Regal Beloit 2BK45H Sheave

Regal Beloit 2BK45H is a two-groove, cast-iron V-belt pulley (bushed) with a 4.25-inch outside diameter, engineered to reliably transmit rotational power in belt-drive systems across a wide range of industrial equipment, from motors and conveyors to fans and pumps. It is compatible with four common belt sections—4L, A, 5L, and B—and uses a replaceable bushing to fit shaft diameters from 3/8 inch to 1-1/2 inches, enabling flexible mounting on various shaft sizes and configurations. The durable cast-iron construction provides stiffness and abrasion resistance under heavy loads, while the two-groove geometry supports dual-drive configurations or parallel belt paths without requiring additional pulleys, idlers, or complex alignment. As part of Regal's Browning power-transmission family, the 2BK45H is a standard replacement pulley for industrial equipment, delivering dependable belt engagement and straightforward installation for conveyors, cooling fans, pumps, and other equipment where reliable belt-driven power transfer matters.