Description
Harken 57mm Carbo Ratchet Block w/Swivel & Becket | Boat Supply Store
This Harken 57mm Carbo Single Ratchet Block is engineered to provide positive holding on loaded control lines while permitting controlled easing. Its lightweight Carbo construction ensures durability and reduced friction, essential for managing mainsail or jib sheets. With a 57mm sheave diameter and a maximum line diameter of 10mm (3/8 inch), it efficiently handles loads up to 227 kg (500 lb), making it a reliable component for dinghy racers on Galveston Bay or cruising sailors navigating coastal waters.
Key Features
- Secure holding power with integrated single ratchet mechanism
- Low friction 57mm Carbo sheave for smooth line movement
- Versatile line angles with a fully swiveling head
- Attachment point capability via the integrated becket
- Lightweight yet robust Carbo composite construction
- Confidence in load management during critical maneuvers
- Controlled easing of loaded lines
- Durable for demanding marine environments
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter (mm) | 57 |
| Sheave Diameter (inch) | 2-1/4 |
| Maximum Line Diameter (mm) | 10 |
| Maximum Line Diameter (inch) | 3/8 |
| Maximum Working Load (kg) | 227 |
| Maximum Working Load (lb) | 500 |
| Ratchet Mechanism | Single |
| Head Type | Swivel |
| Becket | Yes |
| Construction Material | Carbo |
Who This Is For
Cruising sailors and dinghy racers requiring a dependable block for precise control of loaded lines. Ideal for situations where hand-holding is necessary and secure line retention is paramount.
How It Compares
| Feature | Harken 57mm Carbo Ratchet Block w/Swivel & Becket | Competitor |
|---|---|---|
| Sheave Diameter (mm) | 57 | 40 |
| Max Line Diameter (mm) | 10 | 8 |
| Max Working Load (kg) | 227 | 227 |
| Ratchet Mechanism | Single | Single |
| Swivel | Yes | Yes |
| Becket | Yes | Yes |
Common Concerns Answered
Is the working load limit sufficient for large offshore vessels?
The Harken 57mm Carbo Single Ratchet Block has a maximum working load of 227 kg (500 lb), which is suitable for smaller to mid-sized boats, dinghies, and auxiliary control lines. For very large vessels or extremely heavy loads, a block with a higher working load limit may be necessary.
Is the ratchet mechanism difficult to engage or disengage?
While some users note the ratchet mechanism can be stiff initially, this is characteristic of new components designed for secure engagement. The stiffness typically lessens with use, and the mechanism is engineered for reliable holding power once engaged.
What if I need to secure a line that is heavier than the maximum working load?
This Harken block is rated for a maximum line diameter of 10mm (3/8 inch) and a working load of 227 kg (500 lb). Exceeding these limits can compromise the block's integrity and your safety. For heavier loads, consider Harken's larger diameter blocks or those with higher load ratings.
Frequently Asked Questions
What is the maximum line diameter this Harken ratchet block can handle?
This Harken 57mm Carbo Single Ratchet Block is designed to accommodate a maximum line diameter of 10mm (3/8 inch).
What is the working load limit for the Harken 57mm Carbo Single Ratchet Block?
The maximum working load limit for this block is 227 kg (500 lb).
How does the ratchet mechanism on this block work?
The single ratchet mechanism engages with the line when under load, preventing it from slipping backward. It can be disengaged to allow controlled easing of the line.
Can this block be used for both port and starboard tack?
Yes, the swivel head allows for versatile positioning and can be used effectively for lines running on either port or starboard tack.
What is the sheave diameter of the Harken 57mm Carbo Single Ratchet Block?
The sheave diameter of this Harken block is 57mm (2-1/4 inches).
