Bearing model includes pre-code, basic code, post code

The basic code indicates the basic type, structure and size of the bearing. It is the basis of the bearing code; the front and rear code are supplementary codes added around the basic code when the structural shape, size, tolerance and technical requirements of the bearing are changed.

The basic code except the needle bearing is composed of bearing type code, size series code and inner diameter code.

Type code:

0 double row angular contact ball bearings

1 self-aligning ball bearing

2 Spherical roller bearings and thrust spherical roller bearings

3 tapered roller bearings

4 double row deep groove ball bearings

5 thrust ball bearings

6 deep groove ball bearings

7 angular contact ball bearings

8 thrust cylindrical roller bearings

N cylindrical roller bearing

Double or multiple columns are represented by the letter NN

U outer spherical bearing

QJ four point contact ball bearing