Description
Ronstan Wire Block 25mm | Boat Supply Store
Engineered for demanding wire rigging applications, this Ronstan block provides a specialized groove optimized for wire up to 3mm in diameter. Its robust construction features Grade 316 stainless steel cheeks ensuring exceptional corrosion resistance in harsh marine environments, alongside a durable 25mm Nylatron sheave for friction-free operation. Ideal for critical control lines such as halyards, vangs, and backstays on offshore cruisers navigating the Gulf of Mexico.
Key Features
- Purpose-designed narrow sheave and groove for secure wire handling
- Corrosion-resistant Grade 316 stainless steel cheeks for longevity
- Smooth operation via durable Nylatron® sheave
- Secure tubular rivet head design
- Optimal performance with 25mm (1") sheave diameter
- High strength for critical control lines
- Marine-grade construction for harsh conditions
- Reliable performance on wire rigging
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 25mm (1") |
| Max Cable Diameter | 3mm (1/8") |
| Max Working Load (MWL) | 450kg (990lbs) |
| Breaking Load (BL) | 900kg (1,980lbs) |
| Weight | 40g (1.4oz) |
| Cheek Material | Grade 316 Stainless Steel |
| Sheave Material | Nylatron® |
| Head Type | Tubular Rivet Head |
Who This Is For
Sailors and marine professionals requiring a specialized, robust block for wire rigging applications up to 3mm in diameter. It is ideal for critical control lines such as halyards, vangs, and backstays on vessels operating in demanding saltwater conditions.
How It Compares
| Feature | Ronstan Wire Block 25mm | Competitor |
|---|---|---|
| Sheave Diameter | 25mm (1") | — |
| Max Cable/Line Diameter | 3mm (1/8") | — |
| Max Working Load Limit (MWL) | 450kg (990lbs) | — |
| Cheek Material | Grade 316 Stainless Steel | Composite, Composite |
| Sheave Material | Nylatron® | High-performance composite, High-performance composite |
| Designed for Wire | Yes | No, No |
Common Concerns Answered
Is the MWL sufficient for very heavy-duty applications?
While the 450kg (990lbs) MWL is perfectly suited and rated for its intended wire size up to 3mm, users requiring significantly higher loads for general purpose rigging might find it lower than some larger, multi-purpose blocks. This block's design is optimized for wire efficiency and safety.
Are replacement parts readily available?
Ronstan is a leading marine hardware manufacturer known for its quality. While specific replacement parts availability can vary, the robust construction of this block minimizes the need for replacements under normal operating conditions. For any issues, contacting BoatSupplyStore.com will provide the best resolution.
Why choose a specialized wire block over a standard block?
This Ronstan wire block features a narrow sheave and groove specifically engineered to securely seat and efficiently run wire rigging up to 3mm. Standard blocks may not provide the same level of grip, wear resistance, or efficient load transfer when used with wire, potentially leading to premature wear on both the wire and the block.
Frequently Asked Questions
What is the maximum cable diameter this Ronstan wire block can accommodate?
The Ronstan RF418 wire block is designed to accommodate wire cable with a maximum diameter of 3mm (1/8").
What is the working load limit (MWL) for the Ronstan RF418 wire block?
The maximum working load (MWL) for the Ronstan RF418 wire block is 450kg (990lbs).
What materials are used in the construction of the Ronstan RF418 wire block?
The Ronstan RF418 wire block is constructed with durable Grade 316 stainless steel cheeks and a high-performance Nylatron® sheave.
What are the typical applications for Ronstan wire blocks like the RF418?
Typical applications include halyards, vangs, backstays, and other control lines where wire rigging up to 3mm is utilized, common on various sailing vessels.
What is the sheave diameter of the Ronstan RF418 wire block?
The sheave diameter of the Ronstan RF418 wire block is 25mm (1").
