The steel can be used for high strength worm gears (worm wheel) and steel could be plain carbon steel or alloy steel. The metal gears are often heat treated to be able to combine correctly the toughness and tooth hardness.
The phosphor bronze is widely used for worms drive as a way to reduce wear of the worms which will be excessive with cast iron or steel.
Worm gear pieces are usually used to lessen speed and increase torque. Since the worm travel undergoes more contact stress cycles than the worm equipment, the worm travel is usually of a more powerful material.
• Cast iron provides durability and simple manufacture.
• Cast steel provides less difficult fabrication, strong doing work loads and vibration level of resistance.
• Carbon steels are inexpensive and strong, but are susceptible to corrosion.
• Aluminum is used when low gear inertia with some resiliency is necessary.
• Brass is inexpensive, easy to mold and corrosion tolerant.
• Copper is easily shaped, conductive and corrosion tolerant. The gear’s power would increase if bronzed.
• Plastic is inexpensive, corrosion resistant, tranquil operationally and will overcome missing the teeth or misalignment. Plastic-type material is much less robust than metallic and is susceptible to temperature alterations and chemical substance corrosion. Acetal, delrin, nylon, and polycarbonate plastics are common.

This 27 tooth brass worm gear is intended to be used in combination with a worm gear to make a 27:1 decrease 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 specific 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 could be roughly divided among cutting the teeth, cutting teeth after casting, and the teeth cutting after the outdoors rim is definitely cast around the guts of the blank.