BlackStar DS50A21H - Double-Single 50 Pitch A-Plate Sprocket - 21 Tooth 1.5/8" com/s/files/1/0666/7721/files/WrappedVBelt_5f41b9f5-d71a-4720-8d30-a0deb81eae18

com/s/files/1/0666/7721/files/WrappedVBelt_5f41b9f5-d71a-4720-8d30-a0deb81eae18

so a 150AT10/500US from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

3280-8M-50 Timing Belt

Belt Section C Sub-Type Banded Width 7/8" Thickness 17/32" Length 420 in Number of Bands 6 Material Neoprene Reinforcement Polyester Cord Color Black Temperature Range -30°F to 185°F

BlackStar DS50A21H - Double-Single 50 Pitch A-Plate Sprocket - 21 Tooth 1.5/8" com/s/files/1/0666/7721/files/WrappedVBelt_5f41b9f5-d71a-4720-8d30-a0deb81eae18The BlackStar DS50A21H is a 50 pitch double single strand A Plate roller chain sprocket with 21 teeth, precision manufactured from SAE 1045 steel and features machine cut tooth profiles for smooth, reliable chain engagement. Specifications Part Number DS50A21H Chain Pitch 50 Number of Teeth 21 Bore Type Plain Bore Hub Style A Plate Strand Count Double Single Material Steel Outside Diameter 4. 52" Pitch Diameter 4. 194" Approx. Weight 4. 800 lbs Cross