BlackStar H80R23 - 80 Pitch R Sprocket - 23 Tooth 5VS-LB The D&D Global 11/CK243 is

The D&D Global 11/CK243 is a standard V-belt featuring Classical C-section dimensions

Prefer our Diesel Belting equivalent: T10-1100-10 Timing Belt T10 10mm x 1100mm OC Diesel Belting

Prefer our Megadyne equivalent: Megadyne 730H300 Timing Belt

so a 3/B123 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar H80R23 - 80 Pitch R Sprocket - 23 Tooth 5VS-LB The D&D Global 11/CK243 isThe BlackStar H80R23 is a 80 pitch R roller chain sprocket with 23 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. Specifications Part Number H80R23 Chain Pitch 80 Number of Teeth 23 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Hardened Teeth Yes Outside Diameter 7. 88" Pitch Diameter 7. 344"