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The efficiency of a worm gear transmission depends to a big extent on the helix angle of the worm. Multi-threaded worms and gears with higher helix angles have proven to be 25% to 50% a lot more effective than solitary-threaded worms. The sliding motion of the worm meshing with or meshing with the worm gear final results in considerable friction and reduction of effectiveness in comparison to other kinds of gears. Improve effectiveness with hardened and floor worm swap bronze worm gears.