Harken 57mm Low Load Double Block (HK3228)

Harken 57mm Low Load Double Block

Harken
SKU:
HK3228
|
UPC:
97653264682
$896.15
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Description

Black Magic Air blocks are a top favorite of Big Boat performance racers and cruisers. These lightweight, free-running, powerful performers are used for sail controls that see lots of action: mainsheet, runner, halyard, and spinnaker systems. A center cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting. Low-load blocks have red isolators. They use Torlon® rollers and 316 stainless steel shackles. Standard blocks have 17-4 PH stainless headposts.

Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.

Part no. 3228: 57mm Aluminum Low-Load Double Block - Swivel

Specifications

  • Sheave Ø (mm) 57 mm
  • Sheave Ø (in) 2 1/4 in
  • Length (mm) 132 mm
  • Length (in) 5 3/16 in
  • Weight (g) 342 g
  • Weight (oz) 12.05 oz
  • Shackle pin Ø (mm) 8 mm
  • Shackle pin Ø (in) 5/16 in
  • Maximum line Ø (mm) 12 mm
  • Maximum line Ø (in) 7/16 in
  • Maximum working load (kg) 1250 kg
  • Maximum working load (lb) 2755 lb
  • Breaking load (kg) 2500 kg
  • Breaking load (lb) 5510 lb

 

Resources/References