Description
Ronstan Series 40 Single Block | Boat Supply Store
This Ronstan Series 40 All Purpose Block addresses the need for robust, low-friction load management in demanding marine applications. With a 40mm (1-9/16") Acetal sheave and polished stainless steel races, it effectively handles lines up to 10mm (7/16") in diameter while maintaining a substantial 400kg (880lbs) Maximum Working Load. The innovative Captive Lock™ universal head allows for easy configuration as either fixed or swivel, making it a versatile component for mainsail, halyard, vang, or spinnaker control lines on vessels up to 8 meters (26 feet), including those operating in Texas's coastal or inland waterways.
Key Features
- High Working Loads: Handles demanding sail control with a 400kg MWL.
- Low Maintenance: Acetal sheaves and stainless steel races ensure longevity.
- Versatile Head Configuration: Captive Lock™ head converts between fixed and swivel.
- Durable Construction: Fiber-reinforced Nylon cheeks resist impact and UV.
- Smooth Operation: Self-lubricating Acetal sheaves minimize friction.
- Corrosion Resistance: Grade 316 stainless steel components for marine environments.
- Wide Rope Compatibility: Accommodates ropes up to 10mm (7/16").
- Reliable Performance: Engineered for consistent function under load.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 40mm (1-9/16") |
| Max Rope Diameter | 10mm (7/16") |
| Maximum Working Load (MWL) | 400kg (880lbs) |
| Breaking Load (BL) | 800kg (1,760lbs) |
| Weight | 72g (2.5oz) |
| Sheave Material | Acetal Polymer |
| Bearing Races | Polished Stainless Steel |
| Cheeks | Impact and U.V. resistant, fiber reinforced Nylon |
| Load Strap and Head Fitting | Grade 316 Stainless Steel |
| Head Type | Captive Lock™ Universal (Fixed or Swivel) |
Who This Is For
Cruising and racing sailors, dinghy sailors, and sportsboat owners will benefit from this block's high load capacity and durable construction. It is an ideal choice for anyone requiring a dependable single block for sheets, halyards, and control lines on boats up to 8 meters (26 feet).
How It Compares
| Feature | Ronstan Series 40 Single Block | Competitor |
|---|---|---|
| Sheave Ø | 40mm | — |
| Max. Rope Ø | 10mm | — |
| M.W.L. | 400kg | — |
| Head Type | Captive Lock™ Universal (Fixed or Swivel) | Swivel, Single Swivel |
| Sheave Material | Acetal Polymer | Acetal, Acetal |
Common Concerns Answered
Are mounting fasteners included with the Ronstan Series 40 All Purpose Block?
No, mounting fasteners are not included with this block. You will need to provide two 5mm (3/16") fasteners appropriate for your mounting surface.
I need a block with a wider swivel range. Is this the right block for me?
While the Captive Lock™ head offers a versatile fixed or swivel configuration, some specialized rigging setups may benefit from a block with a higher swivel range. Consider your specific application's articulation requirements.
Is this block durable enough for constant use?
Absolutely. Customer sentiment is highly positive, with users praising its durability, high load capacity, and smooth operation, all attributed to its robust construction with Acetal sheaves and stainless steel components.
Frequently Asked Questions
What is the maximum rope diameter this Ronstan Series 40 block can accommodate?
This Ronstan Series 40 block can accommodate ropes up to 10mm (7/16") in diameter.
What is the working load limit (MWL) for the Ronstan Series 40 All Purpose Block?
The Maximum Working Load (MWL) for the Ronstan Series 40 All Purpose Block is 400kg (880lbs).
What are the typical applications for the Ronstan Series 40 All Purpose Block?
Typical applications include mainsail, halyard, vang, and spinnaker control lines on boats up to 8 meters (26 feet), suitable for both cruising and racing scenarios.
How is the Captive Lock™ universal head on this block configured?
The Captive Lock™ universal head can be easily configured to be either fixed or swivel, providing flexibility in rigging setups.
What materials are used in the construction of the Ronstan Series 40 All Purpose Block?
The block features Acetal polymer sheaves, polished stainless steel bearing races, impact and U.V. resistant fiber-reinforced Nylon cheeks, and Grade 316 stainless steel load strap and head fitting.
