Two designs are available, SHT and SHR, to have the mounting system that fits the application.
SKF SHT bushings
SHT (fig 1), delivered with a slotted outer sleeve, locks the application with pressure and friction. Only a cylindrical bore is needed in the hub.
SKF SHR bushings
SHR (fig 2), delivered with a non-slotted outer sleeve, for use when welding components onto the SH bushing, e.g. a lever.