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| Standard | Tolerance Grade | ||||
| GB307.1(China) | 0 | 6 | 5 | 4 | 2 |
| ISO | 0 | 6 | 5 | 4 | 2 |
| SKF(Sweden) | PO | P6 | P5 | P4 | P2 |
| DIN(Germany) | PO | P6 | P5 | P4 | P2 |
| JIS(Japan) | PO | P6 | P5 | P4 | P2 |
| ANSI(U.S.A) | ABEC1 | ABEC3 | ABEC5 | ABEC7 | ABEC9 |
