The previous article taught you how to clean the spindle bearing of the machining center, and how to choose the lubricating oil for the spindle bearing of the CNC lathe. Then, after cleaning and selecting the appropriate lubricating oil, how to lubricate the spindle bearing of the machining center? Answer it for you through this article. 1. The sequence of filling grease after bearing cleaning; Different grease filling methods will cause unstable temperature rise, abnormal temperature rise, long run-in time in the early stage, and even burns during the running-in operation of the spindle bearing of the machining center in the early stage. Therefore, it is necessary to select the appropriate grease and a reasonable filling amount according to the application standard to complete the proper filling. (1) Determination before filling; Make sure that there is no dirt left inside the spindle bearing of the machining center. It is recommended that for machine tool spindle bearings, they should be cleaned, degreased, and then filled with grease. In other applications, it is also best to remove the anti-rust agent adhering to the inside of the bearing. (2) When filling with grease; In order to fill with proper grease, it is recommended to use a grease injector. It is best to use a greaser with a readable fill number. (3) Grease filling amount; the best value of grease filling amount: precision angular contact ball bearings, 15% ± 20% of the space capacity; cylindrical roller bearings, 10% of the space capacity; ball bearings, 20% of the space capacity ~-30%. 2. Oil and grease filling method of ball bearings; (1) Fill grease evenly in the middle of each ball. If it is a urea-formaldehyde resin cage guided on the outside, it is recommended to apply a thin layer of grease to the guiding surface of the cage. (2) Rotate the bearing by hand, so that the grease enters the dovetail guide surface, the inside of the cage, the center of each ball, the guiding surface and other places evenly, so that the grease fills the bearing space. 3. The grease filling method of cylindrical roller bearings; (1) Apply grease to 80% of the filling amount, and evenly apply it to the rolling surface of the roller. At this time, do not apply too much grease to the inner side of the cage. The grease on the inner side of the cage is difficult to spread during the early run-in operation, which will increase the temperature rise and increase the run-in time. (2) The grease on the roller raceway surface may spread to the inner hole of the roller, the contact position between the cage and the roller, and the entrance of the pocket, so that the grease is evenly distributed to the entire bearing. (3) Spread 20% grease evenly and thinly on the surface of the outer raceway to be installed into the bearing seat. Co., Ltd. is a machining center spindle bearing manufacturer specializing in ball bearings, precision angular contact ball bearings, ball screw bearings, electric spindle bearings, lathe spindle bearings, machine tool bearings, design, development, manufacturing and sales. Professional bearing manufacturing for 33 years ! (/wfzjnc.html) Related articles: How to clean the spindle bearing of the machining center (the most complete solution) How to choose the lubricating oil for the spindle bearing of the CNC lathe?
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