Such positioning can be accomplished by providing {HEAD ~ a plurality} of {TAIL ~ unequally spaced key slots} or the like in the disc, by providing a single key or spline on the shaft for engaging one of the key slots 
of
Such positioning can be accomplished by providing { HEAD ~ a plurality } of { TAIL ~ unequally spaced key slots } or the like in the disc , by providing a single key or spline on the shaft for engaging one of the key slots
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH