RAW MATERIALS FOR TRANSMISSION GEARS
Gears are generally designed for a finite life. Alloy steels are most favoured gear material.
Case hardening steels provide the ideal features required for gear material. For gear teeth,
3
4
the surface is to be hard with soft and tough core to provide wear and fatigue resistance.
Case hardening steels do have varying chemical composition, and are named accordingly,
e.g. Chrome Steel, Low molybdenum steel, Chrome molybdenum steel, Nickel-chromemolybdenum
steel.