BlackStar 80BS47 2 7/16 K2S - 80 Pitch Finished Bore Sprocket - 47 Tooth - 2-7/16" Bore 22mm so the Megadyne 5/D144 interchanges

so the Megadyne 5/D144 interchanges with Gates

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The 3/B71 is a banded v-belt from D&D Global's Dura-Prime Band Classical - B Series line

350-P5M-25 is a standardized industry size

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BlackStar 80BS47 2 7/16 K2S - 80 Pitch Finished Bore Sprocket - 47 Tooth - 2-7/16" Bore 22mm so the Megadyne 5/D144 interchangesThe BlackStar 80BS47 2 7 16 K2S is a 80 pitch Finished Bore roller chain sprocket with 47 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 2 7 16" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 80BS47 2 7 16 K2S Chain Pitch 80 Number of Teeth 47 Bore Size 2 7 16" Minimum Bore 1 3 8" Maximum Bore 2 15