BlackStar H50BS28 1 15/16 K2S - 50 Pitch Finished Bore Sprocket - 28 Tooth - 1-15/16" Bore XXH The C215 has a 7/8"

The C215 has a 7/8" width

The BlackStar D100B9H is a 100 pitch double strand B-Hub roller chain sprocket with 9 teeth

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"name": "What is the temperature rating of 10/B225

so a 1256-8M-50 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar H50BS28 1 15/16 K2S - 50 Pitch Finished Bore Sprocket - 28 Tooth - 1-15/16" Bore XXH The C215 has a 7/8"The BlackStar H50BS28 1 15 16 K2S is a 50 pitch Finished Bore roller chain sprocket with 28 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 has a 1 15 16" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H50BS28 1 15 16 K2S Chain Pitch 50 Number of Teeth