I have a 3/32 CKWorldwide wedge collet (in a CKW gas lens) that will not
> hold the tungsten. It used to but now I can reef on the back cap and get
> the tungsten sort of tight but not really secure. In a few inches of weld,
> the tungsten is loose again.
>
> I switched the offending collet out for a new one and it holds. I wonder:
> do collets stop holding after some period of use? If so, what wears on
> them? Does the tungsten abrade the inside wall of the collet? Or, does the
> heat/cool cycle swell the collet?
>
> If my hypothesis about collets (they get bigger and thus 'wear out' through
> use) is correct, then I wonder if gas lenses wear out too.
>
> Ciao,
> David Todtman
>
>
Sounds like you just got a bad one. I have had this happen before. No big deal.