Ronstan RF48140 Orbit 40mm Single Stand-Up Pulley – Lightweight Deck Block

The Ronstan RF48140 Orbit 40mm Single Stand-Up Block is a lightweight, high-strength pulley designed for deck-mounted control lines on performance dinghies, sportsboats, and small keelboats. Part of Ronstan’s Orbit Series, it features a glass fibre-reinforced polymer body, acetal ball bearings, and a stainless steel stand-up spring for optimal line handling and alignment under load.

Its stand-up design keeps the block upright and accessible on deck, reducing friction and line chafe. Ideal for use in mainsheet systems, traveler controls, and halyard leads where clean deck layouts and responsive line handling are essential.

Specifications:

• Sheave Diameter: 40mm

• Maximum Rope Diameter: 9mm

• Bearings: Acetal ball bearings for smooth, low-friction operation

• Materials: Fibre-reinforced polymer cheeks, acetal sheave, stainless stand-up spring

• Mounting Type: Stand-up base with spring and integrated fastener points

• Applications: Deck-mounted blocks, mainsheets, halyards, traveller lines

• Features: Lightweight, compact, corrosion-resistant, Orbit performance design

Available now at Barton Marine NZ, your official supplier of Ronstan Orbit blocks and high-performance sailing hardware.

• M.W.L. 400 kg
• B. L. 800 kg
• Weight 70 g