The Ronstan Series 40 Orbit BB Double Block with Swivel & Shackle is a high-performance sailing hardware designed to provide exceptional strength, reliability, and performance. This superior ball-bearing block series boasts class-leading dynamic and static load ratings, making it an ideal choice for a wide range of sailing applications. With its lightweight and strong toughened glass fiber reinforced nylon cheeks, this block replaces traditional stainless steel straps used in utility blocks, offering the perfect balance of performance and reliability. The Series 40 Orbit Blocks feature Ronstan's renowned carbon-reinforced C-Cleat for secure rope holding with low entry and exit efforts, and fairleads for fast action from any angle.

The cleat arms are made from stainless steel and are adjustable for setting your preferred cleating angle. The ball-bearing system incorporates a 2-stage bearing system that minimizes friction and maintains low friction across the full working load range. For high-load applications, the High Load version is designed to withstand heavy dynamic or static loads, featuring a high-strength grade 2205 stainless steel sheave and hub, together with a triple bearing race to maintain low friction at very high loads.

The versatility of the Series 40 Orbit Blocks is unmatched, offering a multitude of possible systems right up to a 12:1 purchase mainsheet system for off-the-beach performance catamarans. The range includes single and double sheave lashing or soft attachment options, as well as multiple sheave blocks with quad and quin sheaves. This makes them an excellent choice for a wide range of sailing applications, from mainsheet systems and spinnaker sheets on dinghies, off-the-beach catamarans, and sportsboats up to 8m (26ft), to halyard, vang, and backstay applications on boats up to 9m (30ft), and control line applications on larger yachts.

With a sheave diameter of 1-9/16 inches and a maximum rope diameter of 3/8 inches, this block is designed to handle a range of rope sizes. The pin diameter is 5/32 inches, and the block has a maximum working load of 1320 pounds and a breaking load of 2650 pounds. The block itself weighs just 4.2 ounces, making it an ideal choice for sailors looking to minimize weight while maintaining exceptional performance.

Ronstan's commitment to quality and performance is evident in the design and construction of the Series 40 Orbit Blocks. The use of high-strength materials, precision engineering, and rigorous testing ensures that these blocks deliver exceptional performance and reliability, even in the most demanding sailing conditions.

Whether you're a competitive sailor or a casual cruiser, the Ronstan Series 40 Orbit BB Double Block with Swivel & Shackle is an excellent choice for any sailing application. Its exceptional strength, reliability, and performance make it an ideal choice for a wide range of sailors, from beginners to experienced sailors. With its versatility, reliability, and exceptional performance, this block is sure to become an essential component of your sailing setup.