Aside from gear ratio, the most important factor that determines efficiency is the contact pattern between worm and mating gears. Manufacturing the reducer housing, and worm and gear subassemblies creates a stack up of tolerances, so the position of the gear-tooth... For far more details.: Mobile/Whatpp: +8613083988828 EPG is a skilled company and exporter that is concerned with the design, improvement and generation.Our products are promoting well in Chinese marketplaces and some items sold in global markets are effectively... 