Home > En > NSK - Bearing handbook > Formulation of bearing number
Basic numbers Auxiliary symbols
Bore numbers
Number Meaning
1 Bearing bore 1mm
2 2
3
.
.
9
3
.
.
9
00 10
01 12
02 15
03 17
/22 22
/28 28
/32 32
04(01) 20
05 25
06


08
30
f
f
440
92 460
96 480
/500 500
/530 530
/560


/2360
560


2360
/2500 560


2500

Note (1): For Bearing Bore Numbers 04 through 96, five times the bore number gives the bore size (mm) (except double-direction thrust ball bearings).


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