A worm gear is a type of gear used in band saws or other machinery to transfer power or motion between non-parallel, non-intersecting shafts, typically at a 90-degree angle. Worm gears consist of a worm, which is a threaded shaft resembling a screw, and a worm wheel, which is a toothed wheel or gear. The worm engages the teeth on the worm wheel, providing a high reduction ratio, smooth and quiet operation, and the ability to hold a load in place due to the self-locking properties of the worm gear mechanism. Worm gears are commonly used in band saws for raising and lowering the blade guide or adjusting the blade tension, among other applications. Proper lubrication and maintenance of worm gears are essential for ensuring smooth operation and preventing wear or damage.