BlackStar 1-3V280JA - QD Sheave Series-XTB60 What does the T5US in

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Bore Size 45mm Housing Style 2-Bolt Flange Block Insert Series UC Shaft Attachment Set Screw Housing Material Cast Iron Bearing Type Ball Bearing Lubrication / Seal L3 Heavy-Duty Dynamic Load Rating 7

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BlackStar 1-3V280JA - QD Sheave Series-XTB60 What does the T5US inThe BlackStar 1 3V280JA is a 1 groove qd sheave for 3V section belts, manufactured from cast iron. Requires a QD Type JA Bushing (sold separately). Specifications Part Number 1 3V280JA Product Type QD Sheave Number of Grooves 1 Belt Profile 3V Outside Diameter 2. 80" Bushing Required QD Type JA Bushing Material Cast Iron Approx. Weight 0. 700 lbs Pitch Diameter 28. 0" Compatible Belts 3V Bushing Required This sheave requires a QD Type JA Bushing to