Description
Lewmar 72mm HTX Single Block | Boat Supply Store
Engineered for demanding sailing applications, this 72mm single block excels in high-load systems where precise line adjustment is critical. Its robust aluminum construction and plain central bearing ensure exceptional efficiency under extreme loads, supporting a maximum line diameter of 0.55" (14mm). This design, drawing from Lewmar's performance racing heritage, features Delrin ball bearings to manage side thrust, contributing to a substantial working load limit of 4405lb, making it ideal for offshore racing or cruisers operating in rigorous conditions.
Key Features
- Durable aluminum side cheeks withstand harsh marine environments.
- Efficient central plain bearing operates smoothly under high loads.
- Stable side thrust handled by Delrin ball bearings.
- Secure head design inspired by Lewmar Racing Range.
- Lockable swivel head via grub screw mechanism.
- High Capacity suitable for 0.55" (14mm) lines.
- Powerful 4405lb working load limit.
- Reliable performance for critical rigging systems.
Specifications
| Product Specifications | |
|---|---|
| Sheave Diameter | 72mm |
| Working Load Limit | 4405lb |
| Weight | 15.6oz |
| Maximum Line Size | 0.55" (14mm) |
| Side Cheek Material | Aluminum |
| Bearing Type | Plain central bearing, Delrin ball bearings for side thrust |
| Head Type | Grub screw swivel head locking mechanism |
Who This Is For
Sailors and boat builders requiring high-performance, reliable blocks for frequently adjusted, highly loaded systems, especially those using modern, smaller diameter lines. Ideal for performance cruising and racing applications where durability and efficiency under stress are paramount.
How It Compares
| Feature | Lewmar 72mm HTX Single Block | Competitor |
|---|---|---|
| Sheave Diameter | 72mm | — |
| Working Load Limit (WLL) | 4405lb | 3000lb, 2698lb |
| Weight | 15.6oz | 10.6oz, 6.7oz |
| Max Line Size | 0.55" (14mm) | 1/2" (13mm), 7/16" |
| Bearing Type | Plain central bearing, Delrin ball bearings for side thrust | Carbo-Tite bearing, Orbit bearing |
| Head Type | Grub screw swivel head locking mechanism | Swiveling head with locking pin, Swiveling head with locking pin |
Common Concerns Answered
Are there common issues with Lewmar HTX blocks?
While specific complaints for this model are not generally found, standard maintenance is key. Occasional stiffness can occur if blocks are not properly cleaned and lubricated. The grub screw, while a secure locking feature, requires proper tightening to prevent loosening over time.
Is the price justified for the Lewmar 72mm HTX Block?
The price reflects the premium materials and engineering for high-load applications. For serious sailors and boat builders, the long-term durability, efficiency, and reliability under stress make this block a worthwhile investment compared to lower-specification alternatives.
How difficult is it to install this block?
Installation difficulty is rated 2/5. It requires basic mechanical skills for attaching the block to a line and integrating it into existing rigging. Ensuring secure attachment points and managing line tension are critical steps.
Frequently Asked Questions
What is the working load limit of the Lewmar 72mm HTX Block - Single?
The working load limit (WLL) for the Lewmar 72mm HTX Block - Single is 4405lb.
What is the maximum line size this block can accommodate?
This block is designed to accommodate a maximum line size of 0.55 inches (14mm).
What materials are used in the construction of the Lewmar HTX block?
The Lewmar 72mm HTX block features robust aluminum side cheeks, a plain central bearing, and Delrin ball bearings for side thrust.
What is the weight of the Lewmar 72mm HTX Block - Single?
The Lewmar 72mm HTX Block - Single weighs 15.6 ounces.
What is the purpose of the Delrin ball bearings in this block?
The Delrin ball bearings are incorporated to manage side thrust, ensuring smooth operation and reducing friction when the load is not perfectly aligned with the block's axis.
