Bearing Factory part numbers follow the Internationally recognised system for Metric Ball and Roller Bearings, but to help our customers we have produced this section to explain how part numbers are created. 

Example Bearing Code: 

Bearing Type 
Bearing Series 
Bore Code 
Additional Information 
Clearance Code 
Bearing Type 
This part of the code designates the Rolling Element Type, Inner and Out Race style, and Contact angle. 
0 Double row angular contact ball bearing 
1 Self-aligning ball bearing 
2 Spherical roller bearing, spherical roller thrust bearing 
3 Tapered roller bearing 
4 Double row deep groove ball bearing 
5 Thrust ball bearing 
6 Single row deep groove ball bearing 
7 Single row angular contact ball bearing 
8 Cylindrical roller thrust bearing 
QJ Four-point contact ball bearing 
N Cylindrical roller bearing. Followed by additional letters to confirm Race Flange Configuration 
Bearing Series 
0 Extra Light 
2 Light 
3 Medium 
4 Heavy 
Bore Code 
00 10mm 
01 12mm 
02 15mm 
03 17mm 
04 Onwards, Multiply by 5 e.g. 04 x 5 = 20mm 12 x 5 = 60mm 
Additional Information 
RS Single Rubber Seal 
2RS Two Rubber Seals 
Z Single Metal Shield 
ZZ/2Z Two Metal Shields 
NR Circlip Groove and Circlip in outer race 
K Tapered Bore 
C1/C2 Clearance Smaller than Standard Clearance 
Blank/CM Standard Manufacturing Clearances 
C3/C4 Clearance Larger than Standard Tolerance 
If your bearing has further marking here, please contact us to discuss your requirements, whilst they are relatively rare, there are far too many options to mention so we will be happy to explain what your code means as the same time as offering a bespoke quotation for your approval. 
That said, some common options are listed on our website. 
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