It is very straight forward to me. I'd find a machine shop that
understands. The pushrod tube has is hollow and the end of the pushrod has
a being surface which extends inside the hollow push rod. The machinist
simply cuts off as much material as required to shorten the rod to the wall
thickness of the hollow tubing. Then the end is compressed until the
shoulder of the tip contacts the end of the tube again.
Darwin Brown
-----Original Message-----
From: Malcolm Walker <walker05@camosun.bc.ca>
To: James H. Davis, Jr. <jhdavis@fiac.net>
Cc: triumphs@autox.team.net <triumphs@autox.team.net>
Date: Saturday, July 25, 1998 7:40 PM
Subject: Re: TR6 tubular push rods
>
>On Sat, 25 Jul 1998, James H. Davis, Jr. wrote:
>
>> No machine shop to which I took the pushrods (with the comp. manual)
could
>> figure out what the hell this explanation meant, or how to accomplish
this
>> shortening feat. Anyone actually have this procedure completed? If so,
how?
>
>...see below...
>
>> > >From Kastner's Competition Preparation Manual on shortening push rods
>> > --- "this shortening can be easily done in a lathe with a cut off tool.
>> > The end of the push rod is not removed for this shortening work. The
>> > cut off tool is ground the width that you wish removed from the length
>> > of the push rod and then the cut off tool is placed directly on the end
>> > of the tubing where the pressed steel ends meet the steel tube. This
>> > tubing is then cut down to the steel insert end and the insert end
>> > pressed down to the steel tubing again."
>
>Say you want to remove 1/8 of an inch. You would therefore use a piece of
>1/8" thick tool steel to fabricate the cutting tool that would actually do
>the.
>
>Align the tool in the lathe so that it's just cutting off the pushrod
>below the steel insert. (only taking 1/8 off!)
>
>Cut the pushrod to sever it but stop before the tool reaches the insert.
>The cut should be perpendicular to the pushrod shaft.
>
>Remove from lathe and press insert into shaft of pushrod. Total length
>should be 1/8" less.
>
>Substitute number of choice for 1/8"
>
>(Sometimes I think these guys play dumb because they just don't want to do
>it for ya... I have to trouble following the Kastner theory)
>
>With a bit of luck you could probably do this by hand with a hacksaw. I
>do NOT recommend such a practice.
>
>-Malcolm
>
>
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