Machine tool spindle bearings

Machine tool spindle bearing is the spindle bearing of precision machine tools and similar equipment, it can ensure the precision of the work of precision machine tools and the use of performance, the correct configuration of the machine tool spindle bearing refers to the combination of bearing types and front and rear bearing arrangement, different configurations determine the machine tool spindle different bearing capacity, operating speed, stiffness, temperature rise and service life, especially the impact on the stiffness and temperature rise is more significant, so the spindle bearing should be configured according to the requirements of the working characteristics of the machine tool.

The purpose of the grinding operation is to make the bearing in the formal into the angle before and its roller, raceway for grinding, so that it has good contact conditions, to maintain good contact accuracy of the bearing, to avoid the bearing just started high-speed heavy load use when the roller, raceway damage, so as to improve the service life of the bearing and precision, because the tapered roller bearing is not completely rolling contact, so the roller end face and the inner ring shoulder between the sliding. If the contact conditions are not good, it is easy to have bite damage. Therefore, the spindle bearing is the spindle bearing of precision machine tools and similar equipment, which can ensure the working accuracy and performance of precision machine tools.

The accuracy of bearings used in machine tool spindles should be ISOP5 or above (P5 or P4 for ISO accuracy level, usually from low to high (PO, P6, P 5, P4, P2), and for CNC machine tools, machining centres and other high-speed, high-precision machine tool spindle bearings, should be selected ISOP4 or above. Spindle bearings include angular contact ball bearings, deep groove ball bearings, tapered roller bearings, two-way thrust angular contact ball bearings, double row cylindrical roller bearings and tapered roller bearings as well as other types.