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How to drill a 3/4" hole in metal? Walter R. 11-02-2008
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Posted by Walter R. on November 2, 2008, 8:04 pm
I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.

I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
It's a tedious job to drill a 1/2" hole and then use a file to enlarge it to
3/4".

Any easy way to do this without getting blisters?

Thanks

--
Walter
www.rationality.net
-



Posted by Sharp Dressed Man on November 2, 2008, 8:20 pm
>I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.
>
> I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
> It's a tedious job to drill a 1/2" hole and then use a file to enlarge it
> to 3/4".
>
> Any easy way to do this without getting blisters?
>
> Thanks
>
> --
> Walter
> www.rationality.net

3/4" drill with 3/8th shank?



Posted by on November 2, 2008, 8:21 pm
wrote:

>I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.
>
>I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
>It's a tedious job to drill a 1/2" hole and then use a file to enlarge it to
>3/4".
>
>Any easy way to do this without getting blisters?
>
>Thanks

Try a 3/4 inch drill with a 1/2 shank.

http://www.biscotoolsupply.com/home/bis/page_975_62/reduced_shank_drill_bits___shank_fractional_sizes_.html

Posted by Ralph Mowery on November 2, 2008, 8:25 pm
Buy a hole saw. They make bits that are large and have a shaft that matches
a 3/8 drill motor. Maybe a step bit if you can drill from both sides.

>I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.
>
> I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
> It's a tedious job to drill a 1/2" hole and then use a file to enlarge it
> to 3/4".
>
> Any easy way to do this without getting blisters?
>
> Thanks
>
> --
> Walter
> www.rationality.net
> -
>



Posted by John Grabowski on November 2, 2008, 8:27 pm

>I need to make (drill?) several 3/4" holes in 1/4" thick aluminum panels.
>
> I have a 3/8" drill, a 1/2" drill bit, a 4" angle grinder, and hand files.
> It's a tedious job to drill a 1/2" hole and then use a file to enlarge it
> to 3/4".
>
> Any easy way to do this without getting blisters?
>
> Thanks
>
> --
> Walter
> www.rationality.net
> -


Aluminum is not difficult to drill through. Use a hole saw or a unibit.
Take it slow.


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