Roller Chain Sprocket, Type 12 Double Strand Solid Bushed, 1-1/8 to 3-3/4 Inch Bore, 14.901 Inch Outside Diameter, #80 Chain, 45 Teeth, 1 Inch Pitch, 14.3356 Inch Pitch Diameter, 5-1/2 Inch Diameter Hub, 3/4 Inch Keyway, 2 Inch Length Through Bore, MST® R1 Bushing, Steel

Martin split taper sprocket is another style of bushed sprocket. The split taper bushing, when installed, offers a wide range of bore sizes. Martin Roller Chain Sprocket, Type 12 Double Strand Solid Bushed, 1-1/8 to 3-3/4 in Bore, 14.901 in OD, #80 Chain, 45 Teeth, 1 in Pitch, 14.3356 in Pitch Diameter, 5-1/2 in Diameter Hub, 3/4 in Keyway, 2 in Length Through Bore, MST® R1 Bushing, Steel