Simple worm gear efficiency

Calculates idealized output torque from input torque, gear ratio, and efficiency.

Multiplies the efficiencies of consecutive gear stages.

Calculates bevel gear pitch angles for 90-degree intersecting shafts.

Calculates base circle diameter from pitch diameter and pressure angle.

Calculates center distance from two pitch diameters.

Calculates center distance from module and tooth counts for two external gears.