Allen 40mm Dynamic Ball Bearing Blocks


40mm Single Block Becket Fiddle Swivel Hook Cleat


Allen 40mm Single Block Becket Fiddle Swivel Hook Cleat


40mm Single Block with Becket Fiddle Swivel Hook & Cleat

Made from high-strength, lightweight glass-loaded nylon and featuring Allen’s dynamic bearing technology for a high-performance block suitable for keelboats and dinghies.

40mm dynamic blocks are perfect for use on main, jib and spinnaker sheets on dinghies and keelboat control lines.

Bearings – Dynamic blocks feature Allen's patented bearing system which uses twin rows of stainless-steel ball bearings running on a stainless-steel rail. The ball bearings are caged for further friction reduction. These features provide a superior load-carrying ability and longevity when compared to other bearing systems.

Swivel Hook Head – Featuring a 360-degree swivelling hook for super easy attachment. Ideal for lightweight control systems where removal needs to be quick.

Becket – The 40mm range features a large central hole, which can be used as a becket (tying-off point). Specific becket variations are also available.

Fiddle – The fiddle sheave is a 20mm dynamic bearing sheave. This ensures that any purchase systems run as smoothly as possible. 

Cam Cleat – The AL-0077, small aluminium cam cleat, is mounted to an adjustable stainless steel arm. The arm can be adjusted to suit your sheeting angle by simply loosening the nut and bolt through the centre of the block, loosening the side plates and retightening everything at the required angle.


Part Description Length
Line Ø
Shackle Pin
Load kg
Max Work
Load Kg
AL-20401-BFH-77 Single with becket fiddle hook & AL-0077 cleat 153 6 4 540 80 171 £126.83 EACH






contact us

ProBoat Ltd
Burnham Business Park,
Burnham - on - Crouch,

Phone - +44 (0)1621-785455
E mail - info@proboat.co.uk



Although great care is taken to ensure the information in this website is accurate, all information is given for guidance only and is not contractual.
We reserve the right to alter specifications without notice. The purchaser is responsible for choosing the correct product for it's particular application.
All goods are supplied according to our conditions of sale.