Cast Pulleys are available in both taper bored (for use with a taper lock bush), and pilot bored (which can be machined out to suit the requiered shaft size)
taper lock bushes
TAPER LOCK BUSHES ARE A TAPERED, SPLIT BUSHING THAT USES SCREWS TO both lock THEM on TO THE SHAFT and in to the pulley itself.
THESE BUSHES ARE COMMONLY USED ON SPROCKETS AND PULLEYS
