Description
Harken 40mm Twing Block | Boat Supply Store
Efficiently manage spinnaker sheets and code zero up-downs with the Harken 40mm Twing Block, designed for demanding sail control on smaller vessels. This block integrates Carbo Air® construction, achieving a high strength-to-weight ratio with a 40mm sheave diameter and an impressive 606 lb maximum working load. Its innovative opening side plate and spring-biased mechanism enable one-handed rigging and adjustments, crucial for precise sail trim in dynamic sailing conditions common in Galveston Bay.
Key Features
- Effortless one-handed operation via spring-biased opening side plate.
- Superior strength and minimal weight achieved with Carbo Air® construction.
- Facilitates rapid rigging and de-rigging with the articulated opening side plate.
- Handles substantial loads with a 606 lb working limit for secure trim.
- Optimized for precise 1:1 or 2:1 up-down control with a roller at the pivot base.
- Accommodates lines up to 12mm (3/8 in) for versatile application.
- Engineered for durability and consistent performance in marine environments.
- Lightweight design minimizes deck clutter and system inertia.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 40mm (1-9/16 in) |
| Length | 89mm (3-1/2 in) |
| Weight | 86g (3 oz) |
| Maximum Line Diameter | 12mm (3/8 in) |
| Maximum Working Load | 275kg (606 lb) |
| Breaking Load | 825kg (1818 lb) |
Who This Is For
Sailors operating dinghies, sport boats, and small keelboats will benefit from this block's exceptional strength-to-weight ratio. It is ideal for those requiring reliable and easily adjustable systems for spinnaker sheets, guys, or code zero up-downs.
How It Compares
| Feature | Harken 40mm Twing Block | Competitor |
|---|---|---|
| Sheave Diameter (mm) | 40 | 20, 40 |
| Maximum Line Diameter (mm) | 12 | 6, 10 |
| Maximum Working Load (lb) | 606 | 440, 661 |
| Weight (oz) | 3 | 1.5, 4.5 |
| Opening Side Plate | Yes | No, No |
Common Concerns Answered
Is the Harken 40mm Twing Block a good value for the price?
While the initial investment might seem higher, the Carbo Air® construction delivers exceptional durability and performance, making it a cost-effective choice for serious sailors over the long term. Its lightweight design and ease of use contribute to a superior sailing experience that justifies the price.
What is the primary advantage of the Carbo Air® block construction?
Carbo Air® construction utilizes advanced composite materials to create a block that is both incredibly strong and remarkably lightweight. This translates to less inertia in your control lines, faster adjustments, and reduced overall weight on your vessel.
Can I expect this block to wear out quickly?
Harken blocks are engineered for longevity. While any block used heavily might eventually show wear on pivot components, this model is built to withstand significant use. Regular inspection and maintenance, typical for all sailing hardware, will ensure optimal performance.
Frequently Asked Questions
What is the maximum line diameter this Harken 40mm Twing Block can accommodate?
The Harken 40mm Twing Block is designed to accommodate lines with a maximum diameter of 12mm (3/8 inch).
What is the working load limit for the Harken 40mm Twing Block?
This Harken 40mm Twing Block has a maximum working load limit of 275kg (606 lb).
Can the Harken 40mm Twing Block be used for spinnaker sheets?
Yes, the Harken 40mm Twing Block is specifically designed and well-suited for managing spinnaker sheets and guys due to its strength and ease of adjustment.
What makes the Carbo Air® block construction beneficial?
The Carbo Air® block construction offers an exceptional strength-to-weight ratio, resulting in a block that is both robust enough for demanding loads and light enough to minimize inertia and improve sail trim responsiveness.
How does the opening side plate facilitate rigging?
The opening side plate is spring-biased, allowing it to be easily unlatched and swung open. This feature enables quick and convenient attachment or removal of the line without needing to thread it through the block, facilitating one-handed operation.
