Description
Ronstan Series 30 Ball Bearing Orbit Block™ | Boat Supply Store
Engineered for demanding sailing applications, this high-performance block minimizes friction and delivers consistent operation under load. Its advanced all-composite construction provides an exceptional strength-to-weight ratio, featuring a 30mm sheave diameter capable of handling ropes up to 8mm with a 300kg Maximum Working Load. This precision-engineered component is crucial for optimizing control lines on dinghies up to 5m and control systems on larger vessels.
Key Features
- Unmatched strength-to-weight ratio via advanced composite construction.
- Precision 2-stage ball bearing system for ultra-low friction.
- Durable Acetal sheave and high-compression Acetal ball bearings.
- Toughened glass fiber reinforced Nylon frame for resilience.
- UV-stabilized Dyneema® link ensures longevity.
- Ultra-low profile thru-sheave becket for compact attachment.
- Significant weight reduction through fiber-reinforced composites.
- Secure, versatile, and compact attachment options.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 30mm |
| Max. Rope Diameter | 8mm |
| Maximum Working Load (MWL) | 300kg (660lbs) |
| Breaking Load (BL) | 600kg (1,320lbs) |
| Weight | 32g (1.1oz) |
| Sheave Material | High compression strength carbon black Acetal |
| Ball Bearing Material | High compression strength Acetal |
| Frame/Cheeks Material | Toughened, glass fiber reinforced Nylon |
| Link Material | UV stabilized, multi-strand impregnated SK75 Dyneema® |
Who This Is For
Sailors and boaters with dinghies up to 5m (16') seeking high-performance, lightweight, and durable blocks for essential control lines. Also suitable for specific control line applications on larger yachts where efficiency is paramount.
How It Compares
| Feature | Ronstan Series 30 Ball Bearing Orbit Block™ | Competitor |
|---|---|---|
| Sheave Ø | 30mm | — |
| Max. Rope Ø | 8mm | — |
| M.W.L. | 300kg (660lbs) | — |
| Weight | 32g (1.1oz) | 31 g (1.1 oz), 43 g |
| Materials | Acetal Sheave, Acetal Ball Bearings, Glass Fiber Reinforced Nylon Cheeks, SK75 Dyneema® Link | Carbo™ Ratch block with composite cheeks and sheave, Composite sheave and cheeks |
Common Concerns Answered
Is the initial cost of this block higher than basic alternatives?
While the initial investment for the Ronstan Series 30 Ball Bearing Orbit Block™ may exceed that of simpler blocks, its superior performance, exceptional durability, and significant weight savings offer a justifiable long-term value for serious sailors.
What maintenance is required for the swivel shackle head?
While rare, the swivel shackle head can become stiff if not properly maintained. Regular rinsing with fresh water and periodic lubrication will ensure smooth articulation and longevity, preventing potential stiffness.
Can this block be used in harsh marine environments?
Absolutely. The block is constructed from toughened, glass fiber reinforced Nylon and high-strength composites, including UV-stabilized Dyneema® for the link, ensuring resilience and consistent performance even in demanding marine conditions.
Frequently Asked Questions
What is the working load limit (MWL) for the Ronstan Series 30 Ball Bearing Orbit Block™?
The Ronstan Series 30 Ball Bearing Orbit Block™ has a Maximum Working Load (MWL) of 300kg (660lbs).
What is the breaking load (BL) for the Ronstan Series 30 Ball Bearing Orbit Block™?
The Breaking Load (BL) for the Ronstan Series 30 Ball Bearing Orbit Block™ is 600kg (1,320lbs).
What is the maximum rope diameter this block can accommodate?
This block is designed to accommodate ropes with a maximum diameter of 8mm.
What materials are used in the construction of the Ronstan Series 30 Ball Bearing Orbit Block™?
The block features an Acetal sheave, Acetal ball bearings, Toughened glass fiber reinforced Nylon frame/cheeks, and a UV-stabilized, multi-strand impregnated SK75 Dyneema® link.
How does the ball bearing system in this block reduce friction?
The precision-engineered 2-stage ball bearing system utilizes an optimum number of high-compression strength Acetal ball bearings to minimize friction, ensuring smooth and consistent performance across its load range.
