Re: [CR]Effects of countersinking drillium holes on structural strength

(Example: Events:BVVW)

Date: Sat, 02 Sep 2006 09:16:35 -0500
From: "John Thompson" <JohnThompson@new.rr.com>
Organization: The Crimson Permanent Assurance
To: classicrendezvous@bikelist.org
Subject: Re: [CR]Effects of countersinking drillium holes on structural strength
References: <003e01c6cdc6$51b06050$20f4d045@ts>
In-Reply-To: <003e01c6cdc6$51b06050$20f4d045@ts>


Tom Sanders wrote:
> Given the interest in Drillium and countersinking the holes in recent posts
> (sorry Sheldon) I have a question to pose to the list. Does countersinking
> drillium holes (they are probably only countersunk on the side viewed from
> anyway is my guess) add structural strength by eliminating a possible Stress
> riser around the circumference of the drilled hole, or does it decrease the
> strength by creating two smaller stress risers, or (and this is my guess)
> does it make no difference?

I suspect it's just cosmetic -- the countersunk holes look cooler. FWIW, the drillium Campy crank I mentioned in another message is countersunk on both sides.

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