Gears & Gear Drives - Regal Beloit
worm and wheel pitches so propor-tioned that movement of the wheel ro-tates the worm. In most worm gears, the wheel has teeth similar to those of a helical gear, but the tops of the teeth curve inward to envelop the worm. As a result, the worm slides rather than rolls as it drives the wheel. Because of this high level of rubbing between the worm