I've never tried one on a powdered coated panel but chassis or knockout
punches would probably give you much better results than a hole saw.
They're more expensive but it might be worth it. They give a really clean
hole. Here's one source:

http://www.mcmaster.com/

Type "knockout punches" into the search box.

Grainger has them too but eBay might be your best shot for a good deal. For
example:

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2564990672

http://cgi.ebay.com/ws/eBayISAPI.dll...tem=2564995537

You need to know how thick the panel is and what it's made of before you buy
any though. There are a couple of different styles for different
thicknesses of panels.

Best Regards,
Keith Marshall


"I'm not grown up enough to be so old!"


"Alan Kamrowski II" wrote in message
...
Hi,

I am going to need to drill a 2 1/4" and 10 or so 1 1/8" holes in a metal
control panel (for an arcade game). I'm not sure how thick the control
panel is, but I wouldn't think thicker than 1/8". My understanding that
it
will arrive to me "powder coated" which I'm not sure will complicate
things
or not. I have a drill press and plan (so far) to drill using a lenox
bimetal hole saw. I plan to put some wood behind the control panel while
drilling it.

I saw people mention coolant on other drilling posts, do I need to be
concerned about this?

What RPM should I drill at?

Any tips or other ideas?

Thanks,

Alan