BlackStar 4B66SD STL - QD Sheave 4.3/16" so a 16/BK136 from any

so a 16/BK136 from any major manufacturer shares the same cross-section and length and runs on the same sheaves

2/B72 is a banded v-belt used on industrial drives - fans and blowers

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170H200 is a timing belt used on positive

BlackStar 4B66SD STL - QD Sheave 4.3/16" so a 16/BK136 from anyThe BlackStar 4B66SD STL is a 4 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 4B66SD STL Product Type QD Sheave Number of Grooves 4 Belt Profile B Outside Diameter 6. 95" Material Cast Iron Approx. Weight 13. 600 lbs Bushing Required QD Type SD Bushing Pitch Diameter 6. 6" Compatible Belts A, B, 4L, 5L Bushing Required This sheave