Grouch wrote:

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.

What you need is a Hole Punch. these come in round and square shapes. they
consist of a sharp cutter and a Bolt tightner.


This is definitely the best option, if you have enough access to use
them and you can get them in the right shape.
Ain't cheap though

Lee
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