With the rapid development of digital control technology, "complex, high-speed, intelligent, sophisticated, environmentally friendly" has become an important industry trend of technological development. Among them, a high-speed processing can improve the effectiveness of treatment, shortening the processing cycle. This requires assembly of the spindle and its components on the needs of high speed machining. Currently, the spindle CNC machine tool focusing on ball bearings angular contact, cylindrical roller bearings, ball bearings angular contact ball bearings and tapered roller bearings and other types are defined by four structures.
With a high spindle speed CNC machine tools for the development of ceramic materials (mainly referring to Si3N4 ceramics) because of the low density, high modulus of elasticity, coefficient of thermal expansion, wear resistance, high temperature resistance, corrosion resistance and other excellent qualities, is whether the production of high precision equipment ideal storage. Ceramic bearings are applied more broadly, to the difficult process of ceramic materials, ceramic precision bearings and more for the rolling element is ceramic, chrome steel inner and outer rings are a mixture of ball bearings ceramic.
As a ball screw transmission components effective and sensitive, in addition to the high precision screws, nuts and ball, but also takes care of the axial stiffness, friction, operation and high precision bearings. Ball bearings in the last two lines of thrust angular contact ball bearings, tapered roller bearings, needle bearings and roller thrust bearings and ball bearings are used. Currently, the support ball screw is the contact angle of the most commonly used 60 ° ball bearings angular contact ball bearings single row, but the accuracy is there, the machine is equipped with the general appearance of the tree, its needs and use the same camp, and general mechanical transmission can not meet the requirements of strength and durability, speed does not exceed the Angular Contact Ball Bearing are specified.
