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Old Sep 13, 2004, 05:11 PM
Zenin
Guest
n/a Posts
Screw Removal: 4-40 screws are too small for any easy-out! :-(

I had the head of a small 4-40 screw shear clean off with the body inside an
aluminum part. None of the easy-out screw removers I have are even close to
small enough to take this out and I don't see any at the hardware or model
stores around my area that are any smaller. The hole is not reachable from
the other side. And to help things out even more the screw was put in with
thread lock.

Does anyone make super-tiny screw extractors? Is there some other method
of taking out small broken screws?

Thanks!
Old Sep 13, 2004, 05:11 PM
Dean
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

On Mon, 13 Sep 2004 19:51:48 -0000, Zenin <zenin@rhps.org> wrote:

>I had the head of a small 4-40 screw shear clean off with the body inside an
>aluminum part. None of the easy-out screw removers I have are even close to
>small enough to take this out and I don't see any at the hardware or model
>stores around my area that are any smaller. The hole is not reachable from
>the other side. And to help things out even more the screw was put in with
>thread lock.
>
>Does anyone make super-tiny screw extractors? Is there some other method
>of taking out small broken screws?
>
>Thanks!


Pretty much your only hope is to cut a slot in it with a dremel cutoff wheel
(the thinnest you can find). You will end up slotting the part a little too.
But otherwise you are gonna have to scrap it, not much you can do.
---
Proud owner of:
Associated RC10GT <the other basher>
Team Losi XX "CR" <the basher>
Team Losi XXX KE <the racer>
http://ripperd.com
email: dean (at) the above domain
Old Sep 13, 2004, 07:11 PM
Johnboy
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

A way that works for me is to use a left handed drill bit from
McMaster.
Set the drill motor to reverse and carefully get the drill bit started
in the center of the 4 - 40, then apply pressure as normal. The heat
and
the constant torque usually gets it out.

"Zenin" <zenin@rhps.org> wrote in message
news:10kbuikfshj0uc1@news.supernews.com...
> I had the head of a small 4-40 screw shear clean off with the body

inside an
> aluminum part. None of the easy-out screw removers I have are even

close to
> small enough to take this out and I don't see any at the hardware or

model
> stores around my area that are any smaller. The hole is not

reachable from
> the other side. And to help things out even more the screw was put

in with
> thread lock.
>
> Does anyone make super-tiny screw extractors? Is there some other

method
> of taking out small broken screws?
>
> Thanks!




Old Sep 13, 2004, 09:11 PM
Divrdan007
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

>Subject: Screw Removal: 4-40 screws are too small for any easy-out! :-(
>From: Zenin zenin@rhps.org


> Is there some other method
>of taking out small broken screws?
>


I have taken my dremel cutting wheel, and cut a slot in there, then used a
jeweler's screwdriver to remove the screw.
You will damage the surface of the part, but since it's aluminum, it shouldn't
matter.
The other alternative is to drill it out, and tap new threads.
Good Luck

Old Sep 14, 2004, 05:12 AM
Zenin
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

Johnboy <jondne@knology.net> wrote:
> A way that works for me is to use a left handed drill bit from McMaster.
> Set the drill motor to reverse and carefully get the drill bit started in
> the center of the 4 - 40, then apply pressure as normal. The heat and the
> constant torque usually gets it out.


I'll give this a shot I think; I hadn't know of left handed drill bits.
Thanks!

The other ideas posted about cutting a slot in it might have worked
except since the treads start almost a 1/4" down the hole that's where
it broke off... I'd have to cut really deap into the part to get to it.
Duh. :-(

-Zenin
Old Sep 14, 2004, 01:11 PM
George Williams
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

Zenin wrote:
>
> Johnboy <jondne@knology.net> wrote:
> > A way that works for me is to use a left handed drill bit from McMaster.
> > Set the drill motor to reverse and carefully get the drill bit started in
> > the center of the 4 - 40, then apply pressure as normal. The heat and the
> > constant torque usually gets it out.

>
> I'll give this a shot I think; I hadn't know of left handed drill bits.
> Thanks!
>
> The other ideas posted about cutting a slot in it might have worked
> except since the treads start almost a 1/4" down the hole that's where
> it broke off... I'd have to cut really deap into the part to get to it.
> Duh. :-(


Soak it in acetone or methyl ethyl ketone (MEK) to loosen it up first.
Don't try drilling out (right-hand bit, forward) if the screw metal is
steel, as the bit will deflect into the aluminium and break off. I hope
the left-hand bit (or screw extractor bit) works, although I haven't the
foggiest where one would acquire a left-hand bit.
Old Sep 14, 2004, 03:11 PM
Johnboy
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

Since the broken screw is down in a hole, you can get a
piece of brass tubing from a hobby shop to use as a drill guide.
Cut a piece that fits into the hole and leave about .25 - .50
sticking out. Once you have a pilot hole started, you can remove
the brass and change to a slightly bigger bit to hopefully remove
the broken screw. This brass piece will guide the bit towards the
center of the screw.

"Zenin" <zenin@rhps.org> wrote in message
news:10kd8k2blgl561b@news.supernews.com...
> Johnboy <jondne@knology.net> wrote:
> > A way that works for me is to use a left handed drill bit from

McMaster.
> > Set the drill motor to reverse and carefully get the drill bit

started in
> > the center of the 4 - 40, then apply pressure as normal. The heat

and the
> > constant torque usually gets it out.

>
> I'll give this a shot I think; I hadn't know of left handed

drill bits.
> Thanks!
>
> The other ideas posted about cutting a slot in it might have

worked
> except since the treads start almost a 1/4" down the hole that's

where
> it broke off... I'd have to cut really deap into the part to get

to it.
> Duh. :-(
>
> -Zenin




Old Sep 14, 2004, 06:13 PM
Registered User
Leesburg, VA
Joined Aug 2004
26 Posts
Found these, not cheap though.

http://www.aldn.com/mdrillout/
davemartin88 is offline Find More Posts by davemartin88
Old Sep 14, 2004, 11:11 PM
Robert Gross
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

I also found these, again not cheap.

http://www.sears.com/sr/javasr/produ...id=00952158000

Robert

"davemartin88" <davemartin88.1clisf@rcgroups.com> wrote in message
news:davemartin88.1clisf@rcgroups.com...
>
> Found these, not cheap though.
>
> http://www.aldn.com/mdrillout/
>
>
> --
> davemartin88
> ------------------------------------------------------------------------
> davemartin88's Profile:

http://www.rcgroups.com/forums/membe...o&userid=37683
> View this thread:

http://www.rcgroups.com/forums/showt...hreadid=275097
>



Old Sep 15, 2004, 01:11 AM
walker
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(


"George Williams" <nyar1ath0tep@mac.com> wrote in message
news:41471E0B.E97259E9@mac.com...
> Zenin wrote:
> >
> > Johnboy <jondne@knology.net> wrote:
> > > A way that works for me is to use a left handed drill bit from

McMaster.
> > > Set the drill motor to reverse and carefully get the drill bit started

in
> > > the center of the 4 - 40, then apply pressure as normal. The heat and

the
> > > constant torque usually gets it out.

> >
> > I'll give this a shot I think; I hadn't know of left handed drill

bits.
> > Thanks!
> >
> > The other ideas posted about cutting a slot in it might have worked
> > except since the treads start almost a 1/4" down the hole that's

where
> > it broke off... I'd have to cut really deap into the part to get to

it.
> > Duh. :-(

>
> Soak it in acetone or methyl ethyl ketone (MEK) to loosen it up first.
> Don't try drilling out (right-hand bit, forward) if the screw metal is
> steel, as the bit will deflect into the aluminium and break off. I hope
> the left-hand bit (or screw extractor bit) works, although I haven't the
> foggiest where one would acquire a left-hand bit.


The poster mentioned McMaster's which is a huge tool and hardware
catalog. I had been unaware of it previously but I certainly won't forget
it. Amazing! They not only have left handed drill bits but several types and
SAE and metric.


Old Sep 15, 2004, 01:11 AM
George Williams
Guest
n/a Posts
Re: Screw Removal: 4-40 screws are too small for any easy-out! :-(

walker wrote:

> The poster mentioned McMaster's which is a huge tool and hardware
> catalog. I had been unaware of it previously but I certainly won't forget
> it. Amazing! They not only have left handed drill bits but several types and
> SAE and metric.


Yes, I finally spotted that. Quite a good resource.
 


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