Martin D40SK54 Type C Double Strand Solid Bushed Roller Chain Sprocket, 1/2 to 2-5/8 in Dia Bore, 8.885 in OD, #40 Chain, 54 Teeth, 1/2 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 C Double Strand Solid Bushed, 1/2 to 2-5/8 in Bore, 8.885 in OD, #40 Chain, 54 Teeth, 1/2 in Pitch, 8.599 in Pitch Diameter, 4 in Diameter Hub, 1-1/4 in Length Through Bore, QD® SK Bushing, Steel
| Bushing Type | : | QD® SK |
| Bore Diameter | : | 1/2 to 2-5/8 in |
| Outside Diameter | : | 8.885 in |
| Chain Size | : | #40 |
| Number of Teeth | : | 54 |
| Pitch | : | 1/2 in |
| Material | : | Steel |
| Hub Diameter | : | 4 in |
| Type | : | Type C Double Strand Solid Bushed |
| Length Through Bore | : | 1-1/4 in |
| Pitch Diameter | : | 8.599 in |
VIDEO LINK
https://www.youtube.com/watch?v=fSomOMNB_-Q