Description
Harken 57mm Carbo Block Flip Flop w/Cam | Boat Supply Store
Address demanding sheeting angles and the need for secure line management with the Harken 57mm Carbo Block Flip Flop. This block offers exceptional strength-to-weight ratio due to its Carbo construction, supporting a 136 kg (300 lb) working load. Its integrated cam provides reliable line holding, crucial for precise trim on smaller keelboats or dinghies operating in conditions like those found on Galveston Bay.
Key Features
- Lightweight Carbo block construction for superior strength-to-weight ratio.
- Pivoting flip-flop design allows for close-to-deck sheeting configurations.
- Hinged construction facilitates a wide range of adjustable lead angles.
- Integrated cam ensures secure and reliable line holding for precise adjustments.
- 57mm sheave diameter is optimized for efficient line handling.
- Max line diameter of 10mm (3/8 inch) accommodates a variety of control lines.
- Durable construction engineered for rigorous marine environments.
- Compact size minimizes deck clutter and weight aloft.
Specifications
| Product Specifications | |
|---|---|
| 57mm sheave diameter | 57mm |
| 2 1/4 inch sheave diameter | 2 1/4 inch |
| 10mm maximum line diameter | 10mm |
| 3/8 inch maximum line diameter | 3/8 inch |
| 136 kg maximum working load | 136 kg |
| 300 lb maximum working load | 300 lb |
Who This Is For
Owners of small to medium sailboats and competitive racers seeking a lightweight, high-performance block that integrates line control. Ideal for those requiring versatile lead angles and efficient sheet management for optimized sail trim.
How It Compares
| Feature | Harken 57mm Carbo Block Flip Flop w/Cam | Competitor |
|---|---|---|
| Sheave Diameter (mm) | 57 | 50, 50 |
| Max Line Diameter (mm) | 10 | 10, 10 |
| Max Working Load (kg) | 136 | 1000, 1000 |
| Flip-Flop Design | Yes | No, No |
| Integrated Cam | Yes | No, No |
Common Concerns Answered
Is the working load limit sufficient for larger yachts?
The 136 kg (300 lb) working load limit is optimized for small to medium sailboats. For larger vessels or applications demanding significantly higher loads, consider Harken's larger block series or blocks with higher load ratings.
Can the cam be difficult to engage or disengage?
Some users find the cam mechanism initially stiff. This is typical for integrated cam cleats designed for secure holding, and it generally loosens with use. Ensure proper line routing and tension for optimal cam function.
Will this block be too small for my mainsheet?
The 57mm sheave diameter and 10mm (3/8 inch) maximum line capacity are designed for smaller control lines. For mainsheets on larger boats, a larger diameter block with a higher working load capacity would be more appropriate.
Frequently Asked Questions
What is the maximum line diameter this block can handle?
This Harken block is designed to accommodate a maximum line diameter of 10mm, which is equivalent to 3/8 inch.
What is the working load limit of the Harken 57mm Carbo Block Flip Flop w/Cam?
The maximum working load limit for this block is 136 kg (300 lb).
What is the purpose of the 'flip-flop' design?
The 'flip-flop' design allows the block to pivot around the line axis, enabling it to lay flat close to the deck or bulkhead. This is advantageous for reducing chafe and optimizing lead angles in tight spaces.
Can this block be used for mainsheets or halyards?
This 57mm block is best suited for smaller control lines such as jib sheets, spinnaker sheets, vang systems, or control lines on dinghies and small keelboats. Its working load limit may be insufficient for mainsheets or halyards on larger vessels.
What are the advantages of a carbo block?
Carbo blocks, like this Harken model, are constructed from a high-strength, UV-resistant composite material. This results in a significantly lighter weight compared to traditional metal blocks while maintaining excellent load-bearing capabilities and corrosion resistance.
