Harken 60 mm Triple Aluminum Element Block with Swivel – 6272

Maximize mechanical advantage and streamline high-load line handling with the Harken 60 mm Triple Aluminum Element Block with Swivel (6272) — a heavy-duty, versatile sailing block engineered for demanding sheet, halyard, and tackle systems on cruising and performance sailboats. Featuring three precision-machined, 60 mm sheaves housed in a lightweight anodized aluminum body, this triple block delivers superior strength, smooth operation, and excellent corrosion resistance for long-lasting performance at sea.

The swivel head allows the block to rotate and align naturally with changing line angles under load, reducing chafe and optimizing power transfer. Each sheave rides on sealed, low-friction bearings, ensuring smooth line movement even under high tension. Ideal for multi-part purchase systems, traveler cascades, or control line setups requiring added mechanical advantage, the 6272 block provides sailors with the leverage needed to handle tough trimming and adjustment tasks with confidence.

Whether you’re rigging a powerful mainsheet system, a multi-part halyard tackle, or complex control line assemblies, this triple aluminum block with swivel adds efficiency, strength, and reliability to your sailing rig.

Technical Specifications

• Brand: Harken

• Model: Triple Aluminum Element Block

• Part Number: 6272

• Sheave Diameter: 60 mm (2.36 in)

• Number of Sheaves: 3

• Swivel: Yes — full rotation under load

• Material: Anodized aluminum sheaves and body

• Bearings: Sealed low-friction bearings

• Application: Multi-part rigging and purchase systems

Benefits

• Triple sheaves allow for high-mechanical-advantage tackles that reduce effort

• Swivel alignment improves load tracking and reduces line chafe

• Smooth, sealed bearings enhance responsiveness and line life

• Lightweight yet strong — ideal for cruising and racing environments

• Long-lasting corrosion resistance for marine use

Applications

• Multi-part purchase systems for mainsheets and halyards

• Traveler block cascades

• Control line and vang tackle setups

• Heavy-load trimming tasks on cruising and racing sailboats

• Rigging upgrades for performance sailing

Summary for the User

The Harken 6272 is a professional-grade "workhorse" for mid-to-large keelboats. It trades complex ball bearings for a simpler, tougher design that is much easier to maintain. If you are building a powerful mainsheet system or a heavy-duty vang, this block offers a superior balance of strength and value.

Maintenance Tip: Occasionally rinse with fresh water to remove salt and grit. Since it uses composite bearings, you should avoid using oils or greases, as they can trap contaminants and lead to premature wear.

Manufacturer : Harken
Manufacturer Part No : 6272