The effectiveness of a worm gear transmission is dependent to a large extent on the helix angle of the worm. Multi-threaded worms and gears with larger helix angles have verified to be 25% to fifty% far more effective than one-threaded worms. The sliding motion of the worm meshing with or meshing with the worm gear benefits in appreciable friction and reduction of efficiency compared to other types of gears. Boost effectiveness with hardened and floor worm switch bronze worm gears.