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, Bored-to-Size Solid Hub Type C, 3-7/16 in Bore Dia, 16.303 in Outside Dia, 124 Chain, 12 Teeth, 4 in Pitch, 15.45 in, 6-1/4 in Hub Dia, 3/4-10 x 3/4 in Screw, 7/8 x 7/16 in Keyway, 4-3/4 in Length Through Bore, Steel