On 05/09/2016 16:22, Mike Perkins wrote:
I'm trying to source a steel disk of 50mm or slightly greater where I
can weld a nut in the centre and retains an element of rigidity.

I'm currently using:

http://www.screwfix.com/p/deta-galva...ck-of-10/1946j


really its too large a diameter though not a serious issue but is too
thin where it distorts badly whilst welding a nut in the centre.

Are there any off-the-shelf sources I can obtain a couple of these that
are 2-3mm thick? I've run out of ideas!

How about sticking a 60mm hole saw through a bit of 3mm thick steel -
then just use the bit you cut out?


--
Cheers,

John.

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