nsk轴承的公差是指轴承零件加工后的尺寸和形位公差以及nsk轴承产品的旋转精度。nsk轴承的公差主要分为向心轴承公差、推力轴承公差以及圆锥滚子轴承公差。对于高速和高精度的旋转机构中，一般课选用4、2级轴承，例如，高精度齿轮总磨床、精度坐标床的主轴轴承，航空、高速摄影机主轴承等。
The tolerance of NSK bearing refers to the dimensional and geometric tolerance of bearing parts after machining and the rotation accuracy of NSK bearing products. The tolerance of NSK bearing is mainly divided into radial bearing tolerance, thrust bearing tolerance and tapered roller bearing tolerance. For the high-speed and high-precision rotating mechanism, the 4-level and 2-level bearings are generally selected, for example, the main bearings of high-precision gear grinding machine, precision coordinate machine, aviation, high-speed camera, etc.
对于中等转速以及旋转精度要求不高的一半传动装置中，选用0级轴承，入普通机床的变速箱、进给箱，汽车、拖拉机等。对于装置、对于转速较高和旋转精度要求较高的旋转的机构中，课选用6、5级轴承，例如，普通机床的主轴轴承，其前轴铜钟 一次性止血带 标志桩模具 钢丝轮 流水槽模具 防撞墙模具 检查井钢模具 不锈钢铸件 模锻件承一般采用5级。后轴承一般采用6级，精密机床主轴轴承多采用5级，精密仪器、仪表轴承多采用4级以上的公差。总之，轴承公差的选择，主要取决于工作条件和使用要求。
For half of the transmission devices with medium speed and low rotation accuracy requirements, grade 0 bearing is selected to enter the gearbox, feed box, automobile, tractor, etc. of the general machine tool. For the device, for the mechanism with high rotation speed and high rotation accuracy requirements, grade 6 and grade 5 bearings are selected. For example, the front bearing of the spindle bearing of the general machine tool is generally grade 5. The rear bearing is generally grade 6, the spindle bearing of precision machine tool is grade 5, and the bearing of precision instrument and instrument is more than grade 4. In a word, the selection of bearing tolerance mainly depends on the working conditions and use requirement