Martin 120R18H MST® R1 Bushed Type 4 Welded Split Single Roller Chain Sprocket, 1-1/8 to 3-3/4 in Dia Bore, 9.407 in OD, 120 Chain, 18 Teeth, 1-1/2 in Pitch, 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 Split Single Roller Chain Sprocket, MST® R1 Bushed Type 4 Welded, 1-1/8 to 3-3/4 in Bore Dia, 9.407 in Outside Dia, 120 Chain, 18 Teeth, 1-1/2 in Pitch, 8.638 in, 5.406 in Hub Dia, 3/4 in W Keyway, 2-7/8 in Length Through Bore, Type R1 Split Taper Bushing, Steel