Ronstan RF48210 Orbit 40mm Double Pulley – Swivel Top Block with Becket

The Ronstan RF48210 Orbit 40mm Double Pulley Block with swivel top and becket is designed for high-performance sail control on dinghies, sportsboats, and small keelboats. As part of Ronstan’s lightweight Orbit Series, it features glass fibre-reinforced composite cheeks, acetal sheaves, and ball bearing technology for smooth, efficient line handling under load.

The double sheave design allows for parallel line control, while the swivel top ensures proper alignment under dynamic loads. The integrated becket enables easy line termination for vang, mainsheet, or control systems. Built for speed, durability, and responsive handling, the RF48210 is a preferred choice for competitive and recreational sailors alike.

Specifications:

• Sheave Diameter: 40mm

• Max Rope Diameter: 9mm

• Bearings: Acetal ball bearings

• Materials: Fibre-reinforced polymer cheeks, acetal sheaves, stainless hardware

• Configuration: Double pulley with becket and swivel head

• Applications: Mainsheet systems, vangs, halyards, control lines

• Features: Lightweight, low-friction, corrosion-resistant, high strength-to-weight ratio

Trusted worldwide for performance and reliability. Available now at Barton Marine NZ, your official supplier of Ronstan Orbit sailing hardware and rigging gear.

• M.W.L. 600 kg
• B. L. 1200 kg
• Weight 130 g