Boston Gear UN stepped worm shaft, 1-7/16 in diameter, keyed, 13-1/2 in long. This worm shaft is designed for worm gear drive assemblies and uses a key to secure the connection between the shaft and a mating gear. The stepped geometry provides multiple diameters along its length within a 13-1/2 in overall length, accommodating systems that require a stepped shaft in a single component.
