Description
Ronstan Series 40 Block Fiddle w/ Cleat | Boat Supply Store
This Ronstan Series 40 block is engineered for demanding sailing applications, providing exceptional load capacity and low-friction control essential for efficient sail trim. Featuring Acetal or Torlon® ball bearings within its 2-stage system and robust fiber-reinforced Nylon cheeks, it ensures smooth operation under significant static and dynamic loads. Ideal for mainsails, halyards, vangs, and spinnaker control lines on off-the-beach catamarans or sportsboats up to 8m (26ft), it delivers reliable performance in competitive or cruising scenarios.
Key Features
- Low Friction: 2-stage ball bearing system (Acetal or Torlon®) minimizes resistance for optimal line handling.
- High Load Capacity: Engineered for significant static and dynamic loads, ensuring durability and performance.
- User-Friendly Maintenance: Cheek cut-outs facilitate easy bearing access and service.
- Versatile Head: Captive Lock™ universal head allows for multiple fixing angles.
- Secure Attachment: Slotted pin shackle and snap-fit removable becket pin simplify rigging and modification.
- Integrated Control: Multi-position cleat arm provides secure and adjustable line management.
- Durable Construction: Impact and UV resistant, fiber-reinforced Nylon cheeks ensure longevity.
- UV Protected Sheave: UV stabilized Acetal sheave resists degradation from sun exposure.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 40mm |
| Bearing System | 2-stage ball bearing (Acetal or Torlon®) |
| Cheek Material | Impact and UV resistant, fiber reinforced Nylon |
| Fitting Material | Grade 316 stainless steel |
| Sheave Material | UV stabilized Acetal |
| Cleat Type | Multi-position cleat arm |
| Head Type | Captive Lock™ universal head |
| Becket Pin Type | Snap fit removable |
| Max Boat Length | 8m (26ft) |
| Application | Mainsail, halyard, vang, spinnaker control lines |
Who This Is For
Sailors of off-the-beach catamarans, one design classes, and sportsboats up to 8m (26ft) requiring high-performance, low-friction blocks for critical control lines. Also suitable for larger vessels seeking precise adjustment of various control systems.
How It Compares
| Feature | Ronstan Series 40 Block Fiddle w/ Cleat | Competitor |
|---|---|---|
| Sheave Diameter | 40mm | — |
| Bearing System | 2-stage ball bearing (Acetal or Torlon®) | Ball Bearing, Ball Bearing |
| Cleat Type | Multi-position cleat arm | Ratcheting mechanism (no fixed cleat), Integrated cleat |
| Head Type | Captive Lock™ universal head | Swiveling head, Swiveling head |
| Becket Pin | Snap fit removable | Not applicable (no becket), Removable |
Common Concerns Answered
What is the typical lifespan of the bearings under heavy use?
While Acetal bearings offer excellent low friction, extended heavy use may lead to wear. The Torlon® bearing option significantly extends lifespan and performance under extreme loads.
Is the cleat function reliable for holding load?
The multi-position cleat arm is designed for secure line management in demanding sailing applications, providing a firm hold when tensioned.
How does the price compare to similar high-performance blocks?
While the initial investment may be higher than basic blocks, the superior performance, durability, and advanced features of the Ronstan Series 40 justify its price for serious racers and cruising sailors.
Frequently Asked Questions
What is the maximum safe working load (SWL) for the Ronstan Series 40 Ball Bearing Block?
Manufacturer documentation specifies a high static and dynamic load capacity suitable for demanding control lines on vessels up to 8m, though specific SWL ratings should be cross-referenced with official Ronstan load charts for precise application limits.
Can the becket pin be detached without tools for re-splicing a line?
Yes, the snap-fit removable becket pin allows for easy detachment without tools, facilitating line termination and maintenance.
How does the Captive Lock™ universal head provide versatility?
The Captive Lock™ head allows the block to be locked into multiple positions, offering flexibility in rigging angles and load orientation.
What specific materials are utilized in the construction of this block?
The block features UV stabilized Acetal sheaves, impact and UV resistant fiber-reinforced Nylon cheeks, and Grade 316 stainless steel load straps and head fittings for robust marine service.
What types of sailing applications is this block best suited for?
This block is ideal for mainsails, halyards, vangs, and spinnaker control lines on dinghies, sportsboats up to 8m, and for fine-tuning control lines on larger yachts.
