The performance of a worm gear transmission relies upon to a big extent on the helix angle of the worm. Multi-threaded worms and gears with increased helix angles have verified to be 25% to fifty% more efficient than single-threaded worms. The sliding motion of the worm meshing with or meshing with the worm gear results in substantial friction and decline of effectiveness compared to other sorts of gears. Increase performance with hardened and ground worm change bronze worm gears.