07-07-2023, 05:59 PM
I've just been speaking to a company https://www.vintageandclassicshockabsorbers.co.uk that rebuilds a variety of car dampers and learned something interesting about beech discs. The wood used is "steamed beech" - a drying process - sourced from Germany and the UK. The wood is of the highest quality and free from any defects. The discus used to be hand cut from planks and needed considerable work to get dead flat and with the right surface finish. Today, after several abortive attempts, they are made successfully on a CNC machine tool and only require a slight sanding on the edges to remove the sharpness. Oiling is done using a standard 140-grade car lubricant but in a pressure vessel. The discs are piled up on separators and left to soak, under pressure, for 24 hours. The pressure is then released with air, previously trapped within the grain of the wood, allowed to escape as bubbles. After repeating the process for another 24 hours and the discs are ready to use.
A7 discs are 3.25" in diameter and have a central hole of 1.5". The discs available from VCSA for the Harford Type 289 and 100 models are 3.125" in diameter and perhaps rather too thick, though they do have the correct 1.5" hole. https://www.vintageandclassicshockabsorb...tfordParts It might be that they would make one-off specials if you asked.
A7 discs are 3.25" in diameter and have a central hole of 1.5". The discs available from VCSA for the Harford Type 289 and 100 models are 3.125" in diameter and perhaps rather too thick, though they do have the correct 1.5" hole. https://www.vintageandclassicshockabsorb...tfordParts It might be that they would make one-off specials if you asked.