How to divide the precision of bearing? Bearing precision in the processing of the separation of different in the use of value is also different. For example, HRB bearings in China are 1.5 times as accurate as p 6,2 times as accurate as p 5,2 times as accurate as p 4,2 times accurate as p 5, and 2.5 times accurate as p 5. Level 0: commonly used in bearing systems with rotating accuracy exceeding 10 microns. For example, the speed control mechanism on the general CNC lathe, the cutting tool mechanism, the speed control mechanism of the car, the speed control mechanism of the large tractor, the general chemical machinery such as motor, centrifugal pump and agricultural machinery rotating mechanism. Grade 6,5: in precision bearing systems with rotating accuracy of 5-10 microns or higher speeds, such as those commonly used in CNC lathes (5 for front support points and 6 for rear support points) , more sophisticated equipment, instrument panel and its instruments, instrument panel and precision rotating mechanism. Level 4,2: in Super Instruments, such as precision coordinate milling machine, precision grinder transmission gear system software, such as instrumentation, dashboard and high-speed camera, rotation accuracy does not exceed 5 microns, speed is relatively high. Chinese bearing the old code precision grade code. International norms are formulated in accordance with the ISO standards, and generally are unified with ISO, some are more strict. Accuracy is divided into specification accuracy and rotation accuracy. Zero, six, six, five, four, two.
