Re: [CR]Question about drilling and countersinking

(Example: Production Builders:Pogliaghi)

Date: Sat, 02 Sep 2006 09:00:34 -0500
From: "John Thompson" <JohnThompson@new.rr.com>
Organization: The Crimson Permanent Assurance
To: classicrendezvous@bikelist.org
Subject: Re: [CR]Question about drilling and countersinking
References: <20060901045418.42232.qmail@web60422.mail.yahoo.com> <d9e8b2410608312213k2d5e1b36pda5bdfa7e9c453cf@mail.gmail.com>
In-Reply-To:


nicholas harteau wrote:
> I'm would imagine that when drillium components were originally made,
> they were made not with a drill, but on a mill, along with most of the
> rest of the parts.

Factory drillium was probably made in that manner, although the charmingly wobbly drilling on many Zeus 2000 chain rings suggests this was not a universal practice:

http://www.os2.dhs.org/~john/zeus-drillium.jpeg

And FWIW, here's a drillium Campy crank done on a drill press after painstakingly indexing each hole position from each tooth, drilling and countersinking:

http://www.os2.dhs.org/~john/campy-drillium.jpeg

So it can be done...

--
John (john@os2.dhs.org)
Appleton WI USA