Most suitable choice of gearing when high drive decrease is required. Worm Wheels resemble spur gears with the addition of a throat cut into the O.D. of wheel. The throat permits the 
worm wheel to fully envelope the threads of the worm. Threads, not teeth are cut on the worm, and by adjusting the amount of threads, different ratios can be achieved without altering mounting plans. A distinctive Worm wheel gear feature of Worm and Wheel assemblies can be their capability to prohibit back driving
Pitch: 16 to 64 DP and 1.5 to .5 MOD
Materials: Brass for Worm Gear and Stainless Steel for Worm
Single, Dual or Quad Start