EP also sells gear tooth measuring gadgets called Equipment GAGES! Gear Gages decrease mistakes, save time and money when identifying and buying gears. These pitch templates are available in nine sets to recognize all the regular pitch sizes: Diametral Pitch “DP”, Circular Pitch “CP”, Exterior Involute Splines, Metric Module “MOD”, Stub Tooth, Great Pitches, Coarse Pitches and Uncommon Pitches. Make reference to the section on GEAR GAGES for catalog quantities when ordering.
Materials recommended for worms can be hardened steel and bronze for worm gears. Nevertheless, depending on the application unhardened metal worms operate adequately and more economically with cast iron worm gears at 50% horsepower ratings. Furthermore to metal and hardenedsteel, worms are available in stainless, aluminum, bronze and nylon; worm gears can be found in steel, hardened metal, stainless, aluminium, nylon and nonmetallic (phenolic).
Protection PROVISION: Worm gearing should not be used since a locking mechanism to hold large weights where reversing actions could cause harm or injury. In applications where 
potential harm is non-existent and self-locking is preferred against backward rotation after that use of a single thread worm with a low helix angle automatically locks the worm equipment drive against backward rotation.
RATIOS of worm equipment sets are determined by dividing the number of teeth in the gear by the amount of threads. Thus single threads yield higher ratios than multiple threads. All EP inc. worm gear sets can be found with either left or right hand 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 heat, decreasing efficiency. The quantity of power transmitted at confirmed temperature improves as the effectiveness of the gearing boosts. Proper lubrication enhances effectiveness by reducing friction and high temperature.
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