BlackStar 60BS58 2 3/16 K2S - 60 Pitch Finished Bore Sprocket - 58 Tooth - 2-3/16" Bore 20M Section Prefer our D&D Global equivalent:

Prefer our D&D Global equivalent: 16/B55 Banded V-Belt

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so a 16/BK131 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

BlackStar 60BS58 2 3/16 K2S - 60 Pitch Finished Bore Sprocket - 58 Tooth - 2-3/16" Bore 20M Section Prefer our D&D Global equivalent:The BlackStar 60BS58 2 3 16 K2S is a 60 pitch Finished Bore roller chain sprocket with 58 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 3 16" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 60BS58 2 3 16 K2S Chain Pitch 60 Number of Teeth 58 Bore Size 2 3 16" Minimum Bore 1 3 8" Maximum Bore 2 7