[hpsdr] Enclosure for Atlas - Cutting large holes

[Ray J]

How about a Dremel Rotary "tool" with assorted cutting/grinding wheels??

I will defiantly NOT be buying the db25 punch..  lol

Ray J



Graham Haddock wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Neal Campbell wrote:
>   
>> Is there an equivalent of chassis punches that allow db25 punchouts?
>>   
>>     
> Yes, Google search for   "Greenlee DB25 punch". Exactly what you want, 
> but you won't like the price.
>
> http://www.amazon.com/gp/offer-listing/B000ARDH62?ie=UTF8&condition=new&tag=msnshop-ce-mp-20&creative=380345&creativeASIN=B000ARDH62&linkCode=asm 
>
>
>
>   
>> How would the experts on this list recommend to do this?
>>   
>>     
> The following takes some skill, but if you have a drill press, some files,
> and a small vise, you can get some nice results.
>
>
> 1.) Scribe the outline of the hole you want onto the panel.
>
>
> 2a.) Using a small drill, about 1/8 inch in diameter, go around the 
> inside of
> the hole scribe line with a row of 1/8 inch holes that come very close 
> to the
> line, and each other, but don't touch the line or each other.  When you 
> have
> drilled such a ring of holes, knock out the center plug.  Then use the 
> files
> to dress the hole out to the scribe line.
>
> OR
>
> 2b.) If the hole outline is big enough to drill a 7/16 inch hole in the 
> middle,
> without touching the outline, and the panel is soft aluminum
> or thin steel, drill a 7/16 inch hole anywhere in the middle of the
> desired hole area, and then using an ADEL hand nibbling tool,
> nibble your way around the inside edge of the scribe line.  Dress
> the finished hole as required, particularly if you want rounded corners.
> (Google   "ADEL nibbling tool" for source.   $16 to 20 typical price.)
>
>
> If you have never done this before, I suggest that you practice on a scrap
> piece of sheet metal.  I would not try it without a drill press and 
> small vise.
> Protect the sheetmetal while working it, or you will need to refinish it 
> after
> forming the hole(s).
>
>
> You can buy a nice Sears or Harbor Freight drill press, a vise, and all 
> the other
> tools you will need, and still have enough money to take your wife
> out for a nice dinner  for the price of one Greenlee punch.
>
> --- Graham
>
> ==
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