EP also sells gear tooth measuring gadgets called Equipment GAGES! Gear Gages reduce mistakes, save money and time when identifying and buying gears. These pitch 
templates are available in nine sets to recognize all the standard pitch sizes: Diametral Pitch “DP”, Circular Pitch “CP”, Exterior Involute Splines, Metric Module “MOD”, Stub Tooth, Fine Pitches, Coarse Pitches and Unusual Pitches. Refer to the section on GEAR GAGES for catalog quantities when ordering.
MATERIAL recommended for worms is usually 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. In addition to steel and hardenedsteel, worms can be found in stainless, aluminium, bronze and nylon; worm gears can be found in steel, hardened metal, stainless, aluminium, nylon and nonmetallic (phenolic).
SAFETY PROVISION: Worm gearing shouldn’t be used since a locking mechanism to hold heavy weights where reversing action could 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 automatically locks the worm equipment drive against backward rotation.
RATIOS of worm equipment sets are determined by dividing the amount 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 are available with either left or right hands threads. EP inc. worm gear sets can be found with Single, Dual, Triple and Qua-druple Threads.
LUBRICATION is an essential factor to improve efficiency in worm gearing. Worm equipment action generates considerable high temperature, decreasing efficiency. The quantity of power transmitted at confirmed temperature increases as the performance of the gearing increases. Proper lubrication enhances efficiency by reducing friction and heat.
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