Combination Groove - All Browning B5V Sheaves permit the running of A, 4L, B, 5L 5V Belts to be run in them, thus providing a variety of different pitch diameters and horsepowers. Broad horsepower coverage - The B5V is available in 1 through 6 grooves allowing it to cover from 5 to 125 horsepower drives Incorporates Browning Split Taper Bushing - The only bushing system that provides a true Key-to-Key drive to both the shaft and the hub. New Casting design - The B5V castings were developed using CAD and Finite Elements Analysis to determine where to add and eliminate material. 1B5V278 V-Belt Pulleys - A, B, 5V Belt Section, 1 Groove, 27.9000 in (5V) 27.5000 in (A) 28.1000 in (B) Pitch Dia., 28.0800 in O.D., Split Taper Bushed, B Series Bushing, Cast Iron Material Belt Section Size B, A, 5V Bore Type Split Taper Bushed Bushing Bore Range 0.500 - 2.438 in Bushing Series B CAD Drawing Click here Datum Diameter 27.3000 in (A) 27.8000 in (B) Keyway Size 0.5000 in Manufacturer Upc Number 662289033720 Manufacturer Catalog Number 1B5V278 Manufacturer Product Page Click here Material Cast Iron Number Of Grooves 1 Outside Diameter 28.0800 in Pitch Diameter 27.9000 in (5V) 27.5000 in (A) 28.1000 in (B) Weight 38.20 lbs