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RE: left handed drill bit

To: "'Joe Curry'" <spitlist@gte.net>, John Knox <jknox@hcsd.iu5.org>
Subject: RE: left handed drill bit
From: Craig Smith <CraigS@iewc.com>
Date: Mon, 29 Nov 1999 09:47:11 -0600
And tighten each hole in the chuck with a key. Many people forget to use
each hole in a chuck when putting in a bit. A Jacobs chuck needs all holes
tightened to hold the bit securely. Since you are turning the bit in reverse
this is will loosen the chuck if not properly tight.


-----Original Message-----
From: Joe Curry [mailto:spitlist@gte.net]
Sent: Monday, November 29, 1999 9:28 AM
To: John Knox
Cc: spitlist
Subject: Re: left handed drill bit



One word of caution:  When using a left handed drill bit, make sure you
have a reversible drill and use it in Reverse!  It works much better
that way!  :)

Joe



John Knox wrote:
> 
> Northern tool used to sell them, haven't looked in awhile to see if they
> still
> do, and most places that carry tools will sell them.  They aren't as
> uncommon as
> you might think.  They work really well in this type of situation.  My
> father is
> a machinist, and I always got mine from him.  Just center punch the
> bolt, then
> drill out.  I second the advice on the easy outs,.  They work ok, but do
> not put
> any kind of a side load on them.  They snap super easy.  I've never
> tried the
> snap on style.  I actually had better luck with the super cheap Buffalo
> Tools
> brand easy out.  They were not as hardened, and seemed to take a side
> load
> better.  They are only good for one use though.  They get pretty
> deformed in the
> process of removal.
> 
> Can I also recomend driling a small pilot hole through the center of the
> bolt,
> and then going to a larger drill bit.  If you have a second person to
> keep
> checking the drill allignment you can often do a good job of drilling
> down the
> center.
> 
> As a last resort go to a size that will just eat out the threads.  THis
> has to
> be done with a pilot hole as the drill will walk off the bolt into the
> softer
> material around it.  Best done as the third hole in the series.  Use
> really
> sharp drill bits and go slow.
> 
> "Bowen, Patrick A RP2" wrote:
> 
> > Where do you find a left handed drill bit?
> >
> > Patrick Bowen
> >
> > -----Original Message-----
> > From: John & Tracy Knox [mailto:jknox@erie.net]
> > Sent: Sunday, November 28, 1999 11:45 PM
> > To: spitfires@autox.team.net; Patrick Bowen
> > Subject: Re: Busted manifold stud (continued)
> >
> > Might I also suggest a left hand drill bit when drilling the bolt
> out.  I've
> > found that the heat, friction, and the hole in the center will often
> times
> > pull the offending bolt out without then going to an easy out.  Works
> as
> > often as not.
> >
> > John Knox

-- 
"If you can't excel with talent, triumph with effort."
 -- Dave Weinbaum in National Enquirer

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