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Harken 57mm Aluminum Footblock w/ Lockoff

Item #

3221

Product Description

Harken 57mm Aluminum Footblock w/ Lockoff

The entire line of Black Magic® AirBlocks® has been redesigned with a sleek new look. Their unique, performance-packed engineering remains exactly the same.

Carrying some of the highest loads imposed by running rigging, these strong, lightweight blocks feature Torlon® roller bearings housed in a center cage. Rollers stay parallel for low-friction efficiency. Sculpted hardcoat-anodized aluminum sideplates protect sideload ball bearings. Dissimilar metals are isolated to minimize corrosion. Blocks are easily disassembled with a single hex wrench.

Either metric or imperial flathead fasteners may be used for mounting and are not exposed.

Specifications:

  • Sheave Ø - 2 1/4" (57mm)

  • Length - 3 5/16" (84mm)

  • Height - 1" (25mm)

  • Weight - 5.44 oz (154 g)

  • Maximum line Ø - 7/16" (12mm)

  • Maximum working load - 2500 lb (1134 kg)

  • Breaking load - 5000 lb (2268 kg)

  • Number of fasteners - 4

  • Fasteners - 1/4 FH in (6 FH mm)

  • A 9/32" (7mm)

  • B - 7/8" (23mm)

  • C - 2 1/32" (52mm)

  • D - 5/8" (16mm)

  • E - 2 9/32" (58mm)

  • F - 3 5/16" (84mm)

  • G - 15/32" (12mm)