BlackStar 4B74SK - QD Sheave 3.5/8" The BlackStar J 4 3/16

The BlackStar J 4 3/16 is a J series qd bushing with a 4 3/16" finished bore

The 550J39 Micro V Belt J Section 55in OC 39 Ribs Diesel Belting is a Micro-V (multi-ribbed) belt with Micro-V J-section dimensions

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The PIX 8V3000 Industrial V-Belt is a standard V-belt featuring Narrow wedge 8V dimensions

BlackStar 4B74SK - QD Sheave 3.5/8" The BlackStar J 4 3/16The BlackStar 4B74SK is a 4 groove qd sheave for B section belts, manufactured from cast iron. Requires a QD Type SK Bushing (sold separately) to mount to your shaft. Specifications Part Number 4B74SK Product Type QD Sheave Number of Grooves 4 Belt Profile B Outside Diameter 7. 75" Material Cast Iron Approx. Weight 14. 000 lbs Bushing Required QD Type SK Bushing Pitch Diameter 7. 4" Compatible Belts A, B, 4L, 5L Bushing Required This sheave requires a