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Lee,
For the round holes, I'd use a sharp drill bit at medium speed and go
slow. For the cleanest hole, start with a small one about 1/8" and move
up in small steps until you get the size you want. If you have a
stepped drill bit like a unibit, it should work great. One with smaller
steps will give the cleanest opening. Here is a sample:
https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html
or with Coupon 18288307 it drops to $13.99
https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html?ccdenc=eyJjb2RlIjoiMTgyODgzMDciLCJza3UiOiI5NjI3NSIsImlzIjoiMTMuOTkiLCJwcm9kdWN0X2lk%0D%0AIjoiMzQ0NiJ9%0D%0A&cid=newgetcpns090120
For the rectangle hole, if in metal, use a nibbler like
https://www.amazon.com/RadioShack-RadioShack%C2%AE-HT-204-Nibbling-Tool/dp/B007Z7PY48/
Drill a round hole first then trim it to size. I have not tried the
nibbler on plastic. I'd expect it to crack.
I've also used a small cutoff wheel in a Dremel at slow speed. It will
cut/melt plastic, so go a little small then clean it up with a file.
Drill small corner holes for the neatest opening.
Depending on the wire holes and if things are moving around, you may
want to look at a strain relief grommet. Another option is to use some
ring connectors for the incoming wires and screw them to the standoff
mounts inside the box then run a connecting wire to the next step so
there is no strain on the switch or other components.
Good luck,
Brian
On 9/9/2020 12:51 PM, Lee Daniels wrote:
> I need to cut a couple of holes in a rather small electronic project box (This
> one: https://amz.run/3YjE ) - but I'm not sure how to make nice "pretty" holes
> in this. It has both a plastic and metal covers, either one works for me, but
> I'll have wires through the plastic side. How does one cut a nice hole in a
> box like this? Ideally I'll have round holes for wiring and at least one small
> rectangle for a switch. See photo. Any suggestions appreciated!
> - Lee
>
> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
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> Archive: http://www.team.net/pipermail/shop-talk http://autox.team.net/archive
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Lee,<br>
<br>
For the round holes, I'd use a sharp drill bit at medium speed and
go slow. For the cleanest hole, start with a small one about 1/8"
and move up in small steps until you get the size you want. If you
have a stepped drill bit like a unibit, it should work great. One
with smaller steps will give the cleanest opening. Here is a
sample:<br>
<br>
<a class="moz-txt-link-freetext"
href="https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html";>https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html</a><br>
or with Coupon 18288307 it drops to $13.99<br>
<a class="moz-txt-link-freetext"
href="https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html?ccdenc=eyJjb2RlIjoiMTgyODgzMDciLCJza3UiOiI5NjI3NSIsImlzIjoiMTMuOTkiLCJwcm9kdWN0X2lk%0D%0AIjoiMzQ0NiJ9%0D%0A&cid=newgetcpns090120";>https://www.harborfreight.com/2-piece-titanium-nitride-coated-high-speed-steel-step-drills-96275.html?ccdenc=eyJjb2RlIjoiMTgyODgzMDciLCJza3UiOiI5NjI3NSIsImlzIjoiMTMuOTkiLCJwcm9kdWN0X2lk%0D%0AIjoiMzQ0NiJ9%0D%0A&cid=newgetcpns090120</a><br>
<br>
For the rectangle hole, if in metal, use a nibbler like <br>
<a class="moz-txt-link-freetext"
href="https://www.amazon.com/RadioShack-RadioShack%C2%AE-HT-204-Nibbling-Tool/dp/B007Z7PY48/";>https://www.amazon.com/RadioShack-RadioShack%C2%AE-HT-204-Nibbling-Tool/dp/B007Z7PY48/</a><br>
Drill a round hole first then trim it to size. I have not tried the
nibbler on plastic. I'd expect it to crack.<br>
<br>
I've also used a small cutoff wheel in a Dremel at slow speed. It
will cut/melt plastic, so go a little small then clean it up with a
file. Drill small corner holes for the neatest opening.<br>
<br>
Depending on the wire holes and if things are moving around, you may
want to look at a strain relief grommet. Another option is to use
some ring connectors for the incoming wires and screw them to the
standoff mounts inside the box then run a connecting wire to the
next step so there is no strain on the switch or other components.<br>
<br>
Good luck,<br>
<br>
Brian<br>
<br>
<div class="moz-cite-prefix">On 9/9/2020 12:51 PM, Lee Daniels
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:022f9ff946a6505861089a2cd79bae32.squirrel@automate-it.com">
<pre class="moz-quote-pre" wrap="">I need to cut a couple of holes in a
rather small electronic project box (This
one: <a class="moz-txt-link-freetext"
href="https://amz.run/3YjE";>https://amz.run/3YjE</a> ) - but I'm not sure how
to make nice "pretty" holes
in this. It has both a plastic and metal covers, either one works for me, but
I'll have wires through the plastic side. How does one cut a nice hole in a
box like this? Ideally I'll have round holes for wiring and at least one small
rectangle for a switch. See photo. Any suggestions appreciated!
- Lee</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<pre class="moz-quote-pre"
wrap="">_______________________________________________
<a class="moz-txt-link-abbreviated"
href="mailto:Shop-talk@autox.team.net";>Shop-talk@autox.team.net</a>
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/shop-talk";>http://www.team.net/pipermail/shop-talk</a>
<a class="moz-txt-link-freetext"
href="http://autox.team.net/archive";>http://autox.team.net/archive</a>
</pre>
</blockquote>
<br>
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