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Table1  The contrast of Bearing Steel No of each country
 
Country Japan American Germany French China
Bearing Steel No. (JIS)SUJ2 (AISI)52100 (DIN)100Cr6 (NF)100C6 (GB)GCr15
Stainless Steel No. (JIS)SUS440C (AISI)440C (DIN)WNr4535 (NF)Z100CD17 (GB)9Cr18


Table2  Accuracy Grade
 
Country Standard Accuracy Grade
Japan JIS P0 P6 P5
American ANSI ABEC1 ABEC3 ABEC5
Germany DIN P0 P6 P5
China GB 0 6 5


Table3  Radial Clearanse
 
Bore diameter group 2 Standard group group 3 group 4 group 5
Over Incl min max min max min max min max min max
2.5 6 0 7 2 13 8 23 - - - -
6 10 0 7 2 13 8 23 14 29 20 37
10 18 0 9 3 18 11 25 18 33 25 45
18 24 0 10 5 20 13 28 20 36 28 48
24 30 1 11 5 20 13 23 23 41 30 53
30 40 1 11 6 20 15 33 28 46 40 64
40 50 1 11 6 23 18 36 30 51 45 73
50 65 1 15 8 28 23 43 38 61 55 90
65 80 1 15 10 30 25 51 46 71 65 105

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