The recommended resources for the worm are hardened metal and bronze for the worm gear. Even so, based on the software, unhardened steel worms can operate sufficiently and far more economically on solid iron worm gears rated at fifty%. In addition to steel and hardened steel, worms are accessible in stainless steel, aluminum, bronze, and nylon worm gears are accessible in steel, hardened steel, stainless metal, aluminum, nylon, and non-metallic (phenolic).

Good quality