SDSX5/8 Bushing 

QD Bushing with 5/8" Bore

The tapered barrel on these steel bushings is split on one side. They're for use with split-tapered sprockets and pulleys of the same bushing style. As you tighten the included cap screws, the bushing grips the shaft and pulls it into the sprocket or pulley. Bushings have a 3° taper.All bushings have a standard ANSI keyway.