Browning BK105HD101 4 Inch Single Groove Pulley

Browning BK105H is a 10.25-inch outside-diameter, single-groove V-belt pulley from the BK H family, designed to drive with a single belt path. Its combination groove design accepts A (4L) and B (5L) belts in a 1‑groove pulley, giving flexible belt-pitch options without swapping pulleys. The pulley is cast iron and commonly sold in a bushing-type configuration; mounting requires a separate bushing, and the bore is a split-taper type with standard options typically ranging from 3/8 inch to 1-1/2 inches depending on the exact variant. This BK105H designation is widely cataloged as a 10.25 OD, 1-groove pulley compatible with A/4L and B/5L belts, with bushings sold separately by many suppliers. For precise bore and hub options (including codes like D101 in some listings), verify the exact variant with the supplier’s product page to ensure the correct bore size and mounting method.