Allen Brothers 30mm Dynamic Block – Fork (A2031F)
The Allen Brothers A2031F is a 30mm single Dynamic block fitted with a fork head attachment, built on the multi-function A2031 platform. Designed for secure mounting and reliable alignment under load, it delivers low-friction performance for control lines up to 8mm.
As part of the modular 30mm Dynamic range, this block combines versatility with dependable performance across a wide range of onboard systems.
Fork Head Attachment with Threaded Pin
The A2031F features a fork attachment accessory with a threaded pin, providing:
- Secure and reliable connection to deck fittings or rigging points
- Easy installation and removal
- Slight articulation to improve rope alignment under load
This makes it particularly well suited to fixed mounting positions where a stable mechanical connection is required, while still allowing the block to align naturally with the load.
Dynamic Bearing System for Smooth Operation
At the core of the A2031F is Allen’s patented Dynamic bearing system:
- Twin rows of stainless steel ball bearings
- Stainless steel bearing rail
- Acetal sheave
This configuration ensures smooth, low-friction sheave rotation, even under continuous adjustment. Compared to systems using plastic bearing races, the stainless-steel rail improves load handling and long-term durability.
Ideal applications include:
- Kicker / vang systems
- Cunningham and outhaul controls
- Traveller deflection points
- General control line management
Integrated Becket for Efficient System Design
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 useful in multi-part purchase systems where efficiency and simplicity are key.
A Versatile Fork Block within a Modular System
Built on the A2031 multi-function platform, the A2031F forms part of a wider, modular block system used across multiple configurations.
For sailors and riggers looking for a secure fork-mounted block that integrates seamlessly into more complex setups, it offers a reliable and adaptable solution within the Allen 30mm Dynamic range.
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