Browning BK57H Sheave

The Browning BK57H is a 1‑groove FHP cast‑iron belt pulley from the BK H family, designed for Browning V‑belt drives and compatible with A, 4L, B, and 5L belts to accommodate a range of power ratings without changing pulleys. It features a 5.45‑inch outside diameter, a 0.875‑inch (7/8‑inch) face width for stable belt seating, and a Split Taper bore capable of sizing from 3/8 inch to 1‑1/2 inches when used with Browning split‑taper bushings. The A and B belt pitch diameters are 4.9 inches and 5.4 inches, respectively, which defines the interaction between the belt cross section and the sheave to set drive ratios while maintaining a compact footprint. Cast‑iron construction provides rigidity and wear resistance for long service in demanding environments, making the BK57H a durable choice for small to mid‑size drives in industrial machinery and HVAC systems. Designed for reliable service in power‑transmission setups, the BK57H integrates with Browning's BK H lineup to support standard cross‑sections and proven belt alignment.