The areas where angular contact bearings need to be used on machine tools are usually the three positions of the main shaft, ball screw and general rotating shaft, that is, machine tool main shaft bearings, ball screw bearings, and transmission shaft bearings. Angular contact bearings for machine tool spindles are the basic accessories of machine tools. The performance of spindle bearings is directly related to several characteristics of machine tools, such as speed ratio, noise, anti-vibration vibration, rotation accuracy, processability, temperature rise, stiffness and thermal expansion, etc., which affect processing. Parts accuracy, surface quality, etc. Therefore, a machine tool with excellent performance must be suitable for angular contact bearings with excellent performance. For machine tool spindles, the accuracy of angular contact bearings is very important. The accuracy of angular contact bearings in machine tool spindle applications is generally divided into five levels: P0, P6, P5, P4 and P2. The bearing accuracy used on high-precision machine tool spindle bearings should be It is P5 and above, but the spindle bearings used in fast and precision machining machine tools such as CNC machine tools and CNC machining centers need to use P4 and above precision bearings. The bearings used on the main shaft of machine tools are generally classified into the following types according to the structure, namely: deep groove ball bearings, angular contact ball bearings, cylindrical roller bearings, two-way thrust angular contact ball bearings, tapered roller bearings and thrust bearings. With the development of the times and technology, CNC machining technology has developed rapidly. 'Composite, fast, intelligent, high precision, and environmental protection' has become an inevitable trend for the continuous development of machine tool industry technology. Among them, the high-speed operation of processing can effectively improve the efficiency of machine tool processing and reduce the cycle time of workpiece processing. This requires machine tool spindle bearings and related components to meet the requirements of rapid processing and production. At this stage, most of the spindle bearings of CNC machine tools are limited to the four structural features of angular contact ball bearings, cylindrical roller bearings, bidirectional thrust angular contact ball bearings and tapered roller bearings. If it is an angular contact bearing installed in a general rotating shaft of a machine tool, its requirements and applications are the same as those of general gear transmission bearings, it only needs to meet the strength and service life requirements, and the speed ratio must not exceed the bearing limit value speed ratio specified in . Usually, the machine tool bearings mentioned by everyone refer to machine tool spindle bearings and ball screw bearings, and high-precision machine tool bearings refer to spindle bearings and ball screw bearings with an accuracy of P5 or higher. Only when the torque is accurate can the rotation be stable! (http:///product_cczzzc.html)
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