Ronstan Series 40 Triple Ball Bearing Block, Swivel Head, 40mm Sheave

Master your sail control with the Ronstan Series 40 Triple Ball Bearing Block. Engineered for demanding marine applications, this block ensures exceptionally smooth and efficient operation for critical sailing lines. Featuring a high-performance 2-stage ball bearing system, it delivers consistent, low-friction functionality across the full load range. Crafted with robust, corrosion-resistant materials, it's the professional's choice for reliability and precision on the water. Upgrade your rigging for unparalleled control and performance.

• High-Performance Bearing System: Features low-friction Acetal or Torlon® ball bearings and a 2-stage system, ensuring consistent performance across the full load range for optimal efficiency.
• 360° Swivel Head: The swivel shackle head allows for full 360° rotation, providing maximum flexibility and optimal line alignment while preventing twists and tangles.
• Robust & Lightweight Construction: Built with impact-resistant, fiber-reinforced Nylon cheeks and Grade 316 stainless steel load strap and head fitting for exceptional durability and corrosion resistance in harsh marine environments.
• Optimal Sheave Diameter: A 40mm sheave diameter ensures efficient line management and optimal power transfer, enhancing overall rigging performance.
• High Rope Capacity: Accommodates lines up to 10mm (2/5 inch) in diameter, offering versatility for various rigging setups and applications.
• Impressive Strength: Rated for a Maximum Working Load (MWL) of 600 kg (1323 lbs) and a Breaking Load (BL) of 1400 kg (3087 lbs), guaranteeing reliability under extreme sailing conditions.
• Easy Maintenance: Integrated cheek cut-outs provide convenient access to the bearing system, simplifying upkeep and prolonging the block's lifespan.

• Suitable for mainsail, halyard, vang, and spinnaker control lines.
• Ideal for off-the-beach catamarans, one-design classes, and sportsboats up to 8m (26ft).