Re: [CR]mystery 5-pin orphan arm

(Example: Framebuilding:Tubing)

Date: Tue, 15 Apr 2008 21:37:07 -0500
Organization: The Crimson Permanent Assurance
To: CLASSIC RENDEZVOUS <classicrendezvous@bikelist.org>
Subject: Re: [CR]mystery 5-pin orphan arm
References: <9fb8b4e40804150909o5f3f2fcau70f3bcc2fbafb12d@mail.gmail.com>
In-Reply-To: <9fb8b4e40804150909o5f3f2fcau70f3bcc2fbafb12d@mail.gmail.com>
From: "John Thompson" <johndthompson@gmail.com>


Joe Bunik wrote:
> Digging through a box of orphans at my LBS, came up with (what to me
> is) an unusual arm/ring. Wondering if anyone can help me identify this
> / or maybe have a matching NDS mate?!?
>
> It's a 5-pin (ala TA etc.) arm... "AERO [cold forged]":
> http://flickr.com/photos/66275745@N00/tags/duralumin/
>
> ... tapered 170 arm, 50.4 bcd. "Duralumin forged" is cast on the back.
> Ring itself is 46t, and differs from TA in having 5, rather than 6
> arms. Drilling for additional "inner" rings matches the TA diameter -
> although of course, they're not really compatible! :-)
>
> Oh, and the puller threading is 22mm (i.e. not TA). All in all a nice,
> weird, orphan crank. "Just what I was looking for..." ha, yeah!

Look Japanese to me; the markings are very much like Sakae Ringyo (SR).

--

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