Do you know the clearance grade of the bearing?
November 23, 2018
Radial internal clearance code:
NSK, for example
C2 < CN < C3 < C4 < C5CN (some factories call it C0) is the standard clearance, greater than the standard clearance is called a large clearance, less than the standard clearance is called a small clearance.
CM clearance: motor clearance, clearance value between CN and C3, the range is relatively small.
MC1 < MC2 < MC3 < MC4 < MC5
Small diameter ball bearings (miniature bearings) radial internal clearance. MC3 is the standard clearance.
E and EN: radial internal clearance of magneto bearing.
Bearings of different accuracy may have different clearance.
For example, code P63 is a combination of precision code P6 and clearance code C3.
/C1-- one group with clearance conforming to the standard and less than two groups with clearance.
C2-- 2 groups with clearance conforming to the standard, with clearance less than 0.
/C0-- group 0 of clearance conforming to the standard, omitted from the code name and not indicated.
C3-- 3 groups with clearance meeting the standard and clearance greater than 0.
/C4-- 4 groups with clearance conforming to the standard, and clearance greater than 3 groups.
/C5-- 5 groups with clearance conforming to the standard, and clearance greater than 4 groups
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