The pulleys for these joint belts come as two types, Pilot bore, meaning that the pulley has a factory machined nominal hole through the centre. These pulleys will have to be reworked to suit the size of shaft and any keyway and grub screws required. The other type of pulley is the taper lock version. Once the diameter of the pulley is ascertained a matching taper lock bush will need to be purchased to suit the diameter of the shaft. Standard keyways are factory machined to suit and this is fitted to the shaft prior to the pulley. The pulley is then fitted onto the bush and locked into place with grub screws supplied with the bush. The taper lock version is superior in the fact that once the bush is fitted any pulley can be changed with ease when needed instead of having to wait for it to be reworked thus cutting out the down time.
There are different sizes of belt/pulley section and styles of wedge belt.