The distance between corresponding points on adjacent teeth.
The ratio of the pitch diameter to the number of teeth. It is the most critical factor for gear compatibility. Pressure Angle ( rack and pinion calculations pdf
Use the Lewis Formula to calculate the bending stress on the teeth to ensure the material (steel, nylon, brass) can handle the load. The distance between corresponding points on adjacent teeth
Use these formulas to establish the dimensions of your system. rack and pinion calculations pdf
This is the clearance between mating teeth. For high-precision CNC machines, "zero-backlash" or split-pinion designs are often required.