Description
Ronstan Series 50 Ball Bearing Block | Boat Supply Store
Engineered for demanding sailing applications, this block achieves superior load handling and consistent low friction through its advanced 2-stage ball bearing system. It supports a maximum rope diameter of 1/2 inch with a substantial Working Load Limit (WLL) of 1100 lbs, making it ideal for control lines on performance cruisers or competitive dinghies. Constructed with acetal ball bearings, a UV-stabilized acetal sheave, and Grade 316 stainless steel fittings, this block ensures longevity and reliable performance in harsh marine environments.
Key Features
- Achieve high performance and low friction with Acetal or Torlon® ball bearings.
- Maintain consistent performance across the load range with a 2-stage ball bearing system.
- Benefit from high static and dynamic load capacity for robust rigging.
- Experience lightweight design for ease of handling and installation.
- Facilitate easy bearing maintenance through cheek cut-outs.
- Utilize a UV-stabilized acetal sheave for enhanced durability.
- Rely on Grade 316 stainless steel for the load strap and head fitting.
- Trust impact and UV-resistant fiber-reinforced nylon cheeks for resilience.
Specifications
| Product Specifications | |
|---|---|
| Sheave diameter | 2 inches |
| Max rope diameter | 1/2 inch |
| Working Load Limit (WLL) | 1100 lbs |
| Breaking Load (BL) | 3310 lbs |
| Weight | 3.4 oz |
| Ball Bearing Material | Acetal |
| Sheave Material | UV-stabilized acetal |
| Fittings Material | Grade 316 stainless steel |
| Cheek Material | Impact and UV-resistant, fiber-reinforced nylon |
Who This Is For
Sailors and boaters requiring high-performance, low-friction, and durable blocks for their sailing systems, particularly those involved in racing or demanding cruising where efficiency and reliability are paramount.
How It Compares
| Feature | Ronstan Series 50 Ball Bearing Block | Competitor |
|---|---|---|
| Sheave Diameter | 2 inches | — |
| Max Rope Diameter | 1/2 inch | — |
| Working Load Limit (WLL) | 1100 lbs | — |
| Bearing Type | 2-stage ball bearing (Acetal or Torlon®) | Carbo Ratchomatic (likely composite bearings), Synchro |
| Weight | 3.4 oz | Varies (typically lighter for smaller size), Varies |
Common Concerns Answered
Are there any known issues with this Ronstan block?
No widespread issues are reported for this specific model, indicating a high level of customer satisfaction. While the price may be higher than basic blocks, this is generally considered justified by its superior performance and durability.
Why is this block more expensive than simpler options?
The initial cost reflects the advanced 2-stage ball bearing system, robust construction with Grade 316 stainless steel, and impact-resistant nylon cheeks, all contributing to superior performance, longevity, and reduced wear on lines.
Is this block suitable for heavy-duty applications?
Yes, with a Working Load Limit (WLL) of 1100 lbs and a Breaking Load (BL) of 3310 lbs, this block is engineered for demanding sailing, including racing and performance cruising, where reliability under load is critical.
Frequently Asked Questions
What is the maximum rope diameter this Ronstan Series 50 block can accommodate?
The Ronstan Series 50 Ball Bearing Block is designed to accommodate a maximum rope diameter of 1/2 inch.
What is the Working Load Limit (WLL) for the Ronstan Series 50 Ball Bearing Block?
The Working Load Limit (WLL) for this Ronstan Series 50 Ball Bearing Block is 1100 lbs.
What are the sheave diameter and the breaking load of this Ronstan block?
The sheave diameter is 2 inches, and the Breaking Load (BL) is 3310 lbs.
What materials are used in the construction of the Ronstan Series 50 Ball Bearing Block?
This block is constructed with acetal ball bearings, a UV-stabilized acetal sheave, Grade 316 stainless steel fittings, and impact and UV-resistant, fiber-reinforced nylon cheeks.
How does the 2-stage ball bearing system benefit the performance of this block?
The 2-stage ball bearing system provides consistent low friction and high static and dynamic load capacity, ensuring smooth operation and efficient load transfer across the entire load range.
