| 帶輪直邊齒型尺寸和公差(單位：MM) | ||||||
| 節(jié)線代號 | bw | hg |  +1.5 |
rb | rt | 2δ |
| MXL | 0.84±0.05 | 0.69 | 20 | 0.35 | 0.13 | 0.508 |
| XXL | 1.14±0.05 | 0.84 | 25 | 0.35 | 0.3 | 0.508 |
| XL | 1.32±0.05 | 1.65 | 25 | 0.41 | 0.64 | 0.508 |
| L | 3.05±0.10 | 2.67 | 20 | 1.19 | 1.17 | 0.762 |
| H | 4.19±0.13 | 3.05 | 20 | 1.6 | 1.6 | 1.372 |
| XH | 7.90±0.15 | 7.14 | 20 | 1.98 | 1.98 | 2.794 |
| XXH | 12.17±0.18 | 10.31 | 20 | 3.96 | 3.18 | 3.048 |
