EP also sells equipment tooth measuring products called Equipment GAGES! Gear Gages reduce mistakes, save time and money when identifying and purchasing gears. These pitch templates can be found in nine sets 
to identify all the regular pitch sizes: Diametral Pitch “DP”, Circular Pitch “CP”, External Involute Splines, Metric Module “MOD”, Stub Tooth, Good Pitches, Coarse Pitches and Unusual Pitches. Refer to the section on Equipment GAGES for catalog amounts when ordering.
MATERIAL recommended for worms is usually hardened steel and bronze for worm gears. However, depending on the application form 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 non-metallic (phenolic).
Security PROVISION: Worm gearing should not be used since a locking mechanism to hold large weights where reversing actions could cause harm or damage. In applications where potential harm is non-existent and self-locking is preferred against backward rotation after that use of an individual thread worm with a low helix angle automatically locks the worm equipment drive against backward rotation.
RATIOS of worm equipment sets are dependant on dividing the number of teeth in the gear by the amount of threads. Thus one threads yield higher ratios than multiple threads. All EP inc. worm gear sets can be found with either left or right hands threads. EP inc. worm gear sets can be found with Single, Double, Triple and Qua-druple Threads.
LUBRICATION can be an essential factor to boost performance in worm gearing. Worm equipment action generates considerable high temperature, decreasing efficiency. The quantity of power transmitted at confirmed temperature boosts as the efficiency of the gearing boosts. Proper lubrication enhances effectiveness by reducing friction and high temperature.
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