BlackStar 100R70 - 100 Pitch R Sprocket - 70 Tooth AT10 com/products/d-and-d-3800-s8m-2080-timing-belt"

com/products/d-and-d-3800-s8m-2080-timing-belt"

"name":"Gates 4/B56 Hi-Power II PowerBand V-Belts"

Series QD-SK Bore Size 30mm Bore Type 30mm

so a 3/D270 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

BlackStar 100R70 - 100 Pitch R Sprocket - 70 Tooth AT10 com/products/d-and-d-3800-s8m-2080-timing-belt"The BlackStar 100R70 is a 100 pitch R roller chain sprocket with 70 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Requires a Split Taper Bushing (sold separately). Specifications Part Number 100R70 Chain Pitch 100 Number of Teeth 70 Bore Type Plain Bore Hub Style R Strand Count Single Material Steel Outside Diameter 28. 58" Pitch Diameter 27. 861" Approx. Weight 104.