Browning BK45X3 Fixed Pitch Sheave Three Quarter Inch Bore

The Browning BK45X3/4 fixed-pitch pulley is a one-groove, cast-iron BK sheave with a finished 3/4 in bore and a 4.250 in outside diameter, designed for reliable power transmission in belt-driven drives. It accepts 4L, 5L, A and B belt sections and provides two pitch diameters depending on belt type: 3.700 in (A) or 4.200 in (B), enabling use with multiple Browning belt styles without changing pulleys. Key specifications include a 0.1875 in keyway, a through-bore length of 1.1563 in, a face width of 0.875 in, and an overall width of 1.2813 in; the pulley is finished bore with a 2.12 lb weight and cast-iron construction for stiffness and durability. The BK45X3/4 designation denotes a 3/4 in bore, 1-groove, fixed-pitch pulley in Browning’s BK lineup, engineered for compatibility with standard BK accessories and typical belt-drive configurations where a finished bore is preferred and no separate bushing is required.