Roller chain drives have the ability to handle high shock loads and deliver dependable performance make them the drive of choice for many applications. Dodge Taper-Lock sprockets require no expensive or time-consuming re-matching. Their taper-bushing mount automatically compensates for variations in shaft and sprocket machining tolerances. With Dodge Taper-Lock sprockets, there are no protruding flanges or screw-heads to take up valuable shaft space. Their compact design provides for more power-dense packages. Dodge Roller Chain Sprocket, Single Strand Taper Lock Type BTL, 1/2 in Bore Dia, 6.498 in Outside Dia, #120 Chain, 12 Teeth, 5.796 in, 3.56 in Hub Dia, 2-1/8 in Maximum Bore, 1-1/4 in Length Through Bore, Low-Carbon Steel No slip transmissionMinimal overhung load on shaft bearingsGenerally used in lower speed rangesLow cost and rugged performanceCompact drive designInstalls easilyFits shaft securelyAllows exact ratio and rating required for your operationInstallation-ready, right from the boxFor 1-1/2 in pitch single strand chain