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