The performance of a worm equipment transmission is dependent to a large extent on the helix angle of the worm. Multi-threaded worms and gears with greater helix angles have established to be 25% to 50% far more effective than single-threaded worms. The sliding action of the worm meshing with or meshing with the worm equipment results in substantial friction and reduction of performance when compared to other sorts of gears. Improve effectiveness with hardened and ground worm switch bronze worm gears.