A worm gearbox consists of a cylinder with a spiral groove mounted on a
shaft. A gear meshes with the spiral groove on the cylinder, and when the
cylinder rotates, it causes the gear to rotate also.
A worm drive produces a large gearing ratio in a compact size. For every
rotation of the worm gear shaft, the output radial gear rotates by only 1 tooth.
The output drive shaft is at 90 degrees to the input shaft.
These are compact, heavy-duty drives that offer long-life performance features
and simplified maintenance. They include double and triple reduction units. They
are available in a variety of configurations for maximum positioning
flexibility. They offer good strength and durability. The high strength output
shaft assures capacity for high torque and overhung loads.