Jan wrote:

I have a slot (cut in the case of a fully assembled computer) about 90mm x
10mm. I need to extend the slot to about 94mm x 10mm.

Is there a tool that would do this cleanly, without making any metal filings
such as would be caused by a metal sawblade or drill bit?

If necessary, I could get away with making two 4mm-long slots at one end of
the existing hole, and just bending the metal between the two slots, instead
of cutting it away.

The clearance available for getting any tool into position is a 6mm wide
strip around the slot perimeter.

I want to avoid metal filings, so I can avoid having to take electrical
parts out of the computer case.



Possibly a pair of "notching" metal snips, like these:
http://www.heimerdingercutlery.com/c...KEN=2 3995945

I've used such a tool, but you need a good ratchet action pair to get
through the tough steel used in PC cases...
They will still leave metal swarf of course, but it tends to stay
"attached" until you break it off.

Lee
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