oil-paper plastic or similar material.
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