1 Electric spindleThe errors mainly include roundness error, coaxiality error, and perpendicularity error of the bearing surface.

2. The axis error of an electric spindle includes roundness error of sliding bearing holes or rolling bearing raceways, ripple error of sliding bearing holes or rolling bearing raceways, shape and size error of rolling bearing rollers, perpendicularity error of bearing positioning end face and axis, parallelism error of bearing end face, bearing clearance, and cutting force deformation.

3. The main reasons affecting the precision of electric spindle rotation are bearing wear, shaft and contact surface wear.

In order to ensure the normal operation of the electric spindle while maintaining accuracy, it is necessary to minimize the wear rate of bearing related parts as much as possible, and the main way to reduce wear is lubrication. The bearings are well lubricated and have good lubrication and cooling effects. Therefore, choosing a reasonable and correct lubrication method is an important condition for ensuring the normal operation of the electric spindle.