EP also sells equipment tooth measuring devices called Equipment GAGES! Gear Gages reduce mistakes, save time and money when identifying and buying gears. These pitch templates can be found in nine sets to identify all the regular pitch sizes: Diametral Pitch “DP”, Circular Pitch “CP”, Exterior Involute Splines, Metric Module “MOD”, Stub Tooth, Fine Pitches, Coarse Pitches and Unusual Pitches. Make reference to the section on Equipment GAGES for catalog figures when ordering.
MATERIAL recommended for worms is definitely hardened steel and bronze for worm gears. However, depending on the application unhardened metal worms operate adequately and more economically with cast iron worm gears at 50% horsepower ratings. Furthermore to steel and hardenedsteel, worms can be found in stainless, light weight aluminum, bronze and nylon; worm gears are available in steel, hardened metal, stainless, aluminum, nylon and nonmetallic (phenolic).
Protection PROVISION: Worm gearing shouldn’t be used as a locking mechanism to carry heavy weights where reversing actions can cause harm or damage. In applications where potential harm is non-existent and self-locking is desired against backward rotation after that use of a single thread worm with a minimal helix angle instantly locks the worm equipment drive against backward rotation.
RATIOS of worm 
equipment sets are dependant on dividing the number of teeth in the apparatus by the amount of threads. Thus single threads yield higher ratios than multiple threads. All EP inc. worm equipment sets are available with either remaining or right hands threads. EP inc. worm gear sets can be found with Single, Dual, Triple and Qua-druple Threads.
LUBRICATION can be an essential factor to improve effectiveness in worm gearing. Worm equipment action generates considerable heat, decreasing efficiency. The amount of power transmitted at confirmed temperature improves as the efficiency of the gearing raises. Proper lubrication enhances efficiency by reducing friction and high temperature.
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