Ronstan Series 40 Orbit BB Quin Block with Becket & Swivel Shackle

Series 40 Orbit BB Quin Block with Becket Swivel Shackle

The Series 40 ball-bearing Orbit Blocks provides the perfect balance of strength, performance, and reliability. They offer class-leading dynamic and static load ratings, the highest available in this size of performance blocks. Lightweight and strong toughened glass fiber reinforced nylon cheeks replace stainless steel straps used in traditional utility blocks - the perfect balance of performance and reliability.

As well as traditional single swivel blocks, the range includes single and double sheave lashing or soft attachment options through to multiple sheave blocks including those with quad and quin sheaves. The range is highly versatile allowing a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans.

Series 40 Orbit Blocks are fitted with our carbon-reinforced C-Cleat for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle. Cleat arms are made from stainless steel and adjustable for setting your preferred cleating angle.

Ball Bearing versions incorporate our 2-stage bearing system using ball bearings to minimize friction and a secondary full-contact bearing to maintain low friction across the full working load range.

High Load versions are designed specifically for any application where high dynamic or static loads are expected. They feature a high-strength grade 2205 stainless steel sheave hub together with a triple bearing race to maintain low friction at very high loads.

Features:

• Class-leading dynamic and static load ratings
• Lightweight, yet strong. Toughened, glass fiber reinforced nylon replaces stainless steel straps used in our traditional utility blocks
• Low friction 2-stage ball bearing system for efficient and effortless trimming
• Soft attachment, lashing and traditional swivel shackle head options
• Low profile and compact
• High performance cleating

Applications

• Mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans and sportsboats to 8m (26ft)
• Halyard, vang and backstay applications on boats to 9m (30ft)
• Control line applications on larger yachts

Specifications:

• Sheave : 1-9/16 in.
• Max. Rope : 3/8 in.
• Pin : 5/32"
• M.W.L.: 1320 lb.
• B. L.: 2650 lb.
• Weight: 8.7 oz.

The Ronstan Series 40 Orbit BB Quin Block with Becket & Swivel Shackle is engineered for sailors seeking reliable performance in a compact, lightweight design. Built with toughened, glass fiber reinforced nylon cheeks, this block offers an optimal balance of strength and weight, replacing traditional stainless steel straps for enhanced durability and ease of handling. Its class-leading dynamic and static load ratings make it ideal for a variety of sailing applications, from small dinghies to larger sportboats.

The ball-bearing system features a 2-stage design that minimizes friction during trimming, ensuring smooth operation under load. The secondary full-contact bearing maintains low friction across the entire working load range, providing consistent performance whether you are adjusting your mainsheet, spinnaker halyards, or control lines. Designed with versatility in mind, the Series 40 range includes options for lashing, soft attachments, and traditional swivel shackles, accommodating a wide variety of sailing systems.

High load versions are equipped with a 2205 stainless steel sheave hub and a triple bearing race, making them suitable for demanding static and dynamic loads, such as halyards, vang, or backstay applications on boats up to 30 feet. The cleat system, featuring a carbon-reinforced C-Cleat, provides secure rope holding with low effort, and the stainless steel cleat arms are adjustable to optimize your cleating angle. The low-profile, compact design ensures minimal windage and easy handling in tight spaces, while the high-performance cleating system offers quick, secure, and reliable control of your lines.

Perfectly suited for mainsheets, spinnaker sheets, and control lines on off-the-beach catamarans, dinghies, and larger yachts, the Ronstan Series 40 Orbit BB Quin Block offers exceptional versatility and performance for sailors who demand reliable hardware. Whether you are rigging a new system or upgrading existing equipment, this block delivers smooth operation, high load capacity, and long-lasting durability to meet the rigors of competitive and recreational sailing alike.

Features:

• Class-leading dynamic and static load ratings

• Lightweight and strong with toughened glass fiber reinforced nylon cheeks

• Low friction 2-stage ball bearing system for effortless trimming

• Includes soft attachment, lashing, and traditional swivel shackle head options

• Compact, low profile design for ease of handling

• High-performance cleating with adjustable stainless steel arms