3:1 friction block Karver

Installing a furling system (such as a Code 0 or Gennaker) often requires significant force to achieve proper tension. The Karver 3:1 friction block is the essential accessory to simplify your maneuvers. It is perfectly suited for both small sailboats and catamarans up to 90 feet.

Thanks to its 3:1 purchase system, this product reduces the force needed to tension the sail by three. This represents a major comfort gain, especially for sails with a mast hook where all tension adjustments are made from the bottom.

This product comes in 5 versions (from KF1.5 to KF8.0) to match your boat. The KF1.5 model is ideal for sailboats from 10 to 40 feet, while the KF8.0 version offers a breaking load of 16.00T, making it suitable for larger vessels.

Made from molded stainless steel, this friction block ensures excellent durability and total corrosion resistance. It is more compact and more affordable than a traditional pulley, while allowing you to bring the sail setup closer to you. This means you can avoid going forward on deck in rough conditions.

Finally, its versatility allows it to be used as a 3:1 or 2:1 system depending on your needs. To complete your setup, explore our spare parts for your deck hardware.

Technical specifications of the Karver 3:1 friction block:

• Variants: KF1.5, KF3.0, KF4.5, KF6.0, KF8.0
• Material: molded stainless steel (high-strength stainless steel)
• Compatibility: Karver furling systems and other brands
• Installation: mounting under the drum or on the swivel