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||4 15/16 in||125 mm|
|Max Line Diameter||3/4 in||19 mm|
|Max Working Load||11,000 lb||4,990 kg|
|Breaking Load||22,000 lb||9,977 kg|
|Weight||44.72 oz||1,268 g|
|Length||9 1/16 in||230 mm|
|A (refer to picture)||3 21/32 in||93 mm|
|B (refer to picture)||4 1/32 in||103 mm|
|C (refer to picture)||2 1/4 in||57 mm|
Includes Padeye - Uses hole spacing and base dimensions of 648 padeye.
MAXIMUM WORKING LOAD DECREASES AT VARYING ANGLES