Martin 80R39 Type 4 Single Strand Welded Bushed Roller Chain Sprocket, 1-1/8 to 3-3/4 in Dia Bore, 12.987 in OD, #80 Chain, 39 Teeth, 1 in Pitch, Steel
Martin split taper sprocket is another style of bushed sprocket. The split taper bushing, when installed, offers a wide range of bore sizes.
Martin Roller Chain Sprocket, Type 4 Single Strand Welded Bushed, 1-1/8 to 3-3/4 in Bore, 12.987 in OD, #80 Chain, 39 Teeth, 1 in Pitch, 12.4275 in Pitch Diameter, 5-1/2 in Diameter Hub, 3/4 in Keyway, 2 in Length Through Bore, MST® R1 Bushing, Steel
| Bushing Type | : | MST® R1 |
| Bore Diameter | : | 1-1/8 to 3-3/4 in |
| Outside Diameter | : | 12.987 in |
| Chain Size | : | #80 |
| Number of Teeth | : | 39 |
| Pitch | : | 1 in |
| Material | : | Steel |
| Keyway Size | : | 3/4 in |
| Hub Diameter | : | 5-1/2 in |
| Type | : | Type 4 Single Strand Welded Bushed |
| Pitch Diameter | : | 12.4275 in |
| Length Through Bore | : | 2 in |
VIDEO LINK
https://www.youtube.com/watch?v=fSomOMNB_-Q