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| TECHNICAL INFORMATION |
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| BEARING
TOLERANCE |
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| Comparison
of tolerance classifications of national standards |
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| National standard |
Tolerance class |
| China National standard |
GB/T 307.1 |
Class 0 |
Class 6 |
กก |
Class 5 |
Class 4 |
Class 2 |
| International organization for standardization |
ISO 492 |
Normal class |
Class 6 |
Class 6X |
Class 5 |
Class 4 |
Class 2 |
| Deutsches institute for
normung |
DIN 620 |
Normal class |
Class 6 |
Class 6X |
Class 5 |
Class 4 |
Class 2 |
| Japanese industrial standed |
JIS B1514 |
Normal class |
Class 6 |
Class 6X |
Class 5 |
Class 4 |
Class 2 |
| American
national standard institus
anti-friction bearing manufactures |
ANSI |
Tapered roller |
Class 4 |
Class 2 |
กก |
Class 3 |
Class 0 |
Class 00 |
| Bearings |
| Inch size |
| AFBMA |
Ball bearings |
ABEC 1 |
ABEC 3 |
กก |
ABEC 5 |
ABCE 7 |
ABCE 9 |
| ABEC
5P |
ABCE 7P |
ABCE 9P |
| Roller bearings |
RBEC 1 |
RBEC 3 |
กก |
RBEC 5 |
RBEC 7 |
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Tolerance Symbols
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