The steel can be used for high strength worm gears (worm wheel) and steel may be plain carbon steel or alloy steel. The steel gears are usually heat treated so that you can combine properly the toughness and tooth hardness.
The phosphor bronze is trusted for worms drive as a way to reduce wear of the worms which is excessive with cast iron or steel.
Worm gear units are usually used to lessen speed and enhance torque. Because the worm drive undergoes more contact stress cycles compared to the worm gear, the worm travel is normally of a stronger material.
• Cast iron provides durability and simple manufacture.
• Cast steel provides simpler fabrication, strong working loads and vibration level of resistance.
• Carbon steels are inexpensive and solid, but are susceptible to corrosion.
• Aluminum is used when low equipment inertia with some resiliency is necessary.
• Brass is inexpensive, easy to mold and corrosion tolerant.
• Copper is easily designed, conductive and corrosion resistant. The gear’s durability would increase if bronzed.
• Plastic is economical, corrosion resistant, noiseless operationally and can overcome missing teeth or misalignment. Plastic is a smaller amount robust than metal and is vulnerable to temperature alterations and chemical corrosion. Acetal, delrin, nylon, and polycarbonate plastics are normal.

This 27 tooth brass worm gear is intended to be used in combination 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 utilizing a specific 1/4″ D-hub to be used with 1/4″ D-shaft.

The manufacturing methods of worms are roughly divided among cutting, heat treated and ground after cutting and rolling. And for worm wheels, they may be roughly divided among cutting tooth, cutting teeth after casting, and tooth cutting after the exterior rim can be cast around the guts of the blank.