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.
57 mm
Use 57 mm Black Magic® AirBlocks® on offshore
boats. These strong, lightweight blocks are sculpted
aluminum, with Torlon® rollers and carbon-black
balls for strength and UV protection. Rollers are
housed in a unique center cage and are isolated for
less friction. Blocks feature a three-way head system
and come in high- and low-load configurations.
The 3195 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
