The inner and outer components of the SH bushing are threaded to correspond to a divided taper angle. A nut with screws is fitted to the inner component. When the screws are tightened, the outer component is subject to axial pressure and "climbs" up the thread on the inner component. The slotted inner component will be pressed against the shaft and the outer component, if slotted, will be pressed against the hub (fig 1).
Key joints can be dispensed withWith SH bushings there is no need to increase the shaft diameter and no need for lost time machining keyways and axially securing the joint.
The hub is thereHub/shaft assemblies often need some form of intermediate hub. Either as an integral part of the hub proper or welded into it.
The SH bushing is made of weldable steel. With an unslotted outer component (SHR), it can be welded directly into the hub bore.
It acts as an intermediate hub and saves time and material.