worm gear and worm wheel

The arrangement of gears seen above is called a worm and worm wheel. The worm, which in this example is certainly brown in colour, only has one tooth nonetheless it is like a screw thread. The worm wheel, coloured yellow-colored, is like a normal equipment wheel or spur equipment. The worm generally worm gear and worm wheel drives the worm wheel round, it is never the contrary way round as the system will lock and jam

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