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Metric Worm Gears

Featured Product from KHK USA, Inc.

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Large Speed Reduction With Small Volume

Worm gear pairs are made up of a worm and a worm wheel. These gears allow for a very large reduction ratio in a single pair. They are very quiet and provide smooth transmission of power. Due to the situation of being a friction drive mechanism, worm gear pairs have very poor efficiency. Similar to helical gears, worm wheels are also cylindrical disks which have involute shaped teeth cut into their face at an angle. For worm gear pairs, this is the lead angle and it is identical to the angle cut into the worm. The reduction ratio of a worm gear pair is developed as the ratio of the number of teeth on the worm wheel / the number of starts on the worm. As with helical gears, worm gear pairs must have the same module, pressure angle and direction of lead angle in order to mesh. Our worm gear pairs are offered in many materials, modules, numbers of teeth and reduction ratios. All of the worm wheels that we offer allow for secondary operations such as opening the bore, adding of keyways, adding of tapped holes, and the reduction of the hub diameter to be performed. Most of the worms that we offer allow for secondary operations such as opening the bore, adding of keyways, adding of tapped holes, and the reduction of the hub diameter or shaft diameter to be performed. Our offering also includes products which have already had some of these secondary operations completed. These products are identified by a "J" in their part number and they are available within 10 calendar days.

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