Martin 25A60 Stock Bore Type A Single Pitch Roller Chain Sprocket, 1/2 in Dia Bore, 4.92 in OD, #25 Chain, 60 Teeth, 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, 1/2 in Bore Dia, 4.92 in Outside Dia, #25 Chain, 60 Teeth, 1/4 in Pitch, 4.777 in, 2 in Hub Dia, 0.11 in Length Through Bore, Steel
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