Solution Description
The recommended components for the worm are hardened metal and bronze for the worm gear. Even so, dependent on the application, unhardened steel worms can run adequately and far more economically on cast iron worm gears rated at 50%. In addition to steel and hardened metal, worms are accessible in stainless steel, aluminum, bronze, and nylon worm gears are obtainable in metal, hardened steel, stainless steel, aluminum, nylon, and non-metallic (phenolic).