sci.gear-module-tooth-geometry Calculator
Calculates gear module m = pitch diameter/tooth count, tooth dimensions (addendum, dedendum, pitch), and gear ratio. Standard module values (ISO): 1, 1.25, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10 mm — gears must have matching modules and pressure angles to mesh correctly.
Inputs
- M Module
- Reference formula or conversion factor shown for context.
- Z Teeth
- Count of items or occurrences.
- Pressure Angle Deg
- Force per unit area (Pa). Atmospheric pressure at sea level: 101,325 Pa. Check whether gauge or absolute pressure is required.
- Facewidth M Factor
- A multiplier applied in the calculation.
Results
- pitch circle diameter d (mm)
- The computed diameter -- twice the radius.
- addendum circle ra (mm)
- Sample size or count used in the calculation.
- dedendum circle rf (mm)
- Sample size or count used in the calculation.
- base circle rb (mm)
- Reference formula or conversion factor shown for context.
- circular pitch p (mm)
- Reference formula or conversion factor shown for context.
- face width b (mm) at
- The computed width.
addendum pitch tooth number geometry