trigonometry - How can you calculate the module of a gear? - Mathematics Stack Exchange
Contact Ratio of Gears – Marples Gears
Gear ratio- calculation A 100 tooth gear drives a 25 tooth gear . Calculate the gear ratio of the meshing teet… | Mechanical gears, Mechanic, Mechanical design
Calculations of Internal Gears and The Fundamentals of Helical Gears - SDPSI
Gear Design Equations and Formula | Circular Pitches and Equivalent Diametral Pitches Table