[R-390] Holy terror

[Curt Nixon]

If you can, get a starter hole as large as possible.  Then fashion a 
handle from duct tape onto a fine hacksaw blade in the cut-on-pull 
direction and use that to saw into the corners.  Slow but only a few custs.

Also, if you are working in steel, place a couple of strong magnets near 
the chip fallout area to minimize the intrusion of chips. 

Or..find someone with a Bridgeport mill and do it that way.

THere are some pretty nice small, air-powered saws and filers around but 
expensive for just a couple of holes.  Look at airframe maintenance 
tools to get an idea of what is available.

FWIW

Curt
KU8L



Rasputin Novgorod wrote:
> I have to put several holes, round and rectangular in
> an old chassis about inch size. I do have two chassis
> punches, but the wrong sizes. In the past I've tried
> drawing the hole onto the metal, then drilling, filing
> and power jigsawing to the lines. 
>
> I also have a dremol tool.
>
> Any suggestions about doing this? It's a populated chassis
> and I don't really want to spray steel filings and chips
> all over it; nor do I want to have to dissassemble
> too much.
>
> Perhaps some kind of compact, powerful nibbler?
>
>
> Sincerely
> /b
>
>
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>