Variable Pitch Sheave, Type S, M, 3-1/4 in od, 1 -Groove, Cast Iron

Maurey's Hi-Q variable pitch shieves permit variation of as much as 30% in speed when used with sheaves of fixed diameter. Hassle free adjustment is allowed by Maurey's patented internal key which locks down on it, with no need to remove parts. They are made of a cast iron construction and are zinc phosphated for rust resistance.