Comparison tolerance classes

Countries Standard
Tolerance class
China GB307 0(G) 6(E) 5(D) 4(C) 2(B)
ISO ISO492 0 0 5 4 2
Sweden Version 1985 0 P6 P5 P4 P2
Germany DIN 620/2 P0 P6 P5 P4 P2
U.S.A. ANSI B3.14 ABEC1 ABEC1 ABEC5 ABEC7 ABEC9
Japan JIS B1514 0 0 5 4 2


Noise level test

Diameter

d

mm
Diameter Series(1)
Diameter Series(2)
Diameter Series(3)
Z
Z1
Z2
Z1
Z2
Z3
Z1
Z2
Z3
10
43
42
38
42
39
35
44
40
37
12
44
43
39
43
39
35
45
40
37
15
45
44
40
44
41
36
46
42
38
17
46
44
40
45
41
36
47
42
38
20
47
45
41
46
42
38
48
43
39
25
48
46
42
47
43
40
49
44
41
30
49
47
43
48
44
41
50
45
42
35
51
49
45
50
46
43
52
47
44
40
53
51
46
52
47
44
54
49
45
45
55
53
48
54
49
46
56
51
47
50
57
54
50
55
51
48
57
53
49