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||2 1/4 in||57 mm|
|Length||5 1/2 in||140 mm|
|Weight||5.95 oz||169 g|
|Shackle pin Ø||1/4 in||6 mm|
|Maximum line Ø||7/16 in||12 mm|
|Maximum working load||1655 lb||750 kg|
|Breaking load||3310 lb||1500 kg|