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The GEARBOX EFFICIENCY The operating efficiency of worm-gear reducers ranges from 50% to as high as 95%. A number of factors influence efficiency, including ratio, input speed, tooth geometry, and lubrication. By far, the most important of these is ratio. A lower-ratio unit (5:1 for example) has more threads on the worm and a higher helix angle compared to a high-ratio unit. Higher helix angles mean less sliding friction and hence, higher efficiency. By comparison, helical gears typically have a 98% efficiency per gear mesh. For example, a double-reduction helical reducer has an efficiency approximately 0.98 3 0.98 = 96%. dc motor worm gear group China worm and worm gear explanation has taken part in the ma ept and revising of ISO/TC100 international chain standard several years in success and hosted the 16th ISO/TC100 International annual meeting in 2004.
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