BlackStar 120S40 - 120 Pitch Split Taper Sprocket - 40 Tooth Metric Cogged "name":"Gates 11/A75 Hi-Power II PowerBand

"name":"Gates 11/A75 Hi-Power II PowerBand V-Belts 909211075"

"name":"Gates 2400-8MGT-12 PowerGrip GT4 Belts - 8M and 14M"

3430V424 Cogged V-Belt

so a 12/C85 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar 120S40 - 120 Pitch Split Taper Sprocket - 40 Tooth Metric Cogged "name":"Gates 11/A75 Hi-Power II PowerBandThe BlackStar 120S40 is a 120 pitch Split Taper roller chain sprocket with 40 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. This sprocket requires a Split Taper Bushing (sold separately). Specifications Part Number 120S40 Chain Pitch 120 Number of Teeth 40 Bore Type Plain Bore Hub Style Split Taper Bushing Required Split Taper Bushing Strand Count Single Material Steel