Module and Pitch Conversion
Converting module m to pitch p (straight toothed) and transverse pitch ps (helical toothed).
| Module m | 2 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
| Pitch p (mm) | 6.28 | 9.42 | 12.57 | 15.71 | 18.85 | 25.13 | 31.42 | 37.70 | 50.27 | 62.83 |
| Transverse pitch ps1) (mm) | 6.67 | 10.00 | 13.33 | 16.67 | 20.00 | 26.67 | 33.33 | 40.00 | 53.33 | 66.67 |
1) Helix angle β = 19°31'42"
Metric Pitch Conversion
| Pitch p (mm) | 5.00 | 7.50 | 10.00 | 12.50 | 15.00 | 20.00 |
| Module m | 1.59 | 2.39 | 3.18 | 3.98 | 4.77 | 6.37 |
Hardness and Strength
| Tooth Surface Condition | Material | Tensile Strength Rm (N/mm²) | Hardness HRc | Hardness HV1 |
| Soft | C45 | ~650 | - | - |
| Quenched & Tempered | 42CrMo4+QT | max. 1000 | - | - |
| Induction Hardened | C45 | - | 55…60 | - |
| 42CrMo4+QT | - | 59±3 | - |
| Case Hardened | 16MnCr5 | - | 58+3 | - |
| Nitrided | 42CrMo4+QT, 16MnCr5 | - | - | 550…700 |
| Through Hardened | X90CrMoV18 | - | 56±2 | - |
