BlackStar 41BS72 1 1/2 K2S - 41 Pitch Finished Bore Sprocket - 72 Tooth - 1-1/2" Bore Megadyne so the Megadyne 5/8V4750 interchanges

so the Megadyne 5/8V4750 interchanges with Gates

The 3/BK115 is a banded v-belt from D&D Global's Dura-Ultimate Band Classical - B Series line

"name":"D&D Global 16/SPA1657 V-Belt — SPA Section

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BlackStar 41BS72 1 1/2 K2S - 41 Pitch Finished Bore Sprocket - 72 Tooth - 1-1/2" Bore Megadyne so the Megadyne 5/8V4750 interchangesThe BlackStar 41BS72 1 1 2 K2S is a 41 pitch Finished Bore roller chain sprocket with 72 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket has a 1 1 2" bore with keyway and set screws and is ready for immediate installation. Specifications Part Number 41BS72 1 1 2 K2S Chain Pitch 41 Number of Teeth 72 Bore Size 1 1 2" Minimum Bore 3 4" Maximum Bore 2 3 4" Bore