Bearing Tolerance

The accuracy of NZSB deep groove ball bearings in divided into five grades of tolerances with National Standard of P.R. of china: GB/T307.1-94,which comparison with the ISO standard, and others in the following table.
 
Standard
Tolerance class
NZSB(GB/T307.1-2005)
P0
P6
P5
P4
P2
ISO (1)
Normal class
Class 6
Class 5
Class 4
Class 2
ANSI/AFBMA  (2)
ABEC-1
ABEC-3
ABEC-5
ABEC-7
ABEC-9
JIS  (3)
JIS-0
JIS-6
JIS-5
JIS-4
JIS-2
DIN  (4)
P0
P6
P5
P4
P2
SKF
P0
P6
P5
P4
P2
 
(1) International standard    (2) American sandard
(3) Japanese standard   (4) Germany standard