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The recommended materials for the worm are hardened steel and bronze for the worm equipment. Nevertheless, based on the application, unhardened metal worms can operate sufficiently and much more economically on cast iron worm gears rated at fifty%. In addition to metal and hardened metal, worms are accessible in stainless steel, aluminum, bronze, and nylon worm gears are offered in metal, hardened steel, stainless steel, aluminum, nylon, and non-metallic (phenolic).

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