Description
Ronstan Series 15 Ball Bearing Utility Block | Boat Supply Store
For sailors and boaters requiring superior control line management on dinghies and smaller keelboats, this Ronstan exit block delivers unparalleled efficiency. Its precision acetal sheave operates on robust stainless steel ball bearings, ensuring minimal friction and extended lifespan. Engineered with a single-piece housing, it minimizes rope chafe and facilitates straightforward installation, making it ideal for demanding applications like vangs and cunninghams.
Key Features
- Smallest and lightest ball bearing block available
- Precision molded acetal sheave running on stainless steel ball bearings
- Single loop head blocks include an O-ring to separate running line from head lashing or fixing
- Flush rivet to minimize cutout and facilitate installation
- Formed single piece housing for maximum strength and minimal rope wear
- UV stabilized acetal sheave for extended durability
- Grade 316 stainless steel cheeks for superior corrosion resistance
- Low-friction operation for effortless control line adjustments
Specifications
| Product Specifications | |
|---|---|
| Brand | Ronstan |
| Model | Series 15 Ball Bearing Utility Block - Exit Block |
| SKU | CWR71031 |
| MPN | RF15711 |
| Sheave Material | UV stabilized acetal |
| Bearing Material | Stainless steel ball bearings |
| Cheek Material | Grade 316 stainless steel |
| Head Style | Single loop with O-ring |
Who This Is For
Sailors and boaters who need a compact, high-performance, low-friction block for various control line applications on dinghies and small to medium-sized sailboats. Ideal for those prioritizing efficiency and durability in compact hardware.
How It Compares
| Feature | Ronstan Series 15 Ball Bearing Utility Block | Competitor |
|---|---|---|
| Sheave Material | UV stabilized acetal | Carbo-Tex, High-strength polymer |
| Bearing Material | Stainless steel | Carbo-Tex bearings, Stainless steel |
| Cheek Material | Grade 316 stainless steel | Carbon fiber composite, High-strength polymer |
| Weight | null | 20g, 25g |
Common Concerns Answered
Is the weight clearly specified?
While a specific weight metric is not provided in the product details, this block is recognized for being among the smallest and lightest ball bearing options available, prioritizing space-saving design.
Is the single loop head versatile enough for all rigging?
The single loop head with an integrated O-ring is designed for efficient separation of lines, which some users might find limiting for highly specialized rigging configurations. However, it excels in common applications like vang and cunningham systems.
Is this block worth the investment compared to cheaper plastic alternatives?
The Ronstan Series 15 block's construction with precision stainless steel bearings and Grade 316 stainless steel cheeks ensures superior performance, durability, and longevity, justifying the investment for serious sailors over basic plastic blocks.
Frequently Asked Questions
What is the maximum line size for the Ronstan Series 15 Ball Bearing Utility Block - Exit Block?
The Ronstan Series 15 Ball Bearing Utility Block is designed for small to medium-sized control lines, typically up to 8mm (5/16 inch) in diameter, based on its compact sheave dimensions.
What are the typical applications for this Ronstan block?
This block is exceptionally suited for dinghy control lines, vangs, cunninghams, tweakers, and shock cord tensioning systems on various small to medium sailboats.
What materials are used in the construction of this block?
The construction features a UV stabilized acetal sheave, precision stainless steel ball bearings, and Grade 316 stainless steel cheeks for optimal performance and longevity.
How does the flush rivet benefit installation?
The flush rivet is designed to minimize the cutout required for mounting, thereby streamlining the installation process and presenting a cleaner, more integrated finish on the deck or bulkhead.
What is the advantage of the single piece housing?
The single-piece housing provides maximum structural strength and integrity, while also being precisely formed to minimize rope wear by reducing potential snag points and creating a smooth bearing surface.
