Metric module gear
- Input
- Module 2 mm, 30 teeth, 20 degree pressure angle.
- Method
- Apply standard module formulas.
- Formula
- d = m x z; da = m x (z + 2); p = pi x m
- Intermediate steps
- d = 2 x 30 = 60 mm
- da = 2 x 32 = 64 mm
- p = pi x 2 = 6.283 mm
- Final result
- Pitch diameter 60 mm and outside diameter 64 mm.
- Interpretation
- Use 60 mm as the pitch-circle basis before checking mating gear center distance.
- Limitation
- The worked example is a planning illustration only and must be checked against standards, supplier data, CAD documentation, manufacturing limits, and professional engineering judgement.