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- Newsgroups: sci.electronics
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- From: zben@ni.umd.edu (Charles B. Cranston)
- Subject: Re: A construction question about front panels for home-brew projects...
- Message-ID: <zben-210892220341@zben-mac-ii.umd.edu>
- Followup-To: sci.electronics
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- Organization: UM Home for the Terminally Analytical
- References: <1992Aug21.012025.13775@pony.Ingres.COM>
- Distribution: na
- Date: Sat, 22 Aug 1992 02:09:29 GMT
- Lines: 25
-
- In article <1992Aug21.012025.13775@pony.Ingres.COM>,
- bonobo@Ingres.COM (David Victor) wrote:
-
- > I'm trying to make a nice-looking aluminum front panel for a project,
- > and I'd like to be able to use rectangular switches, possibly other
- > squared-off displays, etc. How do you cut a perfectly-squared-off hole
- > in an aluminum panel? Is there some home-brew method I'm not aware of?
-
- The best way, of course, is to use a chassis punch. You drill a hole
- (within the final desired rectangle, of course) and thread through the
- screw. Then the screw tightens the knife part of the punch into the
- die part of the punch, and cuts the hole cleanly. The downside is the
- expense of the punch itself.
-
- The next cheapest way is to use a "nibbling tool", a hand-operated tool
- that "nibbles" rectangular chunks (about 1/4" by 1/10") each time you
- actuate the handle. You drill a hole, within the final rectangle, just
- big enough to get the nibbler's head in. Then you nibble out to "near"
- the rectangles boundary, and finish up with a metal file (though
- actually after a little practice you can get very precise at the border
- by "nibbling" less than a full "bite"). This is especially effective
- if you have a bezel to mount around the hole to hide the edges.
-
- I should probably invest in a DB-25 chassis punch, since it is really
- tedious making that odd shape with a nibbler...
-