Description
Ronstan Series 30 Triple Ball Bearing Block | Boat Supply Store
Engineered for dinghies up to 5 meters and control lines on larger vessels, this triple sheave block delivers exceptional performance under significant load. It boasts a 30mm Acetal sheave diameter and a Maximum Working Load (MWL) of 550kg (1,210lbs), ensuring reliability for mainsail, spinnaker, and halyard systems. The toughened, glass fiber reinforced Nylon frame and UV stabilized SK75 Dyneema® link contribute to an ultra-low friction environment and a remarkable strength-to-weight ratio of just 73g.
Key Features
- Achieve highest strength-to-weight ratio with advanced composite materials.
- Experience minimal friction due to precision-engineered ball bearings.
- Benefit from maximum durability with toughened, glass fiber reinforced Nylon cheeks.
- Enjoy weight reduction through fiber-reinforced composites.
- Utilize secure, versatile, and compact attachment options.
- Benefit from highest working load in its class for demanding applications.
- Ensure long-term UV resistance with SK75 Dyneema® link.
- Maintain a low profile for efficient rigging.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm |
| Maximum Rope Diameter | 8mm |
| Maximum Working Load (MWL) | 550kg (1,210lbs) |
| Breaking Load (BL) | 1,100kg (2,430lbs) |
| Weight | 73g (2.6oz) |
| Sheave Material | Acetal |
| Ball Bearing Material | Acetal |
| Frame/Cheeks Material | Toughened, glass fiber reinforced Nylon |
| Link Material | UV stabilized SK75 Dyneema® |
Who This Is For
Sailors and boaters with dinghies up to 5 meters (16 feet) requiring high-performance, lightweight, and durable blocks for mainsail, spinnaker, halyard, vang, and backstay systems, as well as control line applications on larger yachts.
How It Compares
| Feature | Ronstan Series 30 Triple Ball Bearing Block | Competitor |
|---|---|---|
| Sheave Ø | 30mm | — |
| Max. Rope Ø | 8mm | — |
| M.W.L. | 550kg (1,210lbs) | — |
| Weight | 73g (2.6oz) | 95g (3.35oz), 80g |
| Frame Material | Toughened, glass fiber reinforced Nylon | Composite, Composite |
Common Concerns Answered
Is the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple a good investment for a casual sailor?
While its price may seem higher initially, the superior strength-to-weight ratio, minimal friction, and exceptional durability of this block offer significant long-term value, particularly for sailors who prioritize performance and reliability in demanding conditions, justifying the investment for serious racers and cruisers.
Are there common issues with this block?
Official documentation and common reviews report no inherent issues with the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple model. Any perceived problems typically stem from user error in rigging, maintenance, or exceeding the specified working load limits.
How does the price compare to other high-performance blocks?
The Ronstan Series 30 Ball Bearing Orbit Block™ - Triple is priced competitively within the high-performance marine block market, offering excellent value when considering its advanced materials, exceptional load ratings, and lightweight design compared to similar offerings from Harken and Lewmar.
Frequently Asked Questions
What is the working load limit (MWL) of the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple?
The Maximum Working Load (MWL) for the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple is 550kg (1,210lbs).
What is the breaking load (BL) of the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple?
The Breaking Load (BL) for the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple is 1,100kg (2,430lbs).
What is the maximum rope diameter that can be used with this block?
This block is designed to accept a maximum rope diameter of 8mm.
What materials are used in the construction of the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple?
It features Acetal sheaves and ball bearings, a toughened glass fiber reinforced Nylon frame/cheeks, and a UV stabilized SK75 Dyneema® link.
What are the typical applications for the Ronstan Series 30 Ball Bearing Orbit Block™ - Triple?
Typical applications include mainsail, spinnaker, halyard, vang, and backstay systems on dinghies up to 5 meters (16 feet), as well as control line applications on larger yachts.
