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Re: Broken Stud

To: tboicey@brit.ca
Subject: Re: Broken Stud
From: Eric Murray <ericm@lne.com>
Date: Thu, 20 Mar 1997 22:13:23 -0800 (PST)
Trevor Boicey writes:
> 
> Michael Leach wrote:
> > Pickup an ez-out kit from your local hardware supply if you don't
> > already have one.  Drill out the center of the broken bolt and use
> > ez-out to remove broken bolt.  It seems to work everytime.
> 
>   It does indeed work everytime, a very great tool.
> 
>   BUT.
> 
>   When the easy out breaks, you are REALLY done for. I broke

Easy-outs are made from very hard and brittle steel.
Even a little sideways pressure on the smaller ones
and they'll snap.  

You can (if you're lucky) grind out a broken easy-out with
tungsten-carbide tools.  If you're not lucky it's EDM time.

I have also used a type of extractor made by Rigid which uses rods
with sharp splines on the outside.  You drill a specific-sized
hole in the bolt, then tap the rod in, then slide a collar over
the rod that engages with the splines and has a hex on the outside
so you can turn it.  These are great because the rods aren't nearly
as hard as easy-outs so they don't break (they'll bend first).
Also they get a lot of contact inside the hole, for better grip
on the bolt.

The only problem is that I don't know where to get them; I have used a set
belonging to a friend who used to be a car mechanic but I haven't
seen any of them for sale.

-- 
   Eric Murray  ericm@lne.com  Network security and encryption consulting.
PGP keyid:E03F65E5 fingerprint:50 B0 A2 4C 7D 86 FC 03  92 E8 AC E6 7E 27 29 AF

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