BlackStar H40SDS45 - 40 Pitch QD Sprocket - 45 Tooth HL 3/A83 is a banded v-belt

3/A83 is a banded v-belt used on industrial drives - fans and blowers

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so the Megadyne 10/B158 interchanges with Gates

Specifications Part Number H40BS30 1 1/4 K2S Chain Pitch 40 Number of Teeth 30 Bore Size 1-1/4" Minimum Bore 5/8" Maximum Bore 1-1/2" Bore Type Finished Bore (Keyway + Set Screws) Hub Style Finished Bore Strand Count Single Material Steel Hardened Teeth Yes Outside Diameter 5

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BlackStar H40SDS45 - 40 Pitch QD Sprocket - 45 Tooth HL 3/A83 is a banded v-beltThe BlackStar H40SDS45 is a 40 pitch QD roller chain sprocket with 45 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 requires a QD Type SDS Bushing (sold separately). Specifications Part Number H40SDS45 Chain Pitch 40 Number of Teeth 45 Maximum Bore 2" Bore Type QD Hub Style QD Bushing Required QD Type