EP also sells gear tooth measuring gadgets called GEAR GAGES! Gear Gages reduce mistakes, save time and money when identifying and ordering gears. These pitch templates are available in nine sets to identify all the standard pitch sizes: Diametral Pitch “DP”, Circular Pitch “CP”, Exterior Involute Splines, Metric Module “MOD”, Stub Tooth, Good Pitches, Coarse Pitches and Uncommon Pitches. Make reference to the section on Equipment 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. 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 non-metallic (phenolic).
Security PROVISION: Worm gearing should not be used because a locking mechanism to carry weighty weights where reversing action can cause harm or injury. In applications where potential harm is nonexistent 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 gear drive against backward rotation.
RATIOS of worm equipment sets are dependant on dividing the number of teeth in the gear by the number of threads. Thus solitary 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 are offered with Single, Double, Triple and Qua-druple Threads.
LUBRICATION is an essential factor to improve effectiveness in worm gearing. Worm gear action generates considerable warmth, decreasing efficiency. The quantity of power transmitted at a given temperature improves as the effectiveness of the gearing boosts. Proper lubrication enhances effectiveness by reducing friction and temperature.
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