Martin D40P21H Type 12 Double Strand Solid Bushed Roller Chain Sprocket With Recess Groove and Hardened Teeth, 1/2 to 1-3/4 in Dia Bore, 3.617 in OD, #40 Chain, 21 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, 1/2 to 1-3/4 in Bore, 3.617 in OD, #40 Chain, 21 Teeth, 1/2 in Pitch, 3.3548 in Pitch Diameter, 3 in Diameter Hub, 3/8 in Keyway, 1-1/2 in Length Through Bore, MST® P1 Bushing, Steel
| Bushing Type | : | MST® P1 |
| Bore Diameter | : | 1/2 to 1-3/4 in |
| Outside Diameter | : | 3.617 in |
| Chain Size | : | #40 |
| Number of Teeth | : | 21 |
| Pitch | : | 1/2 in |
| Material | : | Steel |
| Keyway Size | : | 3/8 in |
| Hub Diameter | : | 3 in |
| Type | : | Type 12 Double Strand Solid Bushed |
| Pitch Diameter | : | 3.3548 in |
| Length Through Bore | : | 1-1/2 in |
VIDEO LINK
https://www.youtube.com/watch?v=fSomOMNB_-Q