The Browning 3B86SK is a fixed-pitch, three-groove V-belt pulley (sheave) built for A- and B-section belts. Cast iron and designed for durability in power-transmission drives, it features an outer diameter of 8.95 inches and three grooves that accommodate Browning’s SK-series quick-detach bushings (QD bore). The model provides fixed pitch diameters of 8.58 inches for A-belts and 8.96 inches for B-belts, enabling precise, non-adjustable drive ratios within a single pulley. This combination-bore arrangement supports reliable mounting on a shaft with a Browning QD bushing, maintaining a rigid, positive-drive connection across belt types.
