re.Bolt/screw extractors (was Broken exhaust manifold studs)

Kneale Brownson knotnook at
Thu Mar 28 16:45:50 EST 2002

Reid Tool  < >  lists two types of screw/bolt/stud
extractors with a reverse or left-hand drill bit.  One is their "power
broken bolt extractor" available in 1/4, 5/16, 3/8 and 1/2-inch sizes for
$19 each or a set of all for $74,  aand a "micro power extractor" in metric
sizes M3, M4, M5 and M6 for $16 each or a set for $63, or a masterkit of
both extractors for $104.  Both are described as having a left-hand cutting
tip backed up with an extractor.  The first ones use a hand drill that can
go in reverse and the metric ones use a power drill that can
reverse.  There's no image on the website.

At 09:17 AM 03/28/2002 -0800, Fundsalo Racing wrote:

> > 2) If you can find one, us a reverse out(left hand)
> > drillbit.  Start with a
> > smaller size like 1/8' then graduate to larger size
> > 1/4".  This will
> > sometimes catch and extract the stud while you are
> > drilling so you won't
> > have to -
>Aya, this is the way to go. The heat, vibration and
>weakening of the stud by slowly removing it's guts
>(sounds ghastly - no?) is often enough for the stud to
>break loose from the piece and spin out under the
>torque of the drill & bit. Go slowly and use a
>low-power drill so if the bit jams in the stud the bit
>won't snap off ala 'easy-out'.
>Reverse-twist drill bits are hard to find. (!) Not
>Craftsman, BTDT.... If anyone knows of a nation-wide
>source or cheap mail-order source for reverse-twist
>drill bits please share the source(s) and cost with
>das list.
>-glen  "If we give up our freedom as the price of security, we will no
>longer be the great nation that we are"
>United States Supreme Court Associate Justice Ruth Bader Ginsburg as
>quoted by the Tucson Citizen
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