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Spindle bearing lubrication
1. The order of filling grease after bearing cleaning
Different grease filling methods may cause unstable temperature rise during initial running-in operation, abnormal temperature rise, long initial running-in time, or even burns, etc. Phenomenon. Therefore, it must be properly filled with appropriate grease and appropriate filling amount according to the conditions of use.
(1) Confirmation items before filling
Confirm that there is no residual foreign matter inside the bearing. It is recommended that bearings for high-speed spindles should be cleaned, degreased, and then filled with grease.
For other applications, it is also recommended to remove the anti-rust oil adhering to the inside of the bearing first.
(2) When filling with grease
In order to fill the proper amount of grease, it is recommended to use a grease injector. It is best to use a greaser that uses a readable fill number.
(3) Grease filling amount
Recommended value for precision bearing grease filling amount:
Angular contact ball for high-speed spindle Bearings, 15%±20% of the space volume
Cylindrical roller bearings for high-speed spindles, 10%?% of the space volume
Ball bearings for motors, 20%~ of the space volume -30%
2. Grease filling method for ball bearings
(1) Fill grease evenly between the balls. In the case of a phenolic resin cage guided by an outer ring, it is recommended to apply grease thinly to the guide surface of the cage.
(2) Rotate the bearing by hand, so that the grease evenly enters the raceway surface, the e part of the cage, between the balls, the guide surface, etc., so that the lubrication Grease fills the inner space of the bearing.
3. Grease filling method for cylindrical roller bearings
(1) Apply 80% of the filling amount of grease evenly on the rollers. the scroll surface of the child. At this time, it is recommended not to apply too much grease to the inner side of the cage. The grease inside the cage is difficult to spread in the initial running-in stage, which will increase the temperature and prolong the running-in time.
(2) The grease on the raceway surface of the roller will spread to the end surface of the roller, the contact part between the cage and the roller, and the entrance of the pocket. Distribute the grease evenly throughout the bearing.
(3) Apply 20% grease evenly and thinly on the raceway surface of the outer ring that will be installed into the bearing housing.
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