Martin 40A28 Stock Bore Type A Single Pitch Roller Chain Sprocket, 5/8 in Dia Bore, 4.738 in OD, #40 Chain, 28 Teeth, 1/2 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, 5/8 in Bore Dia, 4.738 in Outside Dia, #40 Chain, 28 Teeth, 1/2 in Pitch, 4.466 in, 3-1/4 in Hub Dia, 0.284 in Length Through Bore, Steel
| Bore Diameter | : | 5/8 in |
| Chain Size | : | #40 |
| Hub Diameter | : | 3-1/4 in |
| Length Through Bore | : | 0.284 in |
| Material | : | Steel |
| Number of Teeth | : | 28 |
| Outside Diameter | : | 4.738 in |
| Pitch Diameter | : | 4.466 in |
| Pitch | : | 1/2 in |
| Type | : | Stock Bore Type A |