more fun with TORX fasteners

more fun with TORX fasteners

Post by Chris Kantarji » Thu, 23 Apr 1998 04:00:00



Well, I bought some new TORX bits (made by Lisle). I went out to
the garage and applied my brand new T10 driver to the little M3
bolt in the turbocharger I'm trying to take apart, and the
bit stripped, the***head stripped, and now I'm stuck.

Does anyone make***extractors this small? I have a replacement
screw, so I know it's M3x0.50; I'm thinking I could drill through
with a tap size drill (it's #32 or thereabouts, I think) or slightly
undersized, and then try to remove the remains with a tap. Slowly.

Any other ideas? I don't know if the hole is blind or not, but since
a blind hole will make the task more difficult, it probably is.

 
 
 

more fun with TORX fasteners

Post by ddoug.. » Thu, 23 Apr 1998 04:00:00


I like to use a left-handed drill in a case like this.  As the drill
goes in, it heats up the***and the hole releives some of the
pressure holding the***in.  If the Gods smile on you, the left-hand
drill will grab and the***comes right out under power. Good luck,
Doug


 
 
 

more fun with TORX fasteners

Post by SLEYK » Thu, 23 Apr 1998 04:00:00



Quote:
Kantarjiev) writes:
>Well, I bought some new TORX bits (made by Lisle). I went out to
>the garage and applied my brand new T10 driver to the little M3
>bolt in the turbocharger I'm trying to take apart, and the
>bit stripped, the***head stripped, and now I'm stuck.

I have had good luck using a hand impact driver on things like this.  Even with
the head stripped out you can usually get the driver to grab and break it free.
 Never broken a***this way and pulled out some really stripped heads.  Also
might try slotting the***head with a dremel and using a flat blade in the
impact driver.  They make impact drivers that take the same bits you use in a
cordless drilldriver and these bits are usually really tough.  Of course if it
is something you can't bring yourself to whack a few times ... never mind :)

Glenn Neff
Medford OR
Learnin to Turn

 
 
 

more fun with TORX fasteners

Post by Kelley Masch » Thu, 23 Apr 1998 04:00:00


You could put a hex nut on top of the M3 head and hit it with
the Mig welder.

Kelley

Quote:

>Well, I bought some new TORX bits (made by Lisle). I went out to
>the garage and applied my brand new T10 driver to the little M3
>bolt in the turbocharger I'm trying to take apart, and the
>bit stripped, the***head stripped, and now I'm stuck.
>Does anyone make***extractors this small? I have a replacement
>screw, so I know it's M3x0.50; I'm thinking I could drill through
>with a tap size drill (it's #32 or thereabouts, I think) or slightly
>undersized, and then try to remove the remains with a tap. Slowly.
>Any other ideas? I don't know if the hole is blind or not, but since
>a blind hole will make the task more difficult, it probably is.

--
Kelley Mascher                                            (206) 528-2713

Audiology Research                              Seattle, Washington USA
 
 
 

more fun with TORX fasteners

Post by Chris Kantarji » Thu, 23 Apr 1998 04:00:00


        I like to use a left-handed drill in a case like this.

I do, too. But I don't know where to find a left handed #32... do you?

 
 
 

more fun with TORX fasteners

Post by kenneth knael » Thu, 23 Apr 1998 04:00:00


Quote:

>Well, I bought some new TORX bits (made by Lisle). I went out to
>the garage and applied my brand new T10 driver to the little M3
>bolt in the turbocharger I'm trying to take apart, and the
>bit stripped, the***head stripped, and now I'm stuck.

>Does anyone make***extractors this small? I have a replacement
>screw, so I know it's M3x0.50; I'm thinking I could drill through
>with a tap size drill (it's #32 or thereabouts, I think) or slightly
>undersized, and then try to remove the remains with a tap. Slowly.

>Any other ideas? I don't know if the hole is blind or not, but since
>a blind hole will make the task more difficult, it probably is.

Chris,
I'm no expert at this.  Thank heaven I have not had to be.  However the last
word in removing broken taps and studs is by using EDM.  You might have to
pay a shop to do this but it might not be too expensive and might be the
best way.
Ken Knaell
Silver Spring, MD
 
 
 

more fun with TORX fasteners

Post by ddoug.. » Fri, 24 Apr 1998 04:00:00


Quote:

>         I like to use a left-handed drill in a case like this.

> I do, too. But I don't know where to find a left handed #32... do you?

Sure try MSC Page 106. They have left hand drills down to .0019" dia.
Doug
 
 
 

more fun with TORX fasteners

Post by PLAlbrec » Fri, 24 Apr 1998 04:00:00


Second the EDM idea. For all the effort and frustration and potential damage of
trying to un*** the thing, EDM is quick, painless, clean, and not that
expensive.

Pete

 
 
 

more fun with TORX fasteners

Post by Chris Kantarji » Fri, 24 Apr 1998 04:00:00


Thanks. I've used EDM before. I'll probably try a left handed #38 drill bit
and then go the EDM route.

 
 
 

more fun with TORX fasteners

Post by Chris Stratto » Fri, 24 Apr 1998 04:00:00


Quote:


> >         I like to use a left-handed drill in a case like this.

> > I do, too. But I don't know where to find a left handed #32... do you?

> Sure try MSC Page 106. They have left hand drills down to .0019" dia.
> Doug

Now all ya got to do is figure out how to get the drillpress motor
to start backwards!

(hmm, wrap a string around the spindle, yank, and flip the switch?
might work, but wrapping things around spindles is asking for trouble!)

--
Christopher C. Stratton
Engineer, Hornist, and Brass Instrument Maker
http://www.mdc.net/~stratton  or  http://bounce.to/stratton
SPAM BLOCKING in effect, fix email to stratton-at-netway-dot-com

                                        BBN Technologies
344 Boston Avenue                       733 Concord Ave 18/1D
Medford, MA 02155                       Cambridge, MA 02138
(781) 393-0034 evenings                 (617) 873-4773 days

 
 
 

more fun with TORX fasteners

Post by Chris Kantarji » Fri, 24 Apr 1998 04:00:00


        Now all ya got to do is figure out how to get the drillpress motor
        to start backwards!

It's easy when your drill press is really a milling machine.

 
 
 

more fun with TORX fasteners

Post by Harold Baldin » Fri, 01 May 1998 04:00:00


I've had VERY good luck removing broken/stripped
fasteners (works even if its broken off below the
surface):

Make a strap that has a hole in one end of it.  The
hole should be of clearance size for the fastener
(slightly smaller if the fastener is below the
surface).

Place hole in the strap over the fastener.  Attach
ground clamp to the strap.  Turn up the voltage on the
MIG welder, center the wire over the fastener and ZAP
it (makes a nice "spot weld").

You have just done two things:  1) applied a tremendous
amount of energy (heat) to the offending threads
without disturbing the surrounding material;  2)
replaced stripped/missing head with a nice handle with
which you can now unthread the fastener.

Harold Balding

Quote:

> Well, I bought some new TORX bits (made by Lisle). I went out to
> the garage and applied my brand new T10 driver to the little M3
> bolt in the turbocharger I'm trying to take apart, and the
> bit stripped, the***head stripped, and now I'm stuck.

> Does anyone make***extractors this small? I have a replacement
> screw, so I know it's M3x0.50; I'm thinking I could drill through
> with a tap size drill (it's #32 or thereabouts, I think) or slightly
> undersized, and then try to remove the remains with a tap. Slowly.

> Any other ideas? I don't know if the hole is blind or not, but since
> a blind hole will make the task more difficult, it probably is.