Harken 60 mm Double Aluminum Element Block with Swivel & Becket – 6270

Upgrade your sailboat’s rigging with the Harken 60 mm Double Aluminum Element Block with Swivel and Becket (6270) — a versatile, high-performance sailing block engineered for smooth, reliable handling of sheets, halyards, and control lines. Designed with two precision-machined 60 mm aluminum sheaves, this block combines lightweight strength with exceptional durability, making it a solid choice for cruising, club racing, and performance sailboats alike.

The integrated swivel head allows the block to rotate under load, aligning naturally with line direction changes and reducing chafe and friction. The addition of a becket (a fixed attachment point) expands the rigging options available — enabling simple purchase systems and easier anchoring of line tails or tackle leads without extra hardware.

Sealed, low-friction bearings ensure that line runs smoothly under load, while the anodized aluminum construction offers excellent corrosion resistance in harsh marine environments. Whether used in mainsheet cascades, control line leads, or traveler systems, this double block with swivel and becket brings versatility, ease of use, and lasting performance to your deck hardware.

Technical Specifications

• Brand: Harken

• Model: Double Aluminum Element Block

• Part Number: 6270

• Sheave Diameter: 60 mm (approx. 2.36 in)

• Number of Sheaves: 2

• Swivel: Yes — allows block rotation under load

• Becket: Yes — fixed attachment point

• Material: Anodized aluminum body and sheaves

• Bearings: Sealed low-friction bearings

• Application: Sheet, halyard, traveler, and control line tasks

Benefits

• Swivel rotation aligns with line direction for reduced wear and better efficiency

• Becket adds rigging flexibility for purchase tackles and line tie-offs

• Smooth bearing action enhances trimming precision

• Lightweight and strong — ideal for performance sailing

• Corrosion-resistant finish stands up to saltwater exposure

Applications

• Main and headsail sheet cascades

• Traveler car lead blocks

• Control line and halyard redirect systems

• Simple 2:1 tackle setups using the becket

• Cruising and racing sailboat rigging upgrades

Summary for the User

The Harken 6270 is a professional-grade "workhorse" for mid-sized keelboats. It is particularly well-suited for mainsheet systems where the block remains under high tension for long periods. Because it uses composite bearings, it requires very little maintenance beyond an occasional fresh-water rinse.

Installation Tip: To maintain performance, avoid using greases or oils on the bearings, as these can trap salt and grit. A simple rinse with fresh water after use is the best way to ensure the sheaves spin freely for years.

Manufacturer : Harken
Manufacturer Part No : 6270