The main differences between TIMKEN bearing products with high accuracy and low accuracy are:

  1. The size requirements are different, and the dimensional deviations (inner diameter, outer diameter, ellipse, etc.) of the products with high precision grades are lower than the precision grade。The required value of the product should be small;

 

  1. The required value of rotation accuracy is different. The rotation accuracy of products with high accuracy level (inner radial runout, outer radial runout, end faceThe runout of the raceway, etc.) are stricter than the value required for products with low accuracy levels;

 

  1. The required values of surface shape and surface quality are different. The surface shape and surface quality (raceway or channel) of products with high precision level.The surface roughness, circular deviation, groove deviation, etc.) are all stricter than the values required for products with low accuracy levels;

 

  1. The materials of products with particularly high accuracy grades are more advantageous than the material properties of products with general accuracy grades.

In general, the precision grades of rolling bearing finished products are divided into the following six grades (from low to high): 0; 6; 6X; 5; 4; 2.