Can anyone help?
I have a beautifully restored Conti Empress that is destined to become a decoration because I cannot find an appropriate spring for it.
It was restored recently and a 6.8mm diameter coated steel spring was located and installed in it (marked as 7mm diameter on the website):- https://www.tse.at/shop/product_info/ca ... igung.html
It worked really well for a while but parts of the spring plating broke down, came loose and caused rubbing between the outside of the spring and the piston bore, which led to pitting of the bore. Obviously, that spring had to come out.
I had some custom stainless springs made but the closest we have in Australia in wire diameters is either 6.4mm or 7.1mm. I have tried both and (this is sounding like the 3 Bears here).... one was too soft and the other was too stiff. The length of the spring is governed by its unsprung length (in order to install it onto the piston rod) but really limited by the amount it needs to compress to in order to have the lever lock when in the 'down' position.
Who would have thought that such a small difference in wire diameter would have such a huge difference?!
We don't have stainless 6.8mm springmaking wire in Australia.
I am hoping that someone in another country will be able to tell me if they have 6.8mm diameter stainless wire available...hopefully with the outcome of having some springs made that I can use.