BlackStar 80BS56 2 1/4 K2S - 80 Pitch Finished Bore Sprocket - 56 Tooth - 2-1/4" Bore Tapered Roller Bearing 250-S5M-305 has a 5 mm

250-S5M-305 has a 5 mm tooth pitch

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BlackStar 80BS56 2 1/4 K2S - 80 Pitch Finished Bore Sprocket - 56 Tooth - 2-1/4" Bore Tapered Roller Bearing 250-S5M-305 has a 5 mmThe BlackStar 80BS56 2 1 4 K2S is a 80 pitch Finished Bore roller chain sprocket with 56 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 1 4" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 80BS56 2 1 4 K2S Chain Pitch 80 Number of Teeth 56 Bore Size 2 1 4" Minimum Bore 1 3 8" Maximum Bore 2 15 16"