Description
Harken 40mm Fixed Head Block | Boat Supply Store
Addressing the need for efficient and lightweight rigging solutions, this Harken block excels in reducing friction during sail trim. It accommodates lines up to 10mm (3/8 inch) with a robust 40mm sheave diameter, supporting a maximum working load of 220 kg (485 lb). This makes it ideal for mainsheet or jib sheet systems on dinghies and smaller keelboats navigating coastal waters.
Key Features
- Low-friction Carbo Air construction for superior performance
- Lightweight design minimizes system weight
- Compact dimensions for unobtrusive rigging
- High working loads ensure safety during trimming
- Reliable performance for consistent sail control
- Fixed head design simplifies specific rigging applications
- Durable construction for longevity
- Accessible price point offers excellent value
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 40mm (1-9/16 inch) |
| Maximum Line Diameter | 10mm (3/8 inch) |
| Maximum Working Load | 220 kg (485 lb) |
Who This Is For
Sailors and boaters prioritizing lightweight, strong, and reliable blocks for diverse rigging applications. It is particularly suited for those seeking high performance at an accessible price for dinghy, keelboat racing, or cruising control lines.
How It Compares
| Feature | Harken 40mm Fixed Head Block | Competitor |
|---|---|---|
| Sheave Diameter (mm) | 40 | 40 |
| Max Line Diameter (mm) | 10 | 10 |
| Max Working Load (kg) | 220 | 1000 |
| Weight | Lightweight (Carbo Air) | Typically less capable |
Common Concerns Answered
Is this block suitable for very high-load applications?
While offering very high working loads for its size at 220 kg (485 lb), some extremely high-load racing applications might necessitate a larger or more robust block. For typical dinghy and keelboat use, its capacity is generally sufficient.
How durable is the Carbo Air construction in harsh environments?
Carbo Air construction is engineered for lightweight strength and reliability. While generally robust, prolonged exposure to extremely abrasive conditions may impact longevity compared to heavier-duty metal blocks, though it provides excellent performance for its weight class.
Will the working load limit be a problem for my racing needs?
The maximum working load of 220 kg (485 lb) is substantial for many racing scenarios, particularly on smaller boats. However, if your specific application consistently generates loads significantly exceeding this, a block with a higher rating would be a more prudent choice.
Frequently Asked Questions
What is the maximum line diameter this Harken block can handle?
This Harken 40mm Carbo Block 90 Fixed Head is designed to accommodate a maximum line diameter of 10mm (3/8 inch).
What is the working load limit for the Harken 40mm Carbo Block 90 Fixed Head?
The maximum working load limit for this block is 220 kg (485 lb).
What are the advantages of Carbo Air blocks compared to traditional blocks?
Carbo Air blocks utilize advanced composite materials to achieve exceptional strength-to-weight ratios, significantly reducing system weight while maintaining high load capacities and low-friction performance compared to many traditional metal blocks.
Can this block be used with Dyneema or Spectra lines?
Yes, the low-friction sheave of this Harken block is well-suited for use with modern low-stretch lines such as Dyneema and Spectra.
What is the sheave diameter in imperial units?
The sheave diameter is 40mm, which converts to approximately 1-9/16 inches.
