If two gears are in mesh their module must be the same.
It is the ratio of numbers of teeth to the pitch circle diameter. ... It is the radial distance of a tooth from the pitch circle to the bottom of the tooth (or dedendum circle).
What has to be the same for 2 gears to mesh?
Meshing gears must have the same module: A 1 module gear has 1 tooth for every mm of pitch circle diameter. Thus a 0.3 mod gear having 60 teeth will have a pitch circle diameter of 18 mm (0.3 *60).
What does it mean when two gears are meshing?
The rotational speeds, and the torques, of two meshing gears differ in proportion to their diameters. The teeth on the two meshing gears all have the same shape. Two or more meshing gears, working in a sequence, are called a gear train or a transmission.
