BlackStar 3B52SD STL - QD Sheave A Section The D&D Global 320H1771 is

The D&D Global 320H1771 is a synchronous timing belt with H-pitch profile

v=1698982141"

The BlackStar 60SF44 is a 60 pitch QD roller chain sprocket with 44 teeth

so a 1080-8M-50 from any major manufacturer shares the same dimensions and runs on the same pulleys/sheaves

The 300J40 Micro V Belt J Section 30in OC 40 Ribs Diesel Belting is a Micro-V (multi-ribbed) belt with Micro-V J-section dimensions

BlackStar 3B52SD STL - QD Sheave A Section The D&D Global 320H1771 isThe BlackStar 3B52SD STL is a 3 groove qd sheave for B section belts, manufactured from cast iron. Requires a QD Type SD Bushing (sold separately) to mount to your shaft. Specifications Part Number 3B52SD STL Product Type QD Sheave Number of Grooves 3 Belt Profile B Outside Diameter 5. 55" Material Cast Iron Approx. Weight 8. 600 lbs Bushing Required QD Type SD Bushing Pitch Diameter 5. 2" Compatible Belts A, B, 4L, 5L Bushing Required This sheave