Description
Harken 57mm Black Magic Air Triple Block is a top favourite 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 centre cage keeps Torlon® roller bearings separated and parallel to reduce friction. Shackle blocks lock in two directions or swivel to keep line from twisting.
Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
| Sku | Name | Sheave Ø mm (in) | Length mm (in) | Weight g (oz) | Maximum line Ø mm (in) | Maximum working load kg (lb) | Breaking load kg (lb) | Shackle pin Ø mm (in) |
|---|---|---|---|---|---|---|---|---|
| 3219 | 57 mm Black Magic Air Aluminium Triple Block — Swivel | 57 (2 1/4) | 132 (5 3/16) | 378 (13.34) | 12 (7/16) | 2200 (4850) | 4400 (9700) | 8 (5/16) |
