As the basis of machine tool spindle bearing accessories, its performance directly affects the speed of the machine, rotary accuracy, rigidity, chatter vibration cutting resistance, noise, temperature rise and thermal deformation, etc., which affect the precision and surface quality of machining parts, etc.Therefore, high-performance machine tools must be of high performance bearing.
The precision of the rolling bearing generally divided into P0, P6, P5, P2 and P4 five grades, should be applied to precision machine tool spindle bearing precision P5, and governments at higher levels for nc machine tools and machining center such as high speed, high precision machine tool spindle bearing, the need to choose P4 ultra precision bearing and governments at higher levels.
Machine tool spindle bearing usually include deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings bearing company, two-way thrust angular contact ball bearing, tapered roller bearing and thrust bearing and so on six types of structures.
With the rapid development of numerical control technology, the "complex, high-speed, intelligent, precise, environmental protection" has become a main trend in today's machine tool industry technology development.Among them, the high speed machining can effectively improve the machining efficiency of machine tools, machining of shortening the cycle.This requires a machine tool spindle should meet the requirements of high speed machining and its related components.At present, the nc machine tool spindle bearing basically qualified in angular contact ball bearings, cylindrical roller bearings, two-way thrust angular contact ball bearings and tapered roller bearings and so on four types of structure.