Description
Barton 30mm Plain Bearing Pulley | Boat Supply Store
For efficient control of sail or control lines on smaller vessels, this Barton Size 1 30mm pulley block offers a robust solution. It features a 30mm sheave diameter and a plain bearing, rated for a 355kg (782lbs) Safe Working Load, capable of handling up to 8mm (5/16") diameter rope. The integrated swivel head and becket provide versatile rigging options for mainsail outhauls, halyards, or control lines on dinghies and small keelboats.
Key Features
- Compact 30mm sheave diameter
- Smooth Plain bearing for efficient operation
- Versatile Swivel head for adaptable rigging angles
- Secure Integrated becket for reliable attachment
- Durable Internal steel frame construction
- High Capacity Supports up to 8mm (5/16") rope
- Strong 355kg (782lbs) Safe Working Load
- Cost-Effective Excellent value for plain bearing blocks
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm |
| Bearing Type | Plain Bearing |
| Swivel Head | Yes |
| Becket | Yes |
| Internal Steel Frame | Yes |
| Max Rope Diameter | 8mm (5/16") |
| SWL (Safe Working Load) | 355kg (782lbs) |
| Break Load | 710kg (1565lbs) |
| Weight | 51g |
| Dimensions | 85x32x25mm |
Who This Is For
Sailors and boaters requiring a reliable, compact, and strong single pulley block with a swivel and becket for various rigging applications on small to medium-sized craft. It's particularly well-suited for dinghies, trailer sailers, or auxiliary lines on larger vessels.
How It Compares
| Feature | Barton 30mm Plain Bearing Pulley | Competitor |
|---|---|---|
| Sheave Diameter | 30mm | — |
| Bearing Type | Plain Bearing | Ball Bearing, Plain Bearing |
| Max Rope Diameter | 8mm (5/16") | — |
| SWL (Safe Working Load) | 355kg (782lbs) | Not specified, Approx. 150-200kg |
| Block Type | Swivel + Becket | Swivel, Swivel + Becket |
Common Concerns Answered
Will the plain bearing be less efficient than a ball bearing system?
For high-load, high-speed, or prolonged use applications, ball bearings offer superior efficiency. However, for the intended use on small to medium craft with moderate loads, this Barton block's plain bearing provides a robust and cost-effective solution, with an internal steel frame enhancing its durability.
Is this block too small for my needs?
The 30mm sheave diameter and 8mm (5/16") max rope capacity are optimized for a range of applications on smaller to medium-sized vessels. If your rigging requires significantly larger rope diameters or higher loads, a larger block with a ball bearing system would be more appropriate.
Can I use this for dynamic loads?
While rated for a significant Safe Working Load (SWL) of 355kg (782lbs), this plain bearing block is best suited for static or moderate dynamic loads encountered in typical sailing maneuvers on smaller craft, rather than extreme shock loading situations.
Frequently Asked Questions
What is the maximum rope diameter this Barton pulley block can accommodate?
This Barton Size 1 30mm Plain Bearing Pulley Block is designed to accommodate a maximum rope diameter of 8mm (5/16").
What is the working load limit (SWL) for the Barton Size 1 30mm pulley block?
The Safe Working Load (SWL) for the Barton Size 1 30mm pulley block is 355kg (782lbs).
Is this pulley block suitable for marine use?
Yes, this Barton pulley block is specifically designed and manufactured for marine environments, featuring an internal steel frame for strength and durability.
What is the difference between plain bearing and ball bearing blocks?
Plain bearing blocks use a simple sleeve for the sheave to rotate on, offering durability and cost-effectiveness. Ball bearing blocks use a system of bearings to reduce friction, providing higher efficiency and smoother operation, especially under heavy loads or high speeds.
Can this block be used for dynamic loads?
This block can handle moderate dynamic loads within its 355kg (782lbs) SWL. For extreme shock loads, consider a block designed for such applications.
