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发布日期：2024-04-09 浏览次数：
标准类型：JIS/日本
标准号：JIS B1251-2001
单位：毫米（mm） 规格：Φ2~Φ24
| (mm) | d max | d min | dc max | dc min | h max | h min | Number of teeth min | H |
|---|---|---|---|---|---|---|---|---|
| Φ2 | 2.4 | 2.2 | 4.8 | 4.5 | 0.325 | 0.275 | 7 | 0.6 |
| Φ2.5 | 2.9 | 2.7 | 5.7 | 5.4 | 0.325 | 0.275 | 7 | 0.6 |
| Φ3 | 3.4 | 3.2 | 6.5 | 6.1 | 0.485 | 0.415 | 8 | 0.9 |
| Φ3.5 | 3.9 | 3.7 | 7.5 | 7.1 | 0.485 | 0.415 | 8 | 0.9 |
| Φ4 | 4.5 | 4.3 | 8.5 | 8.1 | 0.485 | 0.415 | 8 | 0.9 |
| Φ4.5 | 5 | 4.8 | 9.5 | 9.1 | 0.535 | 0.465 | 8 | 1 |
| Φ5 | 5.5 | 5.3 | 10 | 9.6 | 0.64 | 0.56 | 8 | 1.2 |
| Φ6 | 6.7 | 6.4 | 11 | 10.5 | 0.64 | 0.56 | 9 | 1.2 |
| Φ7 | 7.7 | 7.4 | 13 | 12.5 | 0.85 | 0.75 | 9 | 1.6 |
| Φ8 | 8.7 | 8.4 | 15 | 14.5 | 0.85 | 0.75 | 9 | 1.6 |
| Φ10 | 10.9 | 10.5 | 18 | 17.5 | 0.95 | 0.85 | 9 | 1.8 |
| Φ12 | 12.9 | 12.5 | 21 | 20.4 | 1.055 | 0.945 | 10 | 2 |
| Φ14 | 14.9 | 14.5 | 23 | 22.4 | 1.055 | 0.945 | 10 | 2 |
| Φ16 | 16.9 | 16.5 | 26 | 25.4 | 1.265 | 1.135 | 12 | 2.4 |
| Φ18 | 19.5 | 19 | 29 | 28.4 | 1.265 | 1.135 | 12 | 2.4 |
| Φ20 | 21.5 | 21 | 32 | 31.2 | 1.47 | 1.33 | 12 | 2.8 |
| Φ22 | 23.5 | 23 | 35 | 34.2 | 1.47 | 1.33 | 14 | 2.8 |
| Φ24 | 25.5 | 25 | 38 | 37.2 | 1.68 | 1.52 | 14 | 3.2 |
