Martin Accu-Torch® steel sprockets are available for virtually all engineering class chains in style A, B, and C. Also available as split with welded hub and split or solid detachable hub. They can also be furnished as shear pin type. Where possible please specify chain number, pitch diameter, number of teeth, bore and keyway size, and hub style required. Accu-Torch® sprockets are not intended to replace cut tooth roller chain sprockets. Martin Accu-Torch® Engineering Sprocket, Flame Cut Stock Bore Type A, 1-1/4 in Bore Dia, 10-3/4 in Outside Dia, 78 Chain, 12 Teeth, 2.609 in Pitch, 10.081 in, 5-1/4 in Hub Dia, 7/8 in Length Through Bore, Steel