EP also sells equipment tooth measuring devices called Equipment GAGES! Gear Gages decrease mistakes, save money and time 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”, External Involute Splines, Metric Module “MOD”, Stub Tooth, Good Pitches, Coarse Pitches and Unusual 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. Nevertheless, depending on the application form 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, light weight aluminum, bronze and nylon; worm gears can be found in steel, hardened steel, stainless, aluminium, nylon and nonmetallic (phenolic).
Basic safety PROVISION: Worm gearing should not be used since a locking mechanism to carry large weights where reversing action could cause harm or damage. In applications where potential damage is nonexistent and self-locking is desired against backward rotation then use of a single thread worm with a low helix angle instantly locks the worm gear drive against backward rotation.
RATIOS of worm gear sets are determined by dividing the number of teeth in the gear by the number 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 are offered with Single, Double, Triple and Qua-druple Threads.
LUBRICATION can be an essential factor to boost performance in worm gearing. Worm gear action generates considerable warmth, decreasing efficiency. The amount of power transmitted at a given temperature boosts as the performance of the gearing increases. Proper lubrication enhances effectiveness by reducing friction and temperature.
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