Martin 40B18 Stock Bore Type B Single Pitch Roller Chain Sprocket, 5/8 in Dia Bore, 3.136 in OD, #40 Chain, 18 Teeth, 1/2 in Pitch, Steel
B style sprockets are flat sprockets with a hub extension on one side. These plain bore sprockets can easily be bored to a metric or standard size to fit your application. Keyways, set screws and hardened teeth are quick alterations that can be made.
Martin Single Pitch Roller Chain Sprocket, Stock Bore Type B, 5/8 in Bore Dia, 3.136 in Outside Dia, #40 Chain, 18 Teeth, 1/2 in Pitch, 2.879 in, 2.313 in Hub Dia, 1 in Length Through Bore, Steel
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