Published：18:21 20 Jul, 2026
| Standard System | Standard Reference | Numerical Scale | Description |
| ISO (International) | ISO 1328-1 / 1328-2 | 0 – 12 (Lower is higher precision) | Globally recognized standard for gear accuracy. |
| DIN (Germany) | DIN 3961 / 3962 / 3963 | 1 – 12 (Lower is higher precision) | Widely used in European industrial engineering. |
| GB (China) | GB/T 10095.1 / 10095.2 | 0 – 12 (Lower is higher precision) | Equivalent / Identical to ISO 1328. |
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