worm-gear reducer

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gear — gearless, adj. /gear/, n. 1. Mach. a. a part, as a disk, wheel, or section of a shaft, having cut teeth of such form, size, and spacing that they mesh with teeth in another part to transmit or receive force and motion. b. an assembly of such… … Universalium
Gunderson Do-All Machine — The Gunderson Do All Machine is a colorful, interconnected network of dozens of machines that have been cross sectioned to reveal their internal operating mechanisms. This artistic feat of engineering was designed by Mark Gunderson to serve as a… … Wikipedia
Cycloidal drive — For the marine propulsion system, see Voith Schneider. A cycloidal drive or cycloidal speed reducer is a mechanism for reducing the speed of an input shaft by a certain ratio. Cycloidal speed reducers are capable of high ratios in compact sizes.… … Wikipedia

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