Martin 100A31 Stock Bore Type A Single Pitch Roller Chain Sprocket, 1-1/4 in Dia Bore, 13.042 in OD, #100 Chain, 31 Teeth, 1-1/4 in Pitch, Steel
A plates are flat sprockets with no hub extension on either side. They can be altered for your application with bolt holes, custom bores, hardened teeth or special hubs welded to them.
Martin Single Pitch Roller Chain Sprocket, Stock Bore Type A, 1-1/4 in Bore Dia, 13.042 in Outside Dia, #100 Chain, 31 Teeth, 1-1/4 in Pitch, 12.356 in, 3-5/16 in Hub Dia, 0.692 in Length Through Bore, Steel
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