Adjustable sheave

摘要

An adjustable sheave including at least one pair of annular belt grooves defining annular discoidal flange members relatively movable on an end threaded hub support through an annular adjusting ring threadedly mounted on the threaded hub support end, the adjusting ring including locking means cooperable with one of the pair of flange members to tighten and bind the threads of the adjusting ring to the engaged threads of the hub support end.