Worm Gears

Worm Gears


A worm gear is used when a large speed reduction ratio is required between crossed axis shafts which do not intersect.   A basic helical gear can be used but the power which can be transmitted is low.  A worm drive consists of a large diameter worm wheel with a worm screw meshing with teeth on the periphery of the worm wheel.   The worm is similar to a screw and the worm wheel is similar to a section of a nut.   As the worm is rotated the wormwheel is caused to rotate due to the screw like action of the worm.  The size of the worm gearset is generally based on the centre distance between the worm and the wormwheel.


RTR max size for worm gears is 2000mm.


Most worm gears are custom made.


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