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The BlackStar 50BS59 1 3/8 K2S is a 50 pitch Finished Bore roller chain sprocket with 59 teeth
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BlackStar 4-3V500SDS - QD Sheave Series-Q3 The BlackStar 50BS59 1 3/8The BlackStar 4 3V500SDS is a 4 groove qd sheave for 3V section belts, manufactured from cast iron. Requires a QD Type SDS Bushing (sold separately). Specifications Part Number 4 3V500SDS Product Type QD Sheave Number of Grooves 4 Belt Profile 3V Outside Diameter 5. 00" Bushing Required QD Type SDS Bushing Material Cast Iron Approx. Weight 5. 200 lbs Pitch Diameter 50. 0" Compatible Belts 3V Bushing Required This sheave requires a QD Type SDS Bushing
