Christmas Opening Hours
Please be advised that Allen Brothers will close at 15:00 on 20th December and reopen on 6th January.
Orders placed during this period will be processed upon our return.
Wishing you a Merry Christmas and a Happy New Year!
Shop by boat
Single Person Dinghy / Moth / Blocks / 40mm dynamic blocks
Allen 40mm dynamic blocks are made from high-strength, lightweight glass-loaded nylon and feature dynamic bearings. The result is a high-performance block range suitable for keelboats and dinghies.
Dynamic Bearings - Twin rows of stainless steel ball bearings running on a stainless steel rail provide superior rolling speeds and durability when compared to plastic alternatives.
Swivel Shackle Attachment - Double, triple, and quadruple sheave variations all come with a lockable swivel shackle attachment. The shackle can be locked in 90-degree orientations. Alternatively, remove the shackle lock and allow the block to rotate freely.
Adjustable Cleat Arms - Single, double and triple sheave options are available with aluminium ball-bearing cam cleats mounted via an adjustable 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.
Maximum Working Load - If exceeded the block may not perform as designed. Breaking Load - The load at which a major block failure is likely to occur.
| SKU | Title | breaking load kg | fixing hole centres mm | maximum line diameter mm | maximum working load kg | shackle pin mm | Length mm | Weight g | Price | |
|---|---|---|---|---|---|---|---|---|---|---|
 |
A2040Tii- | Single Tii-On | 800 | - | 10 | 180 | - | 58 | 34.5 | £38.96 |
 |
A2040XHL | Extreme High Load | 1500 | - | 8 | 650 | - | 54 | 71 | £186.41 |