Description
Lewmar 72mm Synchro Block - Single | Boat Supply Store
Engineered for peak performance, this 72mm Synchro Block is designed to significantly reduce friction in high-load applications. Its Free-Spin bearing and self-aligning head contribute to up to 40% increased efficiency over standard blocks, ensuring smoother sail trim and reduced rope wear. With a robust 2420lb Working Load Limit and the capacity to handle lines up to 0.47" (12mm), it is an essential upgrade for offshore racing yachts and performance cruising vessels navigating the Gulf Coast's variable conditions.
Key Features
- Maximized Efficiency: Achieve up to 40% greater efficiency than budget blocks.
- Reduced Friction: Free-Spin bearing ensures effortless sheave rotation.
- Self-Aligning Head: Adapts to load angles for optimal performance and reduced wear.
- Enhanced Strength: Stainless steel strap provides superior durability and service life.
- Line Protection: Stiff glass fiber reinforced cheeks prevent jamming.
- Tool-Free Adjustment: Swivel locking mechanism operates without specialized tools.
- Precision Engineering: Scientifically optimized block geometry for superior load distribution.
- Extended Lifespan: Robust construction withstands demanding sailing environments.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 72mm |
| Working Load Limit | 2420lb |
| Weight | 6.69oz |
| Maximum Line Size | 0.47" (12mm) |
| Block Type | Single |
| Strap Material | Stainless steel |
| Cheek Material | Glass fiber reinforced |
Who This Is For
Sailors and boaters aiming to elevate their mainsheet system's performance through increased efficiency and reduced friction. Ideal for those prioritizing a tangible performance advantage and extended lifespan for their rigging components.
How It Compares
| Feature | Lewmar 72mm Synchro Block - Single | Competitor |
|---|---|---|
| Sheave Diameter | 72mm | — |
| Working Load Limit | 2420lb | 2200 lb |
| Weight | 6.69oz | 5.6 oz |
| Maximum Line Size | 0.47" (12mm) | 1/2" |
| Efficiency Improvement | Up to 40% | Not specified |
| Head Type | Self-aligning swivel | Swivel Ratchomatic |
| Strap Material | Stainless steel | Composite |
| Cheek Material | Glass fiber reinforced | Composite |
Common Concerns Answered
Why is this block more expensive than basic options?
The Lewmar Synchro Block represents a significant engineering investment, utilizing specialized components like the Free-Spin bearing and a self-aligning head for up to 40% enhanced efficiency. This premium construction and performance gain justify the initial cost for serious sailors seeking long-term durability and reduced friction.
Does the swivel mechanism need frequent maintenance?
While the Synchro Block is designed for robustness, occasional lubrication of the swivel mechanism is recommended for optimal, consistent performance, particularly in high-salinity environments or after prolonged use.
Can I use this block on any sailboat?
This block is specifically designed for performance-oriented sailing. While versatile, its benefits are most pronounced on boats where mainsheet efficiency, reduced friction, and load-bearing capacity of 2420lb are critical for optimizing sail trim and sail shape.
Frequently Asked Questions
What is the working load limit of the Lewmar 72mm Synchro Block - Single?
The working load limit for the Lewmar 72mm Synchro Block - Single is 2420lb.
What is the maximum line size this block can accommodate?
This block is designed to accommodate lines with a maximum diameter of 0.47 inches (12mm).
How does the Synchro Block reduce friction compared to budget blocks?
The Synchro Block reduces friction through its precisely engineered Free-Spin bearing, which minimizes rotational resistance, and its scientifically optimized sheave geometry, ensuring smooth line passage. This combination results in up to 40% greater efficiency than standard blocks.
What are the benefits of the stainless steel strap and glass fiber reinforced cheeks?
The stainless steel strap provides exceptional strength and extends the service life of the block under high loads. The stiff glass fiber reinforced cheeks are crucial for preventing the control line from wedging, ensuring reliable operation.
Is the head of the Lewmar 72mm Synchro Block self-aligning?
Yes, the head of the Lewmar 72mm Synchro Block features a self-aligning design that automatically adjusts to the angle of the load, ensuring optimal performance and reducing chafe on the line and block.
