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Distinction of precision bearings

  1. The size requirements are different, and the size deviation (inner diameter, outer diameter, ellipse, etc.) of products with high accuracy levels is smaller than that of products with low accuracy levels;
  2. The required values of rotation accuracy are different. The rotation accuracy (inner diameter runout, outer diameter runout, end face runout, etc.) of products with high accuracy levels are stricter than those of products with low accuracy levels;
  3. The required values of surface shape and surface quality are different. The surface shape and surface quality (surface roughness of raceway or channel, circular deviation, groove shape deviation, etc.) of products with high accuracy levels are stricter than those of products with low accuracy levels;
  4. The data efficiency of products with particularly high accuracy level is more favorable than that of products with general accuracy level.
  5. In general, the precision grade of the finished rolling bearing is divided into the following six grades (from low to high): 0; 6；  6X；  5；  4；  two



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