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NSK bearing prefix code meaning

Date:2016-4-29

F deep groove ball bearings - flange ring (for D less than 10 mm), for example: F605.
HR - high load tapered roller bearings, for example: HR30207J.
NSK bearing rear code meaning
A - internal design and standard of different bearings.
A - angular contact ball bearings, contact angle of 30 degrees.
A5 - angular contact ball bearings, contact angle of 25 degrees
ZS, Z - one side with steel plate dust cover.
ZZS, ZZ - double plate with steel dust cover.
DU, D -- one side contact type rubber sealing ring.
C1 - radial bearing radial clearance, clearance smaller than C2.
C2 - radial bearing radial clearance, smaller than standard clearance.
CN (omitted) - radial bearing radial clearance standard.
C3 - radial bearing radial clearance, clearance larger than the standard.
C4 - radial bearing radial clearance, clearance larger than C3.

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