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||5 15/16 in||150 mm|
|Max Line Diameter||1 in||25 mm|
|Max Working Load||15,000 lb||6,802 kg|
|Breaking Load||30,000 lb||13,605 kg|
|Weight||85.34 oz||2,419 g|
|Length||11 1/8 in||283 mm|
|A (refer to picture)||3 3/4 in||95 mm|
|B (refer to picture)||5 5/32 in||131 mm|
|C (refer to picture)||3 5/8 in||92 mm|
Includes Padeye - Uses hole spacing and base dimensions of 629 padeye.
MAXIMUM WORKING LOAD DECREASES AT VARYING ANGLES