BlackStar H60BS19 1 3/8 K2S - 60 Pitch Finished Bore Sprocket - 19 Tooth - 1-3/8" Bore 1.5/8" The SPA1632 is used for

The SPA1632 is used for general-purpose industrial drives

The AX77 is used for hvac blowers and air handlers

"name": "Is 12/C79 the same as other brands' 12/C79

so a 16/BK191 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

Cross-references: Browning 80A39

BlackStar H60BS19 1 3/8 K2S - 60 Pitch Finished Bore Sprocket - 19 Tooth - 1-3/8" Bore 1.5/8" The SPA1632 is used forThe BlackStar H60BS19 1 3 8 K2S is a 60 pitch Finished Bore roller chain sprocket with 19 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 3 8" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number H60BS19 1 3 8 K2S Chain Pitch 60 Number of Teeth 19 Bore