Cost

The suggested components for the worm are hardened steel and bronze for the worm gear. Nonetheless, dependent on the application, unhardened steel worms can operate sufficiently and much more economically on cast iron worm gears rated at 50%. In addition to steel and hardened steel, worms are offered in stainless steel, aluminum, bronze, and nylon worm gears are obtainable in steel, hardened metal, stainless steel, aluminum, nylon, and non-metallic (phenolic).
 Cost

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