Subject: Re: Aluminum finishing on Lathe?

From: [email-masked] (Charles Lamont)
Date: Sat, 8 Apr 1995 07:13:54 +0000

I found it very surprising when I first saw computer disks being made 
(the ancient 10" jobs, for "washing machine" drives).

The aluminium substrate was rough ground and then finish turned, with
a diamond tool.             ^^^^^                 ^^^^^^

The result was **flat**.  The lathe was highly specialised though.

--
Charles Lamont