The Harken Black Magic Air Blocks have been redesigned with a sleek new look. Their unique, performance packed engineering remains exactly the same.
Used on offshore boats, these strong, lightweight blocks feature free-rolling, high load Torlon® roller bearings for a high strength-to-weight ratio and reduced wear. Rollers are housed in a center cage and stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion.
Like all Air Blocks, the three-way head can be locked in either direction or can swivel freely to keep line from twisting.
Sheets, Halyards, Running Backstays, Control Lines
|Sheave Diameter||2 15/16 in||75 mm|
|Max Line Diameter||9/16 in||14 mm|
|Max Working Load||5,000 lb||2,268 kg|
|Breaking Load||10,000 lb||4,536 kg|
|Weight||15.6 oz||442 g|
|Length||5 15/16 in||151 mm|
|A (refer to picture)||3 in||76 mm|
|B (refer to picture)||3 in||76 mm|
|C (refer to picture)||1 11/16 in||43 mm|
Includes Padeye - Uses hole spacing and base dimensions of 627 padeye.
MAXIMUM WORKING LOAD DECREASES AT VARYING ANGLES