Harken 178 mm Big Boat Sheave

Big Boat sheaves are available for special applications as well as for replacement sheaves in Big Boat blocks. Made of hardcoat-anodized, PTFE-impregnated 6061-T6 aluminum, sheaves feature Torlon® rollers to carry high radial loads and carbon-black Delrin® balls to support sideloads and provide UV protection.

Delrin® is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.


  • Breaking load (kg) 12698
  • Center pin Ø (mm) 38
  • Fasteners (mm) 12
  • Maximum line Ø (mm) 22
  • Maximum working load (kg) 6349
  • Sheave Ø (mm) 178
  • Weight (g) 1280

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