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57 mm Black Magic

57 mm Aluminum Block — German Admirals Mainsheet System

Part No. HC7798
  Not available on-line. Please contact Harken.
Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Maximum line Ø (mm)12 mm
Maximum line Ø (in) 7/16 in
Maximum working load (kg)2200 kg
Maximum working load (lb)4850 lb

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.

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

Sheave Ø (mm)57 mm
Sheave Ø (in)2 1/4 in
Weight (g)265 g
Weight (oz)9.4 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)2200 kg
Maximum working load (lb)4850 lb
DWG: HC7798.DWG (open/save)
DXF: HC7798.DXF (open/save)
IGS: HC7798.IGS (open/save)

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

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