[TheForge] Broken tap

Fri Sep 27 14:18:04 2002

Yes,
But there are some caveats:
Size matters, for very small taps, obviously you cannot drill them. In that case we usually use a center punch and a hammer and "shatter" the remaining tap out of the hole. For larger ones, and on steam turbines they can be as large as 7" in diameter carbide bits worked. When they wouldn't, again depending on size and location, we would anneal the tap with a cutting torch tip and then drill. And last resort, if you had a good millwright, which usually did, they would burn them out them a cutting torch. Probably a challenging option for aluminum.
Ray
> 
> From: "Ralph Sproul" <[email protected]>
> Date: 2002/09/27 Fri AM 08:30:28 EDT
> To: <[email protected]>
> Subject: Re: [TheForge] Broken tap
> 
>         Ray,  Are you saying your drilling thru the broken taps?   with what
> kind of drill?
> 
> Ralph
> 
> 
> ----- Original Message -----
> From: <[email protected]>
> To: <[email protected]>
> Sent: Friday, September 27, 2002 7:44 AM
> Subject: Re: [TheForge] Broken tap
> 
> 
> > In my experience most broken tap removal that leaves you with a servicable
> hole, requires drilling. Even in large applications on steam turbine
> maintenance overhauls I used to collect all the EZ-outs, and other gadgets
> from the millwrights and have them use a tap size drill and tap out the
> remaining metal. Still a tricky operation, but then you aren't trying to
> extract the EZ-out.
> >
> > Ray
> > Cincinnati
> > >
> > > From: "Darrell" <[email protected]>
> > > Date: 2002/09/26 Thu PM 09:16:26 EDT
> > > To: <[email protected]>
> > > Subject: [TheForge] Broken tap
> > >
> > > How do you remove a broken tap from aluminum? I seem to recall that
> there is a
> > > chemical means to do this.
> > >
> > > Darrell
> > >
> > > http://www.machinemaster.com
> > >
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