Home > En > NSK - Bearing handbook > Formulation of bearing number
Basic numbers Auxiliary symbols
Internal clearance symbols
Symbol Meaning (radial clearance)
C1 For all radial bearings Clearance less than C2
C2 Clearance less than CN
Omitted CN clearance
C3 Clearance greater than CN
C4 Clearance greater than C3
C5 Clearance greater than C4
CC1 For non-interchangeable cylindrical roller bearings Clearance less than CC2
CC2 Clearance less than CC
CC Normal clearance
CC3 Clearance greater than CC
CC4 Clearance greater than CC3
CC5 Clearance greater than CC4
MC1 For extra-small and miniature ball bearings Clearance less than MC2
MC2 Clearance less than MC3
MC3 Normal clearance
MC4 Clearance greater than MC3
MC5 Clearance greater than MC4
MC6 Clearance greater than MC5
CM Clearance in deep groove ball bearings for electric motors
CT Clearance in cylindrical roller bearings for electric motors
CM

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Copyright 2009    Last modified: 02/12/2013

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