Description
Lewmar 90mm Synchro Block - Single | Boat Supply Store
Maximize mainsheet efficiency and minimize line wear with the Lewmar 90mm Synchro Block, engineered for superior performance. Its Free-Spin bearing and self-aligning head synchronize with rope movement, delivering up to 40% greater efficiency than standard blocks by significantly reducing friction. Rated for a robust 4400lb working load limit and accommodating lines up to 0.55" (14mm), this block is ideal for enhancing control on larger keelboats operating in challenging coastal waters.
Key Features
- Optimized Efficiency: Achieves up to 40% increased efficiency through precisely engineered components.
- Reduced Friction: Free-Spin bearing and self-aligning head synchronize with rope for smoother operation.
- Enhanced Durability: Stainless steel strap provides superior strength and extended service life.
- Prevent Line Jamming: Stiff glass fiber reinforced cheeks prevent lines from wedging under load.
- Tool-Free Adjustment: Features a convenient tool-free sliding swivel locking mechanism.
- High Load Capacity: Engineered with a substantial 4400lb working load limit for demanding applications.
- Maximized Line Compatibility: Accommodates lines up to a 0.55" (14mm) diameter for versatile use.
- Self-Aligning Head: Ensures optimal load distribution and reduced sheave wear.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 90mm |
| Working Load Limit | 4400lb |
| Weight | 14.57oz |
| Maximum Line Size | 0.55" (14mm) |
| Strap Material | Stainless Steel |
| Cheek Material | Glass fiber reinforced |
| Swivel Lock | Tool-free sliding swivel |
Who This Is For
Sailors and boaters focused on optimizing their mainsheet systems for enhanced performance and longevity. This block is specifically designed for those seeking tangible reductions in friction and wear, contributing to more efficient sail control.
How It Compares
| Feature | Lewmar 90mm Synchro Block - Single | Competitor |
|---|---|---|
| Sheave Diameter | 90mm | — |
| Working Load Limit | 4400lb | 3500lb, 3086lb |
| Weight | 14.57oz | 7.4oz, 5.6oz |
| Max Line Diameter | 0.55" (14mm) | — |
| Strap Material | Stainless Steel | Composite, Composite |
Common Concerns Answered
Is the price of the Lewmar 90mm Synchro Block justified compared to simpler alternatives?
The higher price point of the Synchro Block is directly attributed to its advanced engineering, including the Free-Spin bearing and self-aligning head, which deliver demonstrably superior efficiency and reduced friction, translating to longer component lifespan and smoother sail control.
Are there lighter weight block options available for racing applications?
While this Synchro Block prioritizes strength and efficiency with a weight of 14.57oz, lighter composite-based blocks exist for highly weight-sensitive racing scenarios. However, they typically sacrifice some load capacity and durability compared to this robust stainless steel and glass fiber construction.
What makes the Synchro Block more efficient than budget blocks?
The Synchro Block's efficiency stems from its precisely engineered Free-Spin bearing and self-aligning head, which work in unison with rope movement to minimize friction and wear, offering up to a 40% improvement over standard budget blocks.
Frequently Asked Questions
What is the working load limit of the Lewmar 90mm Synchro Block - Single?
The working load limit for the Lewmar 90mm Synchro Block - Single is 4400lb.
What is the maximum line size this block can accommodate?
This block is designed to accommodate a maximum line size of 0.55" (14mm).
How does the Synchro Block reduce friction compared to other blocks?
The Synchro Block employs a Free-Spin bearing and a self-aligning head that synchronize with rope movement, actively reducing friction and wear on both the rope and the block's sheave.
What are the benefits of the stainless steel strap?
The stainless steel strap provides enhanced structural strength, greater resistance to corrosion, and contributes to a longer service life for the block, especially in harsh marine environments.
Can the head of the Synchro Block be locked without tools?
Yes, the head of the Lewmar 90mm Synchro Block - Single features a tool-free sliding swivel locking mechanism, allowing for easy adjustment and securing.
