75mm Black Magic AirBlock - Single with Swivel

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 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.

Features:

• The center cage keeps Torlon roller bearings separated and parallel to reduce friction
• Dirt and salt fall between rollers
• Captive Delrin balls carry sideloads
• 6061-T6 aluminum sideplates CNC sculpted to remove excess weight
• Thin-profile, deep-groove aluminum sheaves have radiused edges to protect high-tech line
• 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

75mm Black Magic Airblocks feature Torlon roller bearings for strength and reduced wear. The unique center cage separates rollers for less friction. Sideload ball bearings are protected by sculpted aluminum sideplates. Dissimilar metal are isolated to minimize corrosion. Low-load blocks use Delrin rollers and type 316 stainless steel shackles.

Use for:

• Sheets
• Halyards
• Running backstay
• Control lines

Specifications: