Ronstan Series 40 Orbit Single BB Single Stand-Up Block

The Series 40 Orbit Single BB Single Stand-Up Block is engineered for marine enthusiasts seeking unparalleled strength, performance, and durability. Designed to handle the demanding conditions of boating, this block ensures smooth and reliable operation for various sailing applications.

Exceptional Performance and Durability

The Series 40 Orbit Blocks™ set the standard with their class-leading dynamic and static load ratings, the highest available in their size category. Constructed with lightweight yet robust toughened glass fiber reinforced nylon cheeks, they eliminate the need for traditional stainless steel straps, offering a perfect blend of performance and reliability.

Versatile Configuration Options

Whether you need traditional single swivel blocks or more complex systems, the Series 40 Orbit Blocks™ range has you covered. Options include single and double sheave lashing or soft attachments, as well as multiple sheave blocks with quad and quin sheaves. This versatility allows for a multitude of setup possibilities, including up to a 12:1 purchase mainsheet system ideal for off-the-beach performance catamarans.

Innovative Cleating and Bearing Systems

Each Series 40 Orbit Block™ is equipped with our carbon-reinforced C-Cleat™ for secure rope holding, minimizing effort during entry and exit. The stainless steel cleat arms are adjustable, allowing you to set the cleating angle to your preference. The ball bearing versions feature a two-stage bearing system that reduces friction, ensuring efficient and effortless trimming under any load.

High Load Capabilities

For applications requiring exceptional load handling, the High Load versions of the Series 40 Orbit Blocks™ are specifically designed to meet high dynamic and static load demands. These blocks incorporate high-strength grade 2205 stainless steel sheaves and hubs, along with a triple bearing race system that maintains low friction even under very high loads.

Key Features

• Top-Tier Load Ratings: Class-leading dynamic and static load capacities ensure reliable performance.
• Lightweight Construction: Toughened, glass fiber reinforced nylon cheeks replace heavy stainless steel straps.
• Efficient Bearing System: Low friction two-stage ball bearings for smooth and effortless operation.
• Flexible Attachment Options: Choose from soft attachment, lashing, or traditional swivel shackle heads.
• Compact Design: Low profile ensures easy installation and space-saving on deck.
• Premium Cleating: Carbon-reinforced C-Cleat™ with adjustable stainless steel arms for secure rope management.

Ideal Applications

• Mainsheet Systems: Perfect for dinghies, off-the-beach catamarans, and sportsboats up to 8m (26ft).
• Halyard, Vang, and Backstay: Suitable for boats up to 9m (30ft).
• Control Lines: Essential for larger yacht maneuvering and control.

Technical Specifications

Specification	Details
Sheave Diameter	1-9/16 in.
Maximum Rope Diameter	3/8 in.
Maximum Working Load (M.W.L.)	880 lb.
Breaking Load (B.L.)	1760 lb.
Weight	2.5 oz.

Upgrade your sailing setup with the Series 40 Orbit Single BB Single Stand-Up Block, ensuring optimal performance and reliability on every voyage.

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.