mouseover to enlarge

Big Boat Sheaves

178 mm Sheave

Part No. 520
$996.65  Limited Quantities In Stock
Sheave Ø (mm)178 mm
Sheave Ø (in)7 in
Maximum line Ø (mm)22 mm
Maximum line Ø (in) 7/8 in
Maximum working load (kg)6349 kg
Maximum working load (lb)14000 lb

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.

Sheave Ø (mm)178 mm
Sheave Ø (in)7 in
Width (mm)29 mm
Width (in)1 1/8 in
Weight (g)1280 g
Weight (oz)45 oz
Center pin Ø (mm)38 mm
Center pin Ø (in)1 1/2 in
Fasteners (mm)12 mm
Maximum line Ø (mm)22 mm
Maximum line Ø (in) 7/8 in
Maximum working load (kg)6349 kg
Maximum working load (lb)14000 lb
Breaking load (kg)12698 kg
Breaking load (lb)28000 lb
DWG: 520.dwg (open/save)
DXF: 520.dxf (open/save)
IGS: 520.igs (open/save)
EPS: 520.eps (open/save)
High-res JPG: 520.jpg (open/save)

DO NOT use Harken Equipment for Human suspension.

  • United States
  • Australia
  • France
  • Italia
  • New Zealand
  • Polska
  • Sverige
  • UK