Martin E50SF60 Type B Triple Strand Solid Bushed Roller Chain Sprocket, 0.5 to 2.938 in Dia Bore, 12.301 in OD, #50 Chain, 60 Teeth, 5/8 in Pitch, Steel
QD (quick detachable) is a sprocket where a tapered bushing is bolted into the taper bore that is machined in the sprocket. When installed this bushing is compressed onto the shaft providing a tight grip.
Martin Roller Chain Sprocket, Type B Triple Strand Solid Bushed, 0.5 to 2.938 in Bore, 12.301 in OD, #50 Chain, 60 Teeth, 5/8 in Pitch, 11.942 in Pitch Diameter, 4-5/8 in Diameter Hub, 1-1/4 in Length Through Bore, QD® SF Bushing, Steel
| Bushing Type | : | QD® SF |
| Bore Diameter | : | 0.5 to 2.938 in |
| Outside Diameter | : | 12.301 in |
| Chain Size | : | #50 |
| Number of Teeth | : | 60 |
| Pitch | : | 5/8 in |
| Material | : | Steel |
| Hub Diameter | : | 4-5/8 in |
| Type | : | Type B Triple Strand Solid Bushed |
| Length Through Bore | : | 1-1/4 in |
| Pitch Diameter | : | 11.942 in |
VIDEO LINK
https://www.youtube.com/watch?v=fSomOMNB_-Q