Description
Ronstan Series 30 Triple Orbit Block | Boat Supply Store
This triple sheave block with becket is engineered for sailors demanding maximum load capacity and minimal friction in compact offshore and racing environments. It boasts a 550kg (1,210lbs) Maximum Working Load (MWL) with 30mm (1-3/16") Acetal sheaves and precision ball bearings, ensuring efficient load transfer and durability. Constructed from toughened glass fiber reinforced Nylon cheeks, this block is optimized for use on dinghy mainsails, spinnakers, and larger yacht control lines, offering a superior strength-to-weight ratio essential for performance sailing.
Key Features
- Unrivaled strength-to-weight ratio for peak performance
- All-composite reinforced polymer materials for extreme durability
- Precision design minimizing friction for optimal ball bearing action
- Weight reduction achieved through advanced fiber-reinforced composites
- Extremely lightweight for enhanced sail handling and responsiveness
- Highest working load in its size class for demanding applications
- Secure, versatile, and compact attachment options
- Low profile design for minimal aerodynamic drag
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm (1-3/16") |
| Max Rope Diameter | 8mm (5/16") |
| Maximum Working Load (MWL) | 550kg (1,210lbs) |
| Breaking Load (BL) | 1,100kg (2,430lbs) |
| Weight | 75g (2.6oz) |
| Sheave Material | Acetal |
| Ball Bearing Material | Acetal |
| Cheek Material | Toughened glass fiber reinforced Nylon |
| Link Material | UV-stabilized Dyneema® |
Who This Is For
Sailors of dinghies up to 5m (16') requiring high-performance, lightweight, and durable blocks for mainsail and spinnaker sheets, halyards, vangs, and backstays. It is also suitable for control line applications on larger yachts.
How It Compares
| Feature | Ronstan Series 30 Triple Orbit Block | Competitor |
|---|---|---|
| Sheave Ø | 30mm (1-3/16") | — |
| Max. Rope Ø | 8mm (5/16") | — |
| M.W.L. | 550kg (1,210lbs) | — |
| Weight | 75g (2.6oz) | 50g (1.8oz), 60g |
| Block Type | Triple - Becket | Single Swivel, Single - Becket |
Common Concerns Answered
Is this block overkill for casual sailing?
While its premium construction offers superior performance, this block's exceptional strength-to-weight ratio and precision engineering make it an excellent investment for sailors of smaller craft and competitive racers who prioritize durability and efficiency, even for frequent use.
How does the price compare to other blocks?
This Ronstan block represents a premium investment, offering a higher Maximum Working Load (550kg) and advanced composite construction compared to simpler blocks in a similar size class. Its price reflects its superior engineering and performance for demanding sailing applications.
Can this block handle very heavy loads?
With a Maximum Working Load (MWL) of 550kg (1,210lbs) and a Breaking Load (BL) of 1,100kg (2,430lbs), this block is engineered to handle significant loads, making it suitable for applications where robust performance and safety are paramount, even on larger yachts for control lines.
Frequently Asked Questions
What is the working load limit (MWL) for the Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket?
The Maximum Working Load (MWL) for this block is 550kg (1,210lbs).
What is the maximum rope diameter this block can accommodate?
This block is designed to accommodate a maximum rope diameter of 8mm (5/16").
What materials are used in the construction of this Ronstan block?
The block features Acetal sheaves and ball bearings, toughened glass fiber reinforced Nylon cheeks, and a UV-stabilized Dyneema® link.
What are the typical applications for the Ronstan Series 30 Ball Bearing Orbit Block - Triple - Becket?
Typical applications include mainsail and spinnaker sheets, halyards, vangs, and backstays on dinghies up to 5m (16'), as well as control line applications on larger yachts.
How does the weight of this block compare to its load capacity?
This block offers an exceptional strength-to-weight ratio, weighing only 75g (2.6oz) while supporting a Maximum Working Load (MWL) of 550kg (1,210lbs), indicating a highly efficient and robust design.
