Description
Ronstan Series 15 Ball Bearing Utility Block | Boat Supply Store
Engineered for the demands of dinghy and small keelboat control lines, this compact block minimizes friction for critical adjustments. Its UV-stabilized acetal sheave runs on precision stainless steel ball bearings, ensuring smooth operation under load. Featuring Grade 316 stainless steel cheeks and a 4-point fastening system, it provides durable, low-profile load distribution for applications like vangs and cunninghams, especially relevant for performance sailing on Texas' coastal waters.
Key Features
- Smallest and lightest ball bearing block for minimalist setups
- Precision molded acetal sheave ensures low friction and durability
- Stainless steel ball bearings deliver high performance
- UV stabilized construction withstands harsh marine conditions
- Single loop head with O-ring for effective line separation
- 4-point fastening distributes load and maintains a low profile
- Mountable without disassembly for straightforward installation
- Grade 316 stainless steel cheeks offer superior corrosion resistance
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 |
| Fastening Points | 4-point |
| Intended Use | Dinghy control lines, vangs, cunninghams, tweakers, shock cord tensioning systems |
Who This Is For
Sailors of dinghies and small keelboats, particularly those engaged in racing or performance cruising, who prioritize lightweight, high-efficiency control line management.
How It Compares
| Feature | Ronstan Series 15 Ball Bearing Utility Block | Harken |
|---|---|---|
| Sheave Material | UV stabilized acetal | Carbo-Plast |
| Bearing Type | Stainless steel ball bearings | Ball bearings |
| Cheek Material | Grade 316 stainless steel | High-strength composite |
| Head Type | Pivoting loop with O-ring | Swiveling |
| Weight | Smallest and lightest | Similar or lighter |
Common Concerns Answered
I'm concerned about the working load limit for my application.
This block is specifically designed for smaller boats and control lines where weight and friction reduction are paramount. For heavier loads or larger vessels, a block with a higher WLL would be more appropriate. Consult the product's specifications for its precise rating.
Is the O-ring a weak point or easy to lose?
While the O-ring ensures proper line separation, it's a small component. Careful handling during maintenance or line changes is advised. Its design contributes to the block's compact efficiency, and replacements are readily available if needed.
The price seems high for such a small block.
The Ronstan Series 15 utilizes precision stainless steel ball bearings and Grade 316 stainless steel cheeks, materials chosen for their durability, low friction, and corrosion resistance. This engineering ensures high performance and longevity in demanding marine environments, justifying the investment for critical control lines.
Frequently Asked Questions
What is the maximum line size for the Ronstan Series 15 Ball Bearing Utility Block?
While the exact maximum line diameter is not specified, this block is optimally designed for smaller diameter control lines typically found on dinghies and small keelboats, generally up to 1/4 inch (6mm).
What are the dimensions of the Ronstan Series 15 Ball Bearing Utility Block?
Specific dimensions are not provided in the technical data, but it is characterized as the smallest and lightest ball bearing block available, indicating a highly compact form factor.
What is the working load limit (WLL) for this block?
The working load limit (WLL) for this specific block is not provided in the available specifications. It is designed for lighter duty control lines on smaller vessels.
Can this block be used in saltwater environments?
Yes, the Grade 316 stainless steel cheeks and stainless steel ball bearings are specifically chosen for their excellent corrosion resistance, making this block suitable for use in saltwater environments.
What is the advantage of a pivoting lead block?
A pivoting lead block allows the block to align with the direction of the load, reducing friction and chafe on the line. This ensures smoother operation and extends the life of both the line and the block, especially when the load angle changes.
