Allen Brothers 30mm Dynamic Double Block (A2032)
The Allen Brothers A2032 is a 30mm double Dynamic block, designed for low-friction, fast-running control line systems requiring multi-part purchase setups. With a maximum rope diameter of 8mm, it offers a lightweight and strong solution for dinghies and performance boats using smaller diameter lines.
As the double sheave version of the A2030 platform, it is ideal for systems where increased mechanical advantage is required without compromising efficiency.
Double Sheave Design for Purchase Systems
The A2032 features a twin sheave configuration, allowing it to be used in:
- Kicker / vang cascades
- Cunningham and outhaul systems
- Multi-part purchase setups
- Control systems requiring increased mechanical advantage
This makes it a core component in more complex rigging systems where load distribution and efficiency are critical.
Dynamic Bearing System for Smooth, Low-Friction Performance
Each sheave in the A2032 runs on Allen’s patented Dynamic bearing system:
- Twin rows of stainless steel ball bearings
- Stainless steel bearing rail
- Acetal sheaves
This configuration ensures smooth, low-friction operation across both sheaves, even under continuous adjustment. Compared to systems using plastic bearing races, the stainless-steel rail improves load handling and long-term durability.
Ultra-Strap Construction for Strength and Reliability
The A2032 features Allen’s patented Ultra-Strap, manufactured using a coining process to enhance strength and wear resistance.
This results in:
- A stronger, more durable stainless steel strap
- Improved reliability under load
- A rope-friendly profile suitable for modern rigging setups
Originally developed for rope attachment, the Ultra-Strap provides flexibility across a wide range of configurations.
Integrated Becket for Efficient Cascade Systems
The large central rivet acts as a rope-friendly becket, allowing:
- Direct line termination within the block
- Cleaner, more compact cascade systems
- Reduced need for additional fittings
This is particularly beneficial in multi-part purchase systems where simplicity and efficiency are key.
A Core Component for Multi-Part Control Systems
The A2032 builds on the proven Dynamic platform to provide a reliable double block solution for modern sailing systems.
For sailors designing efficient purchase systems with smooth, consistent performance, it offers a lightweight and dependable option that integrates seamlessly into the wider Allen 30mm Dynamic range.
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