Ronstan Series 20 Triple Ball Bearing Block with Shackle, 20mm, 400kg MWL

Experience superior sailing performance with the Ronstan Series 20 Triple Ball Bearing Block. Engineered for efficiency and durability in demanding marine environments, this lightweight block features precision-molded Acetal sheaves and robust stainless steel ball bearings, ensuring exceptionally low friction and high load capacity. Its versatile two-way head can be fixed at 0° or 90° for optimal rigging flexibility. Upgrade your control systems today for smoother, more reliable operation.

Key Benefits & Specifications:

• Low-Friction Operation: Precision-molded Acetal sheaves running on stainless steel ball bearings provide high performance and minimize friction for effortless control.
• High Load Capacity: Offers a Maximum Working Load (MWL) of 400kg (880lbs) and a Breaking Load (B.L.) of 850kg (1870lbs), ensuring reliability under extreme conditions.
• Durable Construction: Features a Grade 316 stainless steel load strap and head fitting, paired with impact and UV-resistant, fiber-reinforced Nylon cheeks for long-lasting use in harsh marine conditions.
• Versatile Rigging: The two-way head can be fixed at 0° or 90°, allowing for flexible orientation to suit various rigging configurations.
• Compact Sheave Diameter: 20mm (3/4") sheave diameter accommodates a maximum rope diameter of 6mm (1/4"), suitable for a wide range of control lines.
• Lightweight Design: Weighs only 62g (2.2oz) to reduce overall rigging weight without compromising strength.
• Optimized Pin Diameter: A pin diameter of 4mm (5/32") ensures secure attachment points.

Recommended Applications:

This triple ball bearing block is ideal for creating powerful purchase systems and is well-suited for a variety of dinghy and small keelboat applications, including control lines, vangs, cunninghams, and traveller controls.