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. After cleaning and selecting the appropriate lubricating oil, how to lubricate the spindle bearing of the machining center? Find out for you with this article. 1. The order of filling grease after bearing cleaning; The different filling methods of grease will cause unstable temperature increase during the running-in operation of the spindle bearing of the machining center in the early stage, abnormal temperature increase, long running-in time in the early stage, and even burns. Therefore, it is necessary to select the appropriate grease and reasonable filling amount to complete the proper filling according to the application standard. (1) Determination matters before filling; Make sure that there is no dirt left inside the spindle bearing of the machining center. It is suggested that the spindle bearings of machine tools should be cleaned, de-oiled, and then filled with grease. In other applications, it is also best to remove the rust inhibitor adhering to the inside of the bearing first. (2) When filling with grease; In order to fill with proper grease, it is recommended to use a greaser. It is best to use a greaser that applies a readable fill number. (3) Grease filling amount; the optimal value of grease filling amount: precision angular contact ball bearing, 15% ± 20% of space capacity; cylindrical roller bearing, 10% of space capacity; ball bearing, 20% of space capacity ~-30%. 2. Oil and grease filling method of ball bearing; (1) Fill grease evenly in the middle of each ball. If it is a urea-formaldehyde resin cage that is correctly guided on the outside, it is recommended to apply grease thinly to the correct guiding surface of the cage. (2) Rotate the bearing with your hands, so that the grease evenly enters the dovetail guide rail surface, the inside of the cage, the middle of each ball, the correct guide surface, etc., so that the grease fills the bearing indoor space. 3. Grease filling method for 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, it is not necessary to wipe too much grease on the inner side of the cage. The grease on the inner side of the cage is difficult to spread in the early run-in operation, which will increase the temperature rise and increase the run-in operation 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) Apply 20% of the grease evenly and thinly to the outer raceway surface that will be installed into the bearing housing. Co., Ltd. is a machining center spindle bearing manufacturer specializing in the design, development, manufacturing and sales of ball bearings, precision angular contact ball bearings, ball screw bearings, electric spindle bearings, lathe spindle bearings, and machine tool bearings. Professional bearing manufacturing for 33 years !