BK45-7/8" ID 7/8" ( 0.875" ) Bore cast iron Solid Pulley - 4.25" OD for V-belts size 4L, 5L (BK4578)

BK Finished Bore Sheaves for (4L or A or 5L or B Belts) BK Sheaves are accurately machined from fine grained cast iron, statically balanced, They are furbished with Standard Keyseats and Hollow Head Setscrews The V-Belts you that can run in this pulley are 4L, or A or 5L, B, V-Belts. The belt series most common for this pulley is the 4L and A section. Keyway not included