Harken Zircon 40 mm Block

The Harken Zircon 40 mm block is designed for reliable and efficient rope handling in a wide range of onboard applications. Featuring a composite bearing system, this block delivers consistent performance under load with controlled friction, making it ideal for cruising and general-purpose use.

The 40 mm sheave ensures smooth rope movement while minimizing wear, even during frequent adjustments. Its compact size makes it suitable for installations where space is limited, without compromising strength or durability.

Built to withstand marine environments, this block offers long service life and dependable performance. Available in single and double sheave configurations for flexible use in both simple and more advanced rigging systems.

Key features

• Composite bearing for reliable performance under load
• 40 mm sheave for smooth rope handling
• Compact and durable construction
• Controlled friction for stable operation
• Available in multiple configurations

Applications

• Control and trimming lines
• Running rigging on small to medium boats
• Purchase systems with moderate loads

Specifications

• Sheave diameter: 40 mm
• Number of sheaves:
  • 1 sheave
  • 2 sheaves