BlackStar 4B74SK - QD Sheave 3.5/8" The 550J39 Micro V Belt

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

85" Pitch Diameter 8

Martin 50A38

Specification Value Part Number 1778-P14M-20 Belt Type Timing Belt Tooth Profile P14M RPP (curvilinear) Tooth Pitch 14 mm Number of Teeth 127 Belt Width 20 mm Pitch Length 1778 mm (Pitch Length) Construction Chloroprene (Neoprene)

"mpn":"TB072053911503"

BlackStar 4B74SK - QD Sheave 3.5/8" The 550J39 Micro V BeltThe 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