Precision bearings are divided into P0,P6,P5,P4 and P2 according to ISO classification standards. The levels are successively higher, with P0 being normal and all other levels being precision. Of course, different classification standards and different types of bearings have different classification methods, but the significance is one to the. The performance of precision bearing requires that the rotating body has high runout precision, high speed rotation and small friction and friction change.


Precision bearings and ordinary bearings should be distinguished from the following points:


1, size requirements are not the same, the size deviation of products with high precision (inner diameter, outer diameter, ellipse, etc.) is smaller than the value of products with low precision;


2, the requirements of rotation accuracy are not the same, the rotation accuracy of products with high precision (inner radial runout, outer diameter runout, end runout of the raceway, etc.) are stricter than the requirements of products with low precision;


3, the surface shape and surface quality requirements are not the same, the surface shape and surface quality of products with high precision (raceway or channel surface roughness, circular deviation, groove shape deviation, etc.) are stricter than the value of products with low precision;


4. The material properties of products with high accuracy are more favorable than those of products with general accuracy.


The article links: China's machine tool business website http://www.jc35.com/news/Detail/39403.html