Description
Ronstan Series 15 Ball Bearing Block | Boat Supply Store
For sailors and boaters demanding the utmost in compactness and efficiency for small dinghies and critical control lines, this Ronstan Series 15 Ball Bearing Utility Block delivers unparalleled performance. Its precision acetal sheave runs on stainless steel ball bearings, ensuring exceptionally low friction and high load-carrying capability for its diminutive size. The robust Grade 316 stainless steel cheeks provide structural integrity and corrosion resistance, making it suitable for applications such as vangs, cunningham, and tweaker systems.
Key Features
- Smallest and lightest ball bearing block available for minimalist rigging.
- Precision molded acetal sheave offers superior strength and UV resistance.
- Stainless steel ball bearings ensure high performance and extended low-friction operation.
- Single loop head with O-ring effectively separates running line from head lashing.
- UV stabilized acetal sheave resists degradation from prolonged sun exposure.
- Grade 316 stainless steel cheeks provide exceptional corrosion resistance in marine environments.
- Compact design ideal for space-constrained applications on dinghies and tenders.
- Durable construction engineered for demanding control line applications.
Specifications
| Product Specifications | |
|---|---|
| Sheave Material | UV stabilized acetal |
| Bearing Type | Stainless steel ball bearings |
| Cheek Material | Grade 316 stainless steel |
| Head Type | Single loop head with O-ring |
| MPN | RF15101 |
Who This Is For
Ideal for sailors and boaters outfitting small dinghies, beach cats, or performance keelboats with compact control lines. This block is engineered for applications like vangs, cunninghams, and tweakers where weight and space are at a premium.
How It Compares
| Feature | Ronstan Series 15 Ball Bearing Block | Competitor |
|---|---|---|
| Sheave Material | UV stabilized acetal | Nylon |
| Bearing Type | Stainless steel ball bearings | Ball bearings |
| Cheek Material | Grade 316 stainless steel | Nylon |
| Head Type | Single loop head with O-ring | Swivel bail |
| Max Line Diameter | Manufacturer Not Specified | 5/16 inches |
| Working Load Limit | Manufacturer Not Specified | — |
Common Concerns Answered
What is the maximum line diameter this block can accommodate?
The manufacturer has not provided a specific maximum line diameter for this block. However, based on its size and comparison to similar products, it is typically suitable for lines up to approximately 1/4 inch (6mm) for optimal performance and bearing efficiency.
What is the working load limit (WLL) for this Ronstan block?
The manufacturer has not published a specific Working Load Limit (WLL) for the Ronstan Series 15 Ball Bearing Utility Block. For critical applications, it is recommended to assess load requirements and consult with a marine rigging professional.
Will this block perform well in a saltwater environment?
Yes, the Grade 316 stainless steel cheeks and stainless steel ball bearings are highly resistant to corrosion, making this block well-suited for operation in saltwater environments, provided regular rinsing after exposure is maintained.
Frequently Asked Questions
What are the dimensions of the Ronstan Series 15 Ball Bearing Utility Block?
Specific overall dimensions are not provided by the manufacturer. However, it is recognized as the smallest and lightest ball bearing block available in its class, designed for minimal space requirements.
What is the weight of the Ronstan Series 15 Ball Bearing Utility Block?
The manufacturer has not provided the specific weight of this block. Its design emphasizes a lightweight construction, making it ideal for applications where weight reduction is critical.
Can this block be used for halyards or mainsheets on larger boats?
This block is specifically designed for light-duty control lines on smaller vessels or as secondary systems on larger boats. It is not intended for primary halyard or mainsheet loads on boats of significant size due to its compact nature and unspecified WLL.
How is the O-ring in the loop head beneficial?
The O-ring serves to prevent the running line from chafing against the block's head lashing or attachment point, thereby extending the lifespan of both the line and the block, and ensuring smoother operation.
What type of sailing applications is this block best suited for?
This block is ideal for dinghies, skiffs, and other small sailboats for control systems such as outhauls, cunningham, vang adjustments, reefing lines, and any application requiring a high-performance, low-friction block with minimal weight and footprint.
