Description
Harken 75mm Aluminum Low Load Block Swivel
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. The low-load block has a red isolator. It uses Delrin ball bearings, with a 17-4 PH stainless headpost and 316 stainless steel shackles. Torlon is a registered trademark of Solvay Advanced Polymers L.L.C.
Technical Description
| Sheave Ø (mm) | 75 mm |
| Sheave Ø (in) | 2 15/16 in |
| Length (mm) | 129 mm |
| Length (in) | 5 1/8 in |
| Weight (g) | 335 g |
| Weight (oz) | 11.82 oz |
| Shackle pin Ø (mm) | 8 mm |
| Shackle pin Ø (in) | 5/16 in |
| Maximum line Ø (mm) | 14 mm |
| Maximum line Ø (in) | 9/16 in |
| Maximum working load (kg) | 1361 kg |
| Maximum working load (lb) | 3000 lb |
| Breaking load (kg) | 2722 kg |
| Breaking load (lb) | 6000 lb |
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