From: Sonny Heath (sonny@defuniak.com)
Date: Fri Nov 18 2005 - 05:24:53 PST
Good advice, Thanks Buzz,
Sonny
----- Original Message -----
From: "Buzz" <muttman@charter.net>
To: "Sonny Heath" <sonny@defuniak.com>
Cc: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Thursday, November 17, 2005 11:26 PM
Subject: [BULK] Re: [MV] [Norton AntiSpam] Re: [MV] inverted "easy
out".......
Listers,
To remove broken bolts on old equipment I assume that the bolt is rusted and
that's why it broke. Especially head bolts, or studs, that go into the
water
jacket. I don't like using heat because that plays havoc with the temper of
the
metal. I've never had much luck welding on nuts because I couldn't get the
proper penetration. Speaking of penetration, penetrating oil will break the
surface rust bond, but after a week it only penetrated a few threads. If I
can
get the bolt or nut to move a little then I add more penetrating oil and
work it
in and out a little at a time until it comes off.
Back to the original problem.... get the drill. If the part is broken off
below
the surface I use the proper size transfer punch to punch it exactly in the
center, then follow up with a regular center punch. I usually start with a
center drill, then a SHARP 1/8" drill. I use enough force to remove material
but
not so much that I bend the drill. If too much force is used the drill will
bend and go off center.
I then start using left hand drills 1/16" at a time, up to just below the
tap
hole size. If the piece is still in the threads then I tap the hole.
Usually
what happens is that as I approach the size of the broken piece it'll spin
out
of the hole.
Forget about eze-outs they just break, then your in REAL trouble. The only
time
that I've had good results with eze-outs is if the bolt was new and broke
from
over tightening, or was sheared off. If I use eze-outs I like the square
ones.
The left hand threaded ones seem to swell the bolt then it is tighter.
Buzz
BTW buy a GOOD set of drills because if you come up against a class 8 bolt
you're gonna need a good drill.
On Thu, 17 Nov 2005 13:31:35 -0600, you wrote:
>
>What would you do when you have one like the one being discussed that is
>broken off up in the threaded hole?
>
>Sonny
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