Description
Ronstan Nylatron Sheave Box Block | Boat Supply Store
This Ronstan single upright lead block is engineered to minimize friction in your running rigging systems. Its high-load capacity of 1200 lbs (540 kg) ensures reliable performance under stress. The 50mm diameter Nylatron sheave, manufactured from a self-lubricating polymer, reduces wear on lines and enhances efficiency, making it suitable for systems on dinghies or cruising keelboats.
Key Features
- Reduced friction with a precision Nylatron sheave.
- High load capacity of 1200 lbs (540 kg).
- Durable construction for marine environments.
- Efficient line handling due to low-friction sheave material.
- Compact design for minimal space requirement.
- Single upright configuration for direct leads.
- Reliable operation in various sea conditions.
- Easy integration into existing rigging.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 50 mm |
| Max Line Diameter | 10 mm |
| Working Load Limit (WLL) | 1200 lbs (540 kg) |
| Breaking Strength | 3600 lbs (1620 kg) |
| Weight | 0.14 lbs (65 g) |
| Sheave Material | Nylatron |
Who This Is For
Sailors requiring efficient and durable running rigging components for dinghies, day sailors, or smaller keelboats. This block is ideal for those seeking to reduce friction and improve the performance of their halyard, vang, or control line systems.
How It Compares
| Feature | Ronstan Nylatron Sheave Box Block | Harken Micro Block |
|---|---|---|
| Sheave Diameter | 50 mm | — |
| Max Line Diameter | 10 mm | — |
| Working Load Limit | 1200 lbs | — |
| Sheave Material | Nylatron | Nylon |
Common Concerns Answered
How does the Nylatron sheave benefit my running rigging?
The Nylatron sheave is a self-lubricating polymer designed for extremely low friction, which reduces wear on your lines and allows them to run more smoothly. This enhanced efficiency can improve overall sail trim and control.
What is the maximum load this block can safely handle?
This Ronstan block has a Working Load Limit (WLL) of 1200 lbs (540 kg), ensuring its suitability for demanding applications on various sailboat sizes. Always ensure your rigging system's load does not exceed this specification.
Is this block suitable for saltwater environments?
Yes, the materials used in this Ronstan block are selected for their durability and resistance to corrosion, making it well-suited for operation in harsh saltwater conditions.
Frequently Asked Questions
What is the purpose of an upright lead block?
An upright lead block, like this one, is used to change the direction of a line by 90 degrees, guiding it cleanly from its source to an exit point with minimal friction. It is often used at the base of a mast or along a deck edge.
What is the maximum diameter of line that can be used with this block?
This block is designed to accommodate lines up to a maximum diameter of 10 mm.
What is the weight of this block?
The Ronstan Nylatron Sheave Box weighs just 0.14 lbs (65 g), contributing minimally to overall rigging weight.
What is the breaking strength of this block?
The breaking strength of this block is rated at 3600 lbs (1620 kg), significantly exceeding its working load limit for a robust safety margin.
Can this block be used for both halyards and control lines?
Yes, its high load capacity and low-friction sheave make it versatile for various running rigging applications including halyards, vang systems, reefing lines, and other control lines.
