Description
Ronstan Series 20 Ball Bearing Block | Boat Supply Store
This Ronstan Series 20 Ball Bearing Block is engineered for demanding dinghy and small keelboat control lines, delivering exceptional performance through its precision-molded Acetal sheaves and high-quality stainless steel or Torlon® ball bearings. Its design minimizes friction and maximizes load capacity, making it ideal for applications like vangs, cunningham, and traveler controls on vessels operating in coastal or offshore environments. Constructed with UV-stabilized Acetal, Grade 316 stainless steel, and fiber-reinforced Nylon cheeks, this block offers both durability and lightweight functionality.
Key Features
- Low friction performance for effortless line control
- High load capacity for demanding sailing applications
- Lightweight construction minimizes deck clutter and improves handling
- Precision molded Acetal sheaves ensure smooth operation
- Stainless steel or Torlon® ball bearings provide superior load handling
- UV stabilized Acetal sheave resists degradation from sunlight
- Grade 316 stainless steel load strap and head fitting for corrosion resistance
- Impact and UV resistant, fiber reinforced Nylon cheeks for enhanced durability
Specifications
| Product Specifications | |
|---|---|
| Sheave Material | UV stabilized Acetal |
| Bearing Type | Stainless steel or Torlon® ball bearings |
| Cheek Material | Fiber reinforced Nylon |
| Load Strap & Head Fitting Material | Grade 316 stainless steel |
| Ratcheting Function | No |
| Stand-up Loop Top | Yes |
Who This Is For
Sailors of dinghies and small keelboats requiring high-performance, low-friction control line hardware. Ideal for applications such as vangs, cunningham, and traveler controls where efficiency is paramount.
How It Compares
| Feature | Ronstan Series 20 Ball Bearing Block | Competitor |
|---|---|---|
| Sheave Material | UV stabilized Acetal | High-strength composite |
| Bearing Type | Stainless steel or Torlon® ball bearings | Ball bearings |
| Cheek Material | Fiber reinforced Nylon | High-strength composite |
| Load Strap & Head Fitting Material | Grade 316 stainless steel | Composite |
| Ratcheting Function | No | Yes |
Common Concerns Answered
Will this block handle thicker control lines?
While this block is optimized for performance on dinghies and small boats, users with exceptionally thick lines might find a larger sheave diameter block more suitable. However, for standard dinghy control line sizes, its performance is exceptional.
Is the Torlon® bearing option readily available?
The Torlon® bearing option offers superior performance, but its availability can vary by retail channel. For immediate availability, the standard stainless steel bearing option provides excellent durability and low friction.
Is this block worth the price compared to simpler blocks?
The Ronstan Series 20 Ball Bearing Block's price reflects its advanced engineering, utilizing precision Acetal sheaves and high-quality ball bearings for significantly lower friction and higher load capacity. This translates to more efficient sail trim and enhanced longevity, offering superior value for performance-oriented sailors.
Frequently Asked Questions
What are the primary applications for the Ronstan Series 20 Ball Bearing Block?
This block is primarily designed for control line applications on dinghies and small keelboats, including vangs, cunningham, and traveler controls, where low friction and high load capacity are critical.
What materials are used in the construction of the Ronstan Series 20 Ball Bearing Block?
The block features UV stabilized Acetal sheaves, stainless steel or Torlon® ball bearings, Grade 316 stainless steel load strap and head fitting, and fiber reinforced Nylon cheeks.
What is the load capacity of the Ronstan Series 20 Ball Bearing Block?
While a specific numerical value is not provided in the standard specifications, the design emphasizes high static and dynamic load capacity suitable for demanding dinghy and small boat control systems.
How does the ball bearing system in this block contribute to its performance?
The stainless steel or Torlon® ball bearings reduce friction between the sheave and the bearing surface, allowing the sheave to rotate with minimal resistance, which is crucial for efficient line movement under load.
Is this block suitable for use in harsh marine environments?
Yes, the block is constructed with UV stabilized Acetal, Grade 316 stainless steel, and impact and UV resistant fiber reinforced Nylon cheeks, making it well-suited for harsh marine environments.
