The split tapered bushing is a flanged bushing.  Split tapered bushings are used to mount pulleys, sprockets, and sheaves on shafts as the shaft transmits torque. The split tapered bushing alleviates the need to have a component bored to size, which should reduce the number of units needed on hand and allowing for variations in shaft diameter. The barrel of the split tapered bushing is split in two places and is keyed to the shaft. The barrel outer diameter (OD) is also keyed to the drive component. The design advantage of the split tapered bushing is it will hold the component to the shaft, even if the fasteners become loose. Split tapered bushings are interchangeable between manufacturers.