Product

HARKEN 57MM BLACK MAGIC LOOP BLOCK

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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. The sheave center carries primary load, allowing a smaller, lighter weight block.The soft-attachment Loop block has a removable deadend post for attachment to a padeye. Lashings can also be used.

Sheave Ø (mm)
57 mm

Sheave Ø (in)
2 1/4 in

Length (mm)
76 mm

Length (in)
3 in

Weight (g)
92 g

Weight (oz)
3.23 oz

Maximum line Ø (mm)
12 mm

Maximum line Ø (in)
7/16 in

Maximum working load (kg)
1134 kg

Maximum working load (lb)
2500 lb

Breaking load (kg)
2268 kg

Breaking load (lb)
5000 lb