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Specifications Part Number H78BS9 1 15/16 K2S Chain Pitch 78 Number of Teeth 9 Bore Size 1-15/16" Bore Type Finished Bore (Keyway + Set Screws) Hub Style Finished Bore Strand Count Single Material Steel Hardened Teeth Yes Approx
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BlackStar H80SF21 - 80 Pitch QD Sprocket - 21 Tooth 6.7/16" Specifications Part Number H78BS9 1The BlackStar H80SF21 is a 80 pitch QD roller chain sprocket with 21 teeth, precision manufactured from SAE 1045 steel with induction hardened teeth for extended wear life and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a QD Type SF Bushing (sold separately). Specifications Part Number H80SF21 Chain Pitch 80 Number of Teeth 21 Maximum Bore 2 15 16" Bore Type QD Hub Style QD Bushing Required QD Type
