BlackStar 4B66SD STL - QD Sheave 4.3/16" 170H200 is a timing belt

170H200 is a timing belt used on positive

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16/5VK2400 is a banded v-belt used on industrial drives — fans and blowers

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

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BlackStar 4B66SD STL - QD Sheave 4.3/16" 170H200 is a timing beltThe 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