Description
Ronstan Orbit BB Quad Block w/Swivel Shackle | Boat Supply Store
Engineered for demanding offshore and inshore racing environments, this Ronstan Series 40 Orbit BB Quad Block offers superior performance through its advanced 2-stage ball bearing system, achieving exceptionally low friction. With a robust 1320 lb. Maximum Working Load Limit and toughened glass fiber reinforced nylon cheeks, it provides unparalleled strength and durability for critical control lines on dinghies, catamarans, and sportsboats up to 8m (26ft). This block is an essential component for mainsail controls, spinnaker sheets, and halyards where precise load management and minimal friction are paramount for optimal sail trim and boat speed.
Key Features
- Class-leading dynamic and static load ratings for absolute reliability
- Lightweight, strong toughened glass fiber reinforced nylon cheeks ensure longevity
- Low friction 2-stage ball bearing system minimizes load and enhances sheeting speed
- Secure rope holding via integrated carbon-reinforced C-Cleat™
- Adjustable cleat arms allow for personalized cleating angle
- Versatile attachment with swivel shackle head for various mounting configurations
- High-performance design suitable for competitive sailing applications
- Durable construction engineered to withstand harsh marine conditions
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 1-9/16 inch |
| Rope Diameter Capacity | up to 3/8 inch |
| Pin Diameter | 5/32 inch |
| Maximum Working Load Limit (MWL) | 1320 lb. |
| Breaking Load (B.L.) | 2650 lb. |
| Weight | 6.8 oz. |
| Cheek Material | Toughened glass fiber reinforced nylon |
| Bearing System | 2-stage ball bearing |
Who This Is For
Performance-oriented sailors and boaters with dinghies, off-the-beach catamarans, sportsboats up to 8m (26ft), and sailboats up to 9m (30ft) requiring high-load, low-friction block systems for critical lines. Ideal for mainsails, spinnaker sheets, halyards, vangs, backstays, and control lines.
How It Compares
| Feature | Ronstan Orbit BB Quad Block w/Swivel Shackle | Competitor |
|---|---|---|
| Sheave Diameter | 1-9/16 in. | 1-1/2 in., 40mm |
| Max Rope Diameter | 3/8 in. | 3/8 in., 10mm |
| Working Load Limit (MWL) | 1320 lb. | 1100 lb., 2200 lb. |
| Weight | 6.8 oz. | 4.9 oz., 4.2 oz. |
| Bearing System | 2-stage ball bearing | Carbo-block (composite), Plain bearing |
| Integrated Cleat | Yes (C-Cleat™) | No (Ratchomatic mechanism), No |
Common Concerns Answered
Is the higher price point of this Ronstan block justified for my sailing needs?
The Ronstan Series 40 Orbit BB Quad Block's premium price reflects its class-leading load ratings, exceptionally low friction from the 2-stage ball bearing system, and durable, lightweight construction. For performance-oriented sailors on dinghies, catamarans, or smaller keelboats up to 30ft who demand maximum efficiency and reliability from their control lines, the enhanced performance and longevity provide significant value.
What if I don't need an integrated cleat on my block?
While this model features a C-Cleat™ for secure rope holding, Ronstan offers similar Series 40 Orbit BB blocks without integrated cleats. If your specific rigging setup or preference dictates a cleatless solution, exploring those alternative SKUs will ensure optimal integration into your existing system.
Are the advanced features of this block overkill for casual sailing?
The advanced 2-stage ball bearing system and high load ratings are designed for demanding applications where efficiency and reliability are critical. For less performance-focused sailing, basic blocks may suffice. However, the low friction and strength of this Ronstan block will still provide a noticeable improvement in sheeting ease and control line response, even for moderate use.
Frequently Asked Questions
What is the maximum rope diameter this Ronstan Series 40 Orbit BB Quad Block can accommodate?
The Ronstan Series 40 Orbit BB Quad Block is designed to accommodate rope diameters of up to 3/8 inch.
What is the Working Load Limit (WLL) for the Ronstan Series 40 Orbit BB Quad Block?
The Ronstan Series 40 Orbit BB Quad Block has a Maximum Working Load Limit (MWL) of 1320 lb.
What are the primary applications for the Ronstan Series 40 Orbit BB Quad Block?
Primary applications include mainsails, spinnaker sheets, halyards, vangs, backstays, and control lines on performance dinghies, off-the-beach catamarans, sportsboats up to 8m (26ft), and sailboats up to 9m (30ft).
How does the 2-stage ball bearing system in this block reduce friction?
The 2-stage ball bearing system utilizes two concentric rows of precision-molded ball bearings, distributing the load efficiently and minimizing contact friction between the sheave and the bearing race, resulting in significantly smoother operation and higher load capacity.
What is the weight of the Ronstan Series 40 Orbit BB Quad Block?
The Ronstan Series 40 Orbit BB Quad Block weighs 6.8 oz.
