Martin D40CTB60 Double Strand TB Bushed Solid Type C Single Roller Chain Sprocket, 9.841 in OD, 40-2 Chain, 60 Teeth, 1/2 in Pitch, Steel
A taper bushed sprocket is a sprocket where a tapered bushing is bolted into the taper bore that is machined in the sprocket. When installed this bushing is compressed onto the shaft providing a tight grip. Taper bushed sprockets have a tapered bushing bolted into a taper bore with hex head set screws instead of bolts.
Martin Single Roller Chain Sprocket, Double Strand TB Bushed Solid Type C, 9.841 in Outside Dia, 40-2 Chain, 60 Teeth, 1/2 in Pitch, 9.554 in, 4-1/4 in Hub Dia, 1-3/4 in Length Through Bore, 2517 Taper Lock Bushing, Steel