Precision bearings are classified into P0, P6, P5, P4, P2 grade according to ISO classification standards and the grades increase in sequence. Among them P0 is ordinary precision, and other grades are precision grades. With different classification standards and different types of bearings, we have different classification methods. The performance of precision bearings requires that the rotating body has high runout accuracy, high-speed rotation, and that friction and friction change are small.

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

1.The dimensional requirements are different, and the dimensional deviations (inner diameter, outer diameter, ellipse, etc.) of bearings with high accuracy grades are smaller than those required by bearings with lower accuracy grades.

2.The required value of the rotation accuracy is different. The rotation accuracy (internal radial runout, external radial runout, end face runout to raceway) of bearings with high accuracy grades are stricter than those required by bearings with lower accuracy grades.

3.The requirements for surface shape and surface quality are different. For bearings with high accuracy grades, the surface shape and surface quality (surface roughness of raceways, circular deviations, groove deviations) are stricter than those required by bearings with lower accuracy grades.

4.The materials of bearings with particularly high accuracy grades are more better than those of bearings with general accuracy grades.

In general, the accuracy grade of the finished rolling bearing is divided into the following six grades (from low to high): 0, 6, 6X, 5, 4, and 2.

To meet the requirements of industrial applications, ZYS can offer batch production of standard ball bearings with different sizes and different bearing types, such as angular contact ball bearing, deep groove ball bearing, ball screw bearings, thrust angular contact ball bearings, thrust ball bearings, self aligning ball bearings. Customized precision ball bearings are also available from ZYS. Please contact sales@zys.com.cn for quotation.