How to distinguish between precision bearings and plain bearings?

Precision bearings are classified according to ISO's grading standards: P0, P6, P5, P4, P2. Grades increase in sequence, where P0 is the general accuracy, and other grades are precision grades. Of course, different grading standards, different types of bearings, their classification methods are different, but the significance is one to the. The performance of precision bearings requires that the rotating body has high run-out precision, high-speed rotation, and low friction and friction changes.

Precision bearings and plain bearings should be distinguished from the following:

1. The dimensional deviations (inner diameter, outer diameter, ellipse, etc.) of products with different dimensional requirements are not the same as those for products with high accuracy levels.

2. The requirements for rotation accuracy are not the same, and the accuracy of the product (such as inner radial runout, outer radial runout, end surface raceway runout, etc.) of the product with a high accuracy level must be stricter than the value of the product with a low accuracy level;

3. The requirements for surface shape and surface quality are different. The surface shape and surface quality (surface roughness, roundness deviation, groove shape deviation, etc.) of products with high accuracy level are lower than the accuracy level. Product requirements must be strict;

4. The material of a product with a particularly high level of accuracy is more favorable than the material of a general accuracy grade.

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