The steel can be used for high strength worm gears (worm wheel) and steel could be plain carbon steel or alloy steel. The steel gears usually are heat treated so as to combine effectively the toughness and tooth hardness.
The phosphor bronze is trusted for worms drive so that you can reduce wear of the worms which is excessive with cast iron or steel.
Worm gear sets are usually used to lessen speed and boost torque. Since the worm drive undergoes more contact pressure cycles than the worm equipment, the worm travel is usually of a more powerful material.
• Cast iron provides strength and simple manufacture.
• Cast steel provides less complicated fabrication, strong operating loads and vibration level of resistance.
• Carbon steels are inexpensive and solid, but are vunerable to corrosion.
• Aluminum can be used when low equipment inertia with some resiliency is necessary.
• Brass is inexpensive, simple to mold and corrosion resistant.
• Copper is easily designed, conductive and corrosion resilient. The gear’s durability would increase if bronzed.
• Plastic is inexpensive, corrosion resistant, calm operationally and will overcome missing tooth or misalignment. Plastic-type is fewer robust than steel and is susceptible to temperature changes and chemical corrosion. Acetal, delrin, nylon, and polycarbonate plastics are common.

This 27 tooth brass worm gear is intended to be used with a worm gear to produce a 27:1 reduction in speed while also changing the orientation of the rotating axis by 90 degrees. This gear fastens to a 1/4″ shaft by using a specialised 1/4″ D-hub to be used with 1/4″ D-shaft.

The manufacturing ways of worms are roughly divided among cutting, heat treated and ground after cutting and rolling. And for worm wheels, they might be approximately divided among cutting pearly whites, cutting pearly whites after casting, and teeth cutting after the outdoors rim is cast around the center of the blank.