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