Harken 125mm Black Magic AirBlock Single loop

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Black Magic® AirBlocks®

Details Make the Difference

LOW-FRICTION CAGED BEARINGS

The center cage keeps Torlon® roller bearings separated and parallel

to reduce friction. Dirt and salt falls between rollers. Captive Delrin®

balls carry sideloads.

STRONG, LIGHTWEIGHT SIDEPLATES & SHEAVES

6061-T6 aluminum sideplates CNC sculpted to remove excess weight.

Thin-profile, deep-groove aluminum sheaves have radiused edges to

protect high-tech line.

LONG-LASTING PROTECTIVE FINISH

Sheaves and sideplates are deep-saturation Hardkote-anodized

for strength and durability, and UV-stabilized with black additive

for maximum protection. Teflon®-impregnated for a smooth,

slippery surface.

Strong, Lightweight

and Free Rolling

Weekend cruiser? Around-the-world racer? You’ll want Black

Magic® AirBlocks® aboard. With high strength-to-weight

ratios and free-rolling high-load roller bearings, these

versatile blocks are the workhorses of the Harken® line. Use

for sail controls that see lots of action including mainsheet,

runner, halyard, and

spinnaker systems.

AirBlocks® are very

easy to clean and

service. They have few

parts and no loose

balls or rollers to

misplace. Unlike blocks

that are riveted together,

three fasteners allow

quick disassembly for

service.

 

125 mm & 150 mm

125 mm and 150 mm AirBlocks® feature Torlon® rollers in a

self-contained center cage. Rollers stay parallel for low-friction

efficiency. UV-resistant, carbon-black Delrin® balls carry sideloads.

Used on offshore boats, these blocks offer a no “climb-out” deep

groove sheave with radiused edges to protect line. Sculpted aluminum

sideplates and thin-profile sheaves make these blocks very lightweight.

No stainless-to-aluminum contact prevents corrosion.

The 3201 soft attachment Loop block has a removable dead end

post for attachment to a padeye. Lashings can also be used.

Use for:

Sheets

Halyards

Running backstays

Control lines