TB Woods AK3058 FHP Bored-to-size V-Belt Sheave, A Belt Section, 1 Groove, 5/8" Bore, Cast Iron, 3.05" OD, 8200 max rpm Classical V-belt sheave fits widely available, classical profile V-belts suitable for use in many existing drive designs Cast iron for resistance to wear and galling A belt or cross section One groove for single belt use