Description
Barton 30mm Double Pulley Block w/ Swivel & Becket | Boat Supply Store
For fractional rigging systems or sheeting on smaller keelboats, this Barton Size 1 30mm double pulley block with integrated swivel and becket provides a robust attachment point for complex line management. Its internal steel frame ensures structural integrity under load, while the plain bearing design offers a balance of durability and cost-effectiveness for routine sail handling. This block is rated for a maximum rope diameter of 8mm (5/16 inch) and boasts a substantial working load limit (SWL) of 355kg, making it suitable for adjusting mainsail or jib sheets on vessels up to approximately 30 feet.
Key Features
- Durable Construction: Internal steel frame enhances strength and longevity.
- Versatile Rigging: Double sheave configuration allows for purchase systems or multiple line leads.
- Swivel & Becket: Facilitates easy attachment and offers a secure point for lashing or shackle connection.
- Smooth Operation: Plain bearing design for reliable performance in marine environments.
- Compact Size: 30mm sheave diameter is suitable for a variety of running rigging applications.
- High Load Capacity: Rated for up to 8mm (5/16 inch) rope with a 355kg SWL.
- Reliable Brand: Barton Marine is a trusted name in sailboat hardware.
- Cost-Effective: Offers strong functionality for its price point.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm |
| Bearing Type | Plain bearing |
| Number of Sheaves | Double |
| Max Rope Diameter | 8mm (5/16 inch) |
| Working Load Limit (SWL) | 355kg (782 lbs) |
| Break Load | 710kg (1565 lbs) |
| Frame Material | Internal Steel Frame |
| Attachment Type | Swivel & Becket |
Who This Is For
Sailors and boaters needing a dependable pulley block for various rigging tasks on small to medium-sized boats, particularly when adjustable load points or multiple line attachments are required. This block is ideal for those seeking a robust and adaptable solution for their running rigging.
How It Compares
| Feature | Barton 30mm Double Pulley Block w/ Swivel & Becket | Competitor |
|---|---|---|
| Sheave Diameter | 30mm | — |
| Bearing Type | Plain bearing | Carbo-Talic ball bearing, Plain bearing |
| Number of Sheaves | Double | Single, Single |
| Max Rope Diameter | 8mm (5/16) | — |
| SWL (Safe Working Load) | 355kg (782lbs) | — |
| Includes Becket | Yes | No (typically sold separately or as a different model), Yes |
Common Concerns Answered
Why does this pulley block have plain bearings instead of ball bearings?
Plain bearing blocks, like this Barton model, offer robust durability and a lower cost of entry. While they may exhibit higher friction than ball bearing blocks under heavy load or high speed, they excel in simplicity and resistance to contamination in harsh marine environments, making them a reliable choice for many standard rigging applications.
Can the sheave be difficult to load with certain rope sizes?
To ensure optimal performance, it's crucial to properly seat the rope within the sheave groove. If a rope size feels tight, verify that it is not exceeding the maximum 8mm (5/16 inch) diameter and that the rope is centrally aligned within the sheave for smooth rotation.
Is this block less efficient than ball bearing options?
Plain bearing blocks generally have higher friction than ball bearing blocks, particularly when subjected to significant loads or rapid movement. For applications demanding the absolute lowest friction, such as high-performance racing sheets, a ball bearing block might be preferred. However, for general cruising and many utility functions, the performance of this plain bearing block is more than adequate.
Frequently Asked Questions
What is the maximum rope diameter this Barton pulley block can accommodate?
The Barton Size 1 30mm Plain Bearing Pulley Block is designed to accommodate a maximum rope diameter of 8mm (5/16 inch).
What is the working load limit (SWL) for the Barton Size 1 30mm pulley block?
The working load limit (SWL) for this Barton pulley block is 355kg (782 lbs).
Is this Barton pulley block suitable for marine use?
Yes, this Barton pulley block is specifically designed for marine use, featuring robust construction and materials suitable for saltwater environments.
What is the difference between plain bearing and ball bearing blocks?
Plain bearing blocks utilize a smooth sleeve for rotation, offering simplicity and durability. Ball bearing blocks use rolling elements (balls) between the sheave and the block body, significantly reducing friction for higher efficiency, especially under heavy loads or high speeds.
Can this pulley block be used with a swivel and becket attachment?
Yes, this Barton Size 1 30mm pulley block features an integrated swivel and becket, allowing for versatile attachment to your rigging system.
