Description
SeaSure 25mm Treble Block w/ Center Becket | Boat Supply Store
For efficient mechanical advantage, this 25mm treble block facilitates the creation of powerful purchase systems. Its construction features robust marine-grade stainless steel side plates and rivets, ensuring superior corrosion resistance in harsh marine environments. The integrated Arnite sheave provides smooth operation with a maximum rope capacity of 8mm and a substantial breaking load of 1250kg, making it suitable for applications such as a 6:1 lifting system for dinghies or tenders.
Key Features
- 25mm Sheave Diameter for efficient rope management
- Marine-grade Stainless Steel Side Plates and Rivets for superior corrosion resistance
- Arnite Sheave offers durable and smooth operation
- Center Becket provides versatile attachment points for rigging
- Plain Bearing design for cost-effectiveness
- 1250kg Breaking Load ensures strength for demanding tasks
- 8mm Maximum Rope Capacity accommodates common rigging lines
- Ideal for creating purchase systems to gain mechanical advantage
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 25mm |
| Bearing Type | Plain Bearing |
| Side Plate Material | Marine-grade Stainless Steel |
| Sheave Material | Arnite |
| Rivet Material | Marine-grade Stainless Steel |
| Center Becket | Yes |
| Maximum Rope Capacity | 8mm |
| Breaking Load | 1250kg |
Who This Is For
Sailors and boat owners requiring a dependable component for rigging, halyard systems, or other load-bearing applications. DIY enthusiasts seeking a durable and cost-effective block for custom boat projects or workshop use.
How It Compares
| Feature | SeaSure 25mm Treble Block w/ Center Becket | Competitor |
|---|---|---|
| Sheave Diameter | 25mm | — |
| Bearing Type | Plain Bearing | Ball Bearing, Plain Bearing |
| Max Rope Diameter | 8mm | — |
| Breaking Load | 1250kg | null, 700kg |
| Side Plate Material | Marine-grade Stainless Steel | Composite, Anodised Aluminium |
| Center Becket | Yes | No, Yes |
Common Concerns Answered
Is the plain bearing less efficient than ball bearings?
While a plain bearing may offer slightly more friction than a ball bearing, it is generally sufficient for moderate loads and speeds typical in many purchase systems. For applications requiring extremely high speed or continuous heavy load operation, a ball bearing block would be preferred. However, for its intended uses, the plain bearing provides excellent durability and value.
Is the 1250kg breaking load sufficient for heavy-duty tasks?
The 1250kg breaking load is substantial and suitable for a wide range of recreational sailing applications, including purchase systems for lifting dinghies or sails. For extremely specialized or critical heavy-lift operations, users should consult with a marine rigging professional to ensure all components meet the specific load requirements.
How does the durability compare to other blocks?
This block features marine-grade stainless steel side plates and rivets, offering excellent resistance to corrosion and wear in saltwater environments. Combined with a hard-wearing Arnite sheave, it is designed for longevity and robust performance, representing a strong value proposition.
Frequently Asked Questions
What is the maximum rope diameter this block can accommodate?
The SeaSure 25mm Treble Block can accommodate a maximum rope diameter of 8mm.
What is the breaking load of the SeaSure 25mm Treble Block?
The breaking load of this block is rated at 1250kg.
What materials are used in the construction of this block?
The block is constructed with marine-grade stainless steel for the side plates and rivets, and features an Arnite sheave.
Can this block be used for lifting heavier objects?
With a breaking load of 1250kg and the ability to create purchase systems, it can be used for lifting moderately heavy objects. For instance, it's ideal for a 6:1 system to lift a small tender or outboard motor, but verify specific load requirements for very heavy items.
What kind of purchase system can be created with this block?
This treble block, especially with its center becket, is ideal for creating mechanical advantage systems. A common application is a 6:1 purchase system, which multiplies the pulling force by six, making tasks like hoisting sails or lifting objects significantly easier.
