For 37 years, we have been focusing on the application and production of bearings in various scenarios that require high-speed and precise operation such as machining centers. We summarize the assembly steps of the spindle bearings of the machining centers as follows: ① The tolerance between the spindle bearing and the spindle journal exceeds 0.002～0.005mm, which can be passed through The measured value of the main shaft and the main shaft bearing can be achieved by grinding; ② The coating SBU15 lithium-based grease before the bearing installation is 1/3 of the bearing clearance; ③ Before the main shaft bearing of the machining center is installed, the main shaft should be vertically fixed on the bracket of the operation platform The high point of the taper hole of the spindle corresponding to the shaft runout should be determined according to the mark provided by the machine, and the high point of the inner ring of the bearing should be aligned with the mark of the outer ring of the bearing; ④ During installation, we need to use a special heating tool for the bearing to heat, and the heating temperature should be adjusted to 50 ℃; ⑤ Install the bearing and spacer on the main shaft according to the marked positions, and tap the bearing and spacer axially with the mounting sleeve in order to ensure that the joint end faces of the bearing are in close contact; ⑥ When installing the spacer, not only ensure that the spacer The oil and gas holes of the sleeve itself are not blocked, and the main shaft sleeve must be installed on the premise that the oil and gas lubrication holes of the spacer and the sleeve are in the correct position; ⑦ Install the main shaft nut; ⑧ Finally, adjust the rotation accuracy. With 37 years of experience in the field of electric spindle bearings for high-speed machining centers, we are committed to providing matching application solutions for angular contact ball bearings for various machining centers! The torque is accurate, in order to turn stable!