Joining aluminium extrusion lengthways

[EddyCurrent]

You could give this type of stuff a go

Funny you should mention that, I posted something similar myself a few weeks ago, http://www.mycncuk.com/threads/8045-...3115#post63115 , but then forgot about it

[Solihull1]

Could you not drill a series of holes along the lengths of all the sections, counter bore all the holes on the outside two.
Insert threaded bars through the holes and tighten it all together with Nyloc locknuts.

[EddyCurrent]

Done. Holes drilled right through, 8mm rod with dome nuts at the end and captive channel nuts in the 45deg extrusion.
Counterbores to allow a socket to be placed over the dome nuts was cut on the cnc router, it cut it like butter.
I was going to put 6mm aluminium top on it but to keep cost down I found some spare 10mm waterproof melamine faced plywood.
Also after using supported rail for the first time I can safely say that even though it works great for this application I would not use it myself for building a cnc machine.

[mekanik]

Nice job Eddy, is that a Felder ?
Regards
Mike

[EddyCurrent]

Nice job Eddy, is that a Felder ?
Regards
Mike

Same company but slightly cheaper 'Hammer' brand.