Re: [ATM] Cutting thread in aluminium

["A. Suijkerbuijk" <a.suykerbuyk@wxs.nl>]

With a little bit of drilling oil you should have no problem.

Regards,
Adrie Suijkerbuijk

----- Original Message ----- 
From: "Göran Hosinsky" <hosinsky@ya.com>
To: <>
Sent: Friday, March 04, 2005 7:07 PM
Subject: [ATM] Cutting thread in aluminium


> Is there any special trick to cutting threads in aluminium?
> I was cutting a M5 thread by hand in a 15 mm thick piece of
> aluminium, unknown type, when the tap (tap no 1 in a three
> tap set) sized up and broke. I was pouring alcohol over the
> cutting.
>
> At my second try, with a new tap, I managed to back out again
> when it began to stick. I then drilled up the hole to a bigger
> diameter and found to my surprise, that the drill had difficulties
> to go through the threaded part of the hole, it was like the
> aluminium had been hardened at that point.
>
> Any advice would be welcome as I have quite a few holes that
> I want to put thread in.
>
> Goran, La Palma
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> ATM mailing list http://www.atmlist.net/
> 


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