Ronstan RF46100 40mm Auto Ratchet Block – Swivel Head Sailing Pulley

The Ronstan RF46100 Auto Ratchet Block with a 40mm sheave and swivel head delivers automatic power control for high-performance dinghy and keelboat sailing. This advanced block features automatic ratchet engagement that activates under load, providing excellent holding power and responsive control without manual switching.

Built with ball bearing technology for smooth free-running in light conditions and directional ratchet grip under load, it’s perfect for mainsheet and spinnaker sheet systems. The 316 stainless steel head and reinforced composite cheeks offer durability and corrosion resistance in the toughest marine environments.

Specifications:

• Sheave Diameter: 40mm

• Max Rope Diameter: 10mm

• Features: Auto ratchet engagement, ball bearings, swivel head

• Materials: Acetal sheave, reinforced nylon cheeks, stainless fittings

• Applications: Mainsheet systems, spinnaker sheets, jib control lines

• Function: Ratchet auto-locks under load for superior control and grip

A favourite among performance sailors for its automatic handling and dependable grip. Available now from Barton Marine NZ, your trusted supplier of Ronstan ratchet blocks and sailing hardware.