The spindle bearing of the machining center is a key component of the machining center. If it is not cleaned for a long time, it will directly affect the speed, rigidity, temperature rise and noise of the machining center and other parameters, thereby affecting the machining quality of the workpiece. In order to maintain the excellent processing capacity of the machining center, the bearings of the machining center must be cleaned regularly. The cleaning of the spindle bearing of the machining center will also affect its working state and service life. Many CNC machining center failures are caused by improper cleaning of the bearing, so enough attention should be paid to the cleaning of the bearing. The cleaning points of the spindle bearing of the machining center are briefly described as follows: 1. Keep hands clean and dry: When the spindle bearing of the machining center is taken out of the package, the operator's hands should be kept clean and dry, because the sweat on the hands will cause rust, Gloves can be worn if necessary. 2. Guarantee good lubrication effect: The spindle bearing of the machining center should be greased and lubricated immediately after being taken out. The greased bearing should be installed without pollution immediately after being taken out. 3. The package should be sealed: The spindle bearing of the machining center can only be taken out of the original package for cleaning before assembly. After removing several sets of bearings from the volatile corrosion inhibitor sealed multi-piece bearing package, the package should be sealed immediately, because the protective gas of the VIC paper can only be maintained in the sealed package. 4. Correct cleaning: greased bearings cannot be cleaned before assembly, while non-greased precision bearings must be cleaned before assembly. After cleaning, they should be dried and immediately put on anti-rust oil or grease to avoid rust. Machining center spindle bearing features: 15° and 25° contact angle design is adopted to provide certain axial support; paired working mode meets rigid output under different load requirements; high-precision technology ensures stable precision performance at high speed.