16 Jul 2003, 11:24, Charles Angelich (1:106/2000), wrote to Matt Mc_carthy:

Hi Charles.

 MM>> I disagree strongly. If you study the design of the
 MM>> "EZ-Out" there is nothing there that will properly assist
 MM>> removing a broken screw, other than having a left-handed
 MM>> spiral. The taper  is excessive, and the spiral is
 MM>> smooth-fluted, nothing to bite into the broken part. The
 MM>> tighter it is turned, the more it forces the broken part to
 MM>> expand into the threaded hole. Because of the steep taper,
 MM>> the exposed end of the broken screw is rapidly expanded
 MM>> locking the screw into the threaded hole. That is _my_
 MM>> definition of 'worthless'. 

.......................

 CA> The shop where I served my apprenticeship was so very well
 CA> tooled up that you could imagine what tools you wanted to use
 CA> and then go get them from the toolroom. They not only had
 CA> everything they had them in multiple sizes and from multiple
 CA> manufacturers. It was one of the more successful Pattern shops
 CA> in Detroit and had been in business for 25 years before I got
 CA> there. The shop averaged 105 journeyman plus about a dozen
 CA> apprentices. They used EZ-Outs. 

Yep, straight from purchasing...

................................

 CA> Some of the metals used in shops that have these screws, bolts, 
 CA> and taps broken off in a hole will harden if they are heated
 CA> beyond a certain temperature. It would be a mistake to put an
 CA> Acetylene torch to them for _any_ reason. The E-Lox is water
 CA> cooled and only 'warms' the area a bit. You can put your hand

Where did I say NOT to cool the workpiece, regardless of what's being used?

 CA> I am a journeyman metal Patternmaker and have no doubts about
 CA> what works and what does not work when moving metal is the
 CA> desired goal. 

So I read almost daily Charles.

No real discussion is possible with that mindset so I'l end it here.


     Good luck...  M.

--- Msged/386 TE 06 (pre)