The ideal transmission option is when high transmission reduction is needed. A worm gear is similar to a helical equipment with a throat lower to boost the outer diameter of the wheel. The throat permits the worm equipment to wrap fully around the threads of the worm. By chopping the threads on the worm instead than the enamel, and by changing the amount of threads, various ratios can be attained without having modifying the mounting arrangement. A distinctive feature of worm gears and worm gear assemblies is their potential to avoid reverse rotation.

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