BlackStar 50BS57 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 57 Tooth - 1-3/8" Bore QD-W "text": "The 15/B133 has a

"text": "The 15/B133 has a 21/32\" width

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BlackStar 50BS57 1 3/8 K2S - 50 Pitch Finished Bore Sprocket - 57 Tooth - 1-3/8" Bore QD-W "text": "The 15/B133 has aThe BlackStar 50BS57 1 3 8 K2S is a 50 pitch Finished Bore roller chain sprocket with 57 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 3 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 50BS57 1 3 8 K2S Chain Pitch 50 Number of Teeth 57 Bore Size 1 3 8" Minimum Bore 1" Maximum Bore 1 15 16" Bore