Description
Ronstan Series 30 Ball Bearing Block | Boat Supply Store
Minimize friction and maximize control with the Ronstan Series 30 Ball Bearing Block, engineered for demanding sail control applications. This block boasts a 30mm sheave diameter and a maximum working load (MWL) of 300kg (660lbs), ensuring reliable performance under stress. Its advanced 2-stage ball bearing system, utilizing Acetal or Torlon® ball bearings, significantly reduces friction during load application and release, making it ideal for managing mainsheets, halyards, or vang systems on various sailing vessels.
Key Features
- Superior Low Friction with advanced 2-stage ball bearing system.
- Exceptional Load Capacity rated up to 300kg (660lbs) MWL.
- Lightweight Design at only 28g (1.0oz) for minimal rig impact.
- Durable Construction with Acetal/Torlon® sheaves and impact-modified Nylon cheeks.
- UV Resistance for extended lifespan in harsh marine environments.
- Corrosion Resistance with Grade 316 stainless steel fittings.
- Versatile Head Fitting for easy integration into existing systems.
- Precise Control for critical sail adjustments and line management.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm (1-3/16") |
| Max Rope Diameter | 8mm (5/16") |
| Max Working Load (MWL) | 300kg (660lbs) |
| Breaking Load (BL) | 750kg (1,650lbs) |
| Weight | 28g (1.0oz) |
| Bearing System | 2-stage ball bearing |
| Sheave Material | Acetal/Torlon® |
| Cheek Material | Impact modified, fiber reinforced and U.V. stabilized Nylon |
| Fittings Material | Grade 316 stainless steel |
Who This Is For
This block is specifically designed for dinghy and catamaran sailors who demand precise control and low friction. Owners of larger yachts will also find it highly effective for managing control lines requiring dependable performance.
How It Compares
| Feature | Ronstan Series 30 Ball Bearing Block | Harken 167 Single Swivel Block |
|---|---|---|
| Sheave Ø | 30mm | — |
| Max. Rope Ø | 8mm | — |
| M.W.L. | 300kg | — |
| Weight | 28g | 35g |
| Bearing System | 2-stage ball bearing | Plain bearing |
Common Concerns Answered
Is the price justified for this Ronstan block?
While the initial investment might seem higher, the Ronstan Series 30 Ball Bearing Block offers superior performance and longevity due to its advanced bearing system and robust materials, providing exceptional value over its operational lifespan.
How does Ronstan's reputation impact the quality of this block?
Ronstan is globally recognized for producing high-quality, durable marine hardware, and this Series 30 block upholds that standard with its precise engineering and robust construction, ensuring reliable functionality in challenging marine environments.
What if I'm concerned about the long-term durability of the block?
The Ronstan Series 30 block features impact-modified, fiber-reinforced, and UV-stabilized Nylon cheeks along with Acetal or Torlon® sheaves and stainless steel fittings, all designed for maximum resistance to wear, UV degradation, and corrosion, ensuring enduring performance.
Frequently Asked Questions
What is the maximum rope diameter this Ronstan Series 30 block can handle?
The Ronstan Series 30 Ball Bearing Block is designed to accommodate a maximum rope diameter of 8mm (5/16").
What is the working load limit (MWL) for the Ronstan Series 30 Ball Bearing Block?
The Maximum Working Load (MWL) for the Ronstan Series 30 Ball Bearing Block is 300kg (660lbs).
What are the applications for the Ronstan Series 30 Ball Bearing Block - Single - Loop Top?
This block is ideal for a wide range of applications including halyards, control lines, vangs, and reefing lines on dinghies, catamarans, and larger yachts requiring efficient and reliable line management.
What materials are used in the construction of the Ronstan Series 30 Ball Bearing Block?
The block is constructed with Acetal/Torlon® sheaves, impact-modified, fiber-reinforced and U.V. stabilized Nylon cheeks, and Grade 316 stainless steel load straps and head fittings.
How does the ball bearing system in this Ronstan block improve performance?
The advanced 2-stage ball bearing system, utilizing Acetal ball bearings, drastically reduces friction, allowing for smoother line movement under both static and dynamic loads, which translates to more responsive sail trim and easier handling.
