Ronstan Series 40 Ball Bearing Orbit Block™, Lashing Snatch Block, RF48109

Ronstan Series 40 Ball Bearing Orbit Block™ – Lashing Snatch Block (RF48109)

High-performance 40mm ball bearing lashing snatch block delivering class-leading strength, low friction, and versatile rigging for dinghies and small boats.

The Ronstan Series 40 Ball Bearing Orbit Block™ Lashing Snatch Block (RF48109) is engineered to deliver the perfect balance of strength, performance, and reliability for modern sailing systems.

Designed for high-performance applications, the Series 40 range offers class-leading dynamic and static load ratings, making it one of the strongest options available in this size category. The toughened glass fibre reinforced nylon cheeks replace traditional stainless steel straps, significantly reducing weight while maintaining exceptional durability and structural integrity.

This lashing snatch block configuration provides maximum versatility, allowing quick and secure attachment in a wide range of rigging setups. Ideal for temporary or adjustable lead systems, it integrates seamlessly into complex control systems including high-purchase mainsheet setups, cascading vangs, and spinnaker sheet systems.

The advanced 2-stage ball bearing system ensures smooth, low-friction operation under varying loads. Ball bearings reduce friction during low loads, while a secondary full-contact bearing maintains consistent performance as loads increase, delivering efficiency across the full working range.

Part of a highly adaptable system, the Series 40 Orbit Blocks™ range supports a wide variety of configurations, from simple single blocks to complex multi-sheave systems capable of achieving up to 12:1 purchase. This makes it an ideal solution for off-the-beach catamarans, dinghies, and sportsboats where performance and flexibility are critical.

Built for reliability and performance, the Series 40 Ball Bearing Orbit Block™ is a trusted choice for sailors seeking lightweight strength and efficient load handling in demanding conditions.

Ideal For

• Dinghy mainsheet and spinnaker systems

• Off-the-beach catamarans

• Sportsboats up to 8m (26ft)

• Halyard, vang, and backstay systems up to 9m (30ft)

• Control line systems on larger yachts

Key Features

• Class-leading dynamic and static load ratings in 40mm category

• Lashing snatch block design for versatile rigging applications

• 2-stage ball bearing system for low friction across all load ranges

• Lightweight glass fibre reinforced nylon cheeks for strength and reduced weight

• Suitable for complex purchase systems up to 12:1

• Designed for high-performance sailing applications

• Smooth operation under both low and high loads

• Durable construction for long-term reliability

Technical Specifications

Model: RF48109
Sheave Size: 40 mm
Type: Lashing snatch block
Bearing System: 2-stage ball bearing

Materials:

• Sheave & Ball Bearings: High compression strength acetal

• Frame/Cheeks: Glass fibre reinforced nylon

Applications:

• Boats up to 8m (26ft) for mainsheet and spinnaker systems

• Boats up to 9m (30ft) for halyard, vang, and backstay systems