Re: [CR]Do-it-yourself guide to cutting a steering tube


Example: Framebuilding:Tubing:Falck
From: "John Pergolizzi" <jtperry@worldnet.att.net>
To: <OROBOYZ@aol.com>, <jerrymoos@sbcglobal.net>, <classicrendezvous@bikelist.org>
References: <69.3a165449.2c38c032@aol.com>
Subject: Re: [CR]Do-it-yourself guide to cutting a steering tube
Date: Sat, 5 Jul 2003 20:42:34 -0400


Group, I would like to add alittle to Dale's fine instructions:

---"start" the hacksaw cutting by using the file edge to "mark" on the waste
side of the indelible pen mark so the hacksaw does not wander around. This
is a small differance: cutting on which side of the pen mark or down the
middle of it . But it does make a differance, so be aware of it. File not
too deep, but just enough so the blade is "in the groove".
Also, if your a "rightie", then use your left thumb as the "guide" for
the file and the hacksaw. The loss of some thumbnail will give you the mark
of the professional needed to join the club. (Huh, what club?) Lefties,
your on your own.
And put the blade into the saw the RIGHT way. Hacksaw blades cut on the
PULL or PUSH stroke. I like to use u'm , cutting on the push stroke( teeth
point away from the handle). That's right for me. But whichever you
prefer, just be aware of it. New blades are marked, so you can't mess up
(the teeth do go in a certain direction. LOOK close).
A few weeks ago I choped 3/8 of an inch off of my Rivendell uper
headlug (the early ones, 1997, can "hack" this) so as to get the stem lower
and into the right position for me. Came out fine. Talk about "relax
first".
ciao,
G.T.Pergolizzi
New York


----- Original Message -----
From: OROBOYZ@aol.com
To: jerrymoos@sbcglobal.net
Sent: Saturday, July 05, 2003 7:58 PM
Subject: [CR]Do-it-yourself guide to cutting a steering tube



> In a message dated 7/5/2003 10:49:10 AM Eastern Daylight Time,
> jerrymoos@sbcglobal.net writes:
>
> <<
> Of course, one can take the crude approach and just attack the thing with a
> hacksaw, but I'm thinking many on the list may have some techniques and
> tricks to share for getting an even cut, avoiding damage to the steerer
> threads, and getting the length just right. Any suggestions would be
> appreciated. >>
>
> Well, the most important starting point is that last comment you made.. i.e.,
> getting the steerer cut to the correct length.
>
> The safest approach is to completely assemble the head set in the frame and
> then mark the steerer tube with an indelible pen...You will have to carefully
> measure the cap nut. Also measure & write down all the needed dimensions, so
> you can double check yourself. Better to add a few mms and have to add a washer
> than end up too short (disaster!)
>
> Once you are happy with the amount to be cut off, run the top adjustable cup
> all the way down past the cut area, as far down as it will go toward the fork
> crown. A junk headset part can be used but even the good one is fine if you
> are careful.. (Maybe it WOULD be best if this part is steel rather than
> aluminum.)
>
> As far as the actual hack saw cutting goes, I do not think a guide tool is
> necessary at all. I prefer not to use one in CDO and we have a bunch of them..
> Clamp the steerer horizontally in your vise (brass or plastic soft jaws are
> always a good idea.) Start the cut at your mark, remembering that the saw cut is
> the width of the blade so maybe be on the "high side" of your mark...
> Here are important tips:
> 1. Do not try to cut completely straight through the fork steerer in that
> position, but instead rotate the fork around after you have made perhaps about a
> 1/8th of the cut, this will mean rotating the fork a bunch of times but you
> have plenty of time, right? This will allow you to accurately follow your guides
> and not "drift" off and get an out of square cut...
> 2. Use the hack saw properly, i.e., do not use a seesaw, back and forth
> cutting action but cut only on the forward stroke. Try to not force it but let the
> nice sharp(!) saw blade do the cutting. Relax and soften up on the back
> stroke... It will make a difference.
>
> Once the fork steerer is cut through, use a flat file to shape the end by
> filing at an approximately 45 degree and to the steerer. Do not remove a lot of
> material but enough to make a clean effect and transition into the threads. A
> medium to fine round file can be used to de-burr the interior. BTW, an actual
> de-burring tool is handy here and a nice cheap addition to your tool kit!
>
> Once the end is cleaned up, the threaded race can be removed, it will clean
> the residual gorp out of the steerer threads as it comes off.
>
> A final cleaning on the bench grinder with a fine wire brush installed will
> polish the threads and make the fork ready to be assembled.....
>
>
> Dale Brown
> cycles de ORO, Inc.
> 1410 Mill Street
> Greensboro, North Carolina 27408
> 336-274-5959
> fax 336-274-6360
> <A HREF="http://www.cyclesdeoro.com">cyclesdeORO.com</A>
> <A HREF="http://www.classicrendezvous.com./main.htm">ClassicRendezvous.com</A>