The ideal transmission decision is when substantial transmission reduction is necessary. A worm gear is equivalent to a helical equipment with a throat minimize to improve the outer diameter of the wheel. The throat enables the worm equipment to wrap fully all around the threads of the worm. By reducing the threads on the worm relatively than the teeth, and by adjusting the variety of threads, different ratios can be accomplished without shifting the mounting arrangement. A special attribute of worm gears and worm equipment assemblies is their potential to avoid reverse rotation.