The steel is utilized for high strength worm gears (worm wheel) and steel could be plain carbon steel or alloy steel. The metal gears usually are heat treated in order to combine properly the toughness and tooth hardness.
The phosphor bronze is trusted for worms drive so as to reduce wear of the worms which is excessive with cast iron or steel.
Worm gear models are usually used to reduce speed and maximize torque. Because the worm drive undergoes more contact pressure cycles compared to the worm gear, the worm drive is often of a stronger material.
• Cast iron provides strength and simple manufacture.
• Cast steel provides easier fabrication, strong functioning loads and vibration level of resistance.
• Carbon steels are inexpensive and good, but are susceptible to corrosion.
• Aluminum is employed when low equipment inertia with some resiliency is required.
• Brass is inexpensive, simple to mold and corrosion resistant.
• Copper is easily designed, conductive and corrosion resistant. The gear’s strength would enhance if bronzed.
• Plastic is inexpensive, corrosion resistant, calm operationally and may overcome missing tooth or misalignment. Plastic-type is a smaller amount robust than metal and is susceptible to temperature adjustments and chemical substance 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 create a 27:1 decrease in speed while also changing the orientation of the rotating axis by 90 degrees. This equipment fastens to a 1/4″ shaft using a specialised 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 might be approximately divided among cutting teeth, cutting the teeth after casting, and teeth cutting after the exterior rim is certainly cast around the center of the blank.