Worm gears (or wormwheel gears) and worms (or worm drives) are made to work together to Enveloping Worm Gear transfer movement between nonintersecting shaft at correct angles. Worm gears and worms, which resemble spur gears and screws, respectively, combine to supply a high reduction ratio in a compact gear system. Our floor worm gears and ground worms are engineered for remarkably smooth and quite operation.