精密轴承与普通轴承应从以下几点来进行区分：1、尺寸要求值不一样，精度等

Precision bearings and plain bearings following points should be distinguished: <br>1, the low value of the required value is not the same size, its high level of accuracy of the product size deviation (inner diameter, outer diameter, oval, etc.) than the required accuracy level of the product be less ; <br>2, rotation accuracy required value is not the same, high levels of precision products which rotational accuracy (runout inner diameter, outer radial runout, the runout end face of the raceway, etc.) value is lower than the level of accuracy required for strict product ; <br>low 3, surface shape and surface quality requirement value is not the same, high levels of precision products surface shape and surface quality (channel or raceway surface roughness, deviation from circular, gutter-like variation) than the precision grade value of the product to be strict requirements; <br>4, particularly high level of precision products more favorable material properties of the material of the general level of accuracy than the product. <br>In general, the finished rolling accuracy grades six levels (from low to high): 0; 6; 6X; 5; 4; 2

Precision bearings should be distinguished from ordinary bearings from the following points:<br>1, the size requirements value is not the same, the accuracy level of high-grade products its dimensional deviation (inner diameter, outer diameter, ellipses, etc.) than the accuracy level of low product requirements of the value is smaller;<br>2, the requirement value of rotation accuracy is not the same, the high accuracy level of the product its rotation accuracy (internal radial beat, outer radial beat, end face the runner's beat, etc.) are more stringent than the accuracy level of the product requirements of the value;<br>3, the surface shape and surface quality of the required value is not the same, the high accuracy level of the product its surface shape and surface quality (the surface roughness of the raceway or ditch, circular deviation, trench deviation, etc.) are more stringent than the accuracy level of the product requirements of the value;<br>4, the accuracy level of the product particularly high its material than the general accuracy level of the product material performance is more favorable. In general, the accuracy of the finished rolling bearing is divided into six levels (from low to high): 0;6;6X;5;4;2

The distinction between precision bearing and common bearing should be made from the following points:<br>1. The size requirements are different. The size deviation (inner diameter, outer diameter, ellipse, etc.) of products with high accuracy level is smaller than that of products with low accuracy level.<br>2. The required value of rotation accuracy is different. The rotation accuracy of products with high accuracy level (i.e. internal diameter run out, external diameter run out, end-to-end run out, etc.) is stricter than that of products with low accuracy level.<br>3. The required values of surface shape and surface quality are different. The surface shape and surface quality (surface roughness, circular deviation and groove deviation of raceway or raceway) of products with high precision level are stricter than those of products with low precision level.<br>4. The material performance of products with high precision level is more favorable than that of products with general precision level.<br>In general, the accuracy grade of finished rolling bearing products is divided into the following six grades (from low to high): 0; 6; 6x; 5; 4; 2<br>