Clearance: The amount of clearance between the rolling element and the ring.
Accuracy: refers to the dimensional accuracy and rotational accuracy of bearings.
The accuracy of bearings has a certain impact on the clearance, but has no effect on the size of the clearance. The clearance size is set before leaving the factory.
1、 Radial internal clearance code:
C2<CN<C3<C4<c5, also known as c0, is the standard clearance, larger than the standard clearance is called the large clearance, and smaller than the standard clearance is called the small clearance. CM clearance: Motor specific clearance, with a clearance value between CN and C3, with a relatively small range.
MC1<MC2<MC3<MC4<MC5
Radial internal clearance of small diameter ball bearings (micro bearings). MC3 is the standard clearance. E and EN: Radial internal clearance of magneto bearings.
2、 Types of bearing clearance:
C1- Group 1 with clearance in accordance with standard regulations, with clearance less than 2 groups.
C2- Two groups with clearance in accordance with standard regulations, with clearance less than 0 groups.
C0- Group 0 with clearance in accordance with standard regulations, omitted from the code and not indicated.
C3- Three groups with clearance in accordance with standard regulations, with clearance greater than 0 groups.
C4- Four groups with clearance in accordance with standard regulations, with clearance greater than three groups.
C5-5 groups with clearance in accordance with standard regulations, with clearance greater than 4 groups.
