Martin D40Q30H Type 12 Double Strand Solid Bushed Roller Chain Sprocket With Hardened Teeth, 0.75 to 2.688 in Dia Bore, 5.057 in OD, #40 Chain, 30 Teeth, 1/2 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 12 Double Strand Solid Bushed, 0.75 to 2.688 in Bore, 5.057 in OD, #40 Chain, 30 Teeth, 1/2 in Pitch, 4.7834 in Pitch Diameter, 4-1/4 in Diameter Hub, 1/2 in Keyway, 1-3/4 in Length Through Bore, MST® Q1 Bushing, Steel
| Bushing Type | : | MST® Q1 |
| Bore Diameter | : | 0.75 to 2.688 in |
| Outside Diameter | : | 5.057 in |
| Chain Size | : | #40 |
| Number of Teeth | : | 30 |
| Pitch | : | 1/2 in |
| Material | : | Steel |
| Keyway Size | : | 1/2 in |
| Hub Diameter | : | 4-1/4 in |
| Type | : | Type 12 Double Strand Solid Bushed |
| Pitch Diameter | : | 4.7834 in |
| Length Through Bore | : | 1-3/4 in |
VIDEO LINK
https://www.youtube.com/watch?v=fSomOMNB_-Q