Bearing rear code
① Bearing Internal structure code:
This code is immediately after the basic generation and is represented by letters to reflect the different internal structures of similar bearings, such as angular contact bearings C, AC and B, which represent the nominal contact angle respectively α 15 °, 25 ° and 40 °.
② Sealing, dustproof and external structure shape change code:
For example, RS, RZ, Z and FS respectively indicate that there is a skeleton rubber sealing ring on one side of the bearing, and R, N and NR respectively indicate that there are stop plates and stop grooves on the outer ring of the bearing.
③ Tolerance class code:
From high level to low level
Representation of cage:
A: Indicates the outer ring guide
B: Indicates inner ring guidance
J: Represents a stamped steel plate cage
Q: Bronze solid cage
M: Brass solid cage
TN: Bearingengineering plastic cage
