BlackStar 80BS45 2 1/2 K2S - 80 Pitch Finished Bore Sprocket - 45 Tooth - 2-1/2" Bore 2.9/16" so a 6/B154 from any

so a 6/B154 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

9 in (Outside Circumference)

"text": "6/5VX1600 is a banded v-belt used on industrial drives - fans and blowers

com/s/files/1/0666/7721/products/Micro_VBelt_stock_photo_edit_f7a9f4dc-2f0f-4920-af00-aec4df6953e1

BlackStar 80BS45 2 1/2 K2S - 80 Pitch Finished Bore Sprocket - 45 Tooth - 2-1/2" Bore 2.9/16" so a 6/B154 from anyThe BlackStar 80BS45 2 1 2 K2S is a 80 pitch Finished Bore roller chain sprocket with 45 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 1 2" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 80BS45 2 1 2 K2S Chain Pitch 80 Number of Teeth 45 Bore Size 2 1 2" Minimum Bore 1 3 8" Maximum Bore 2 15 16"