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 Post subject: Damaged screw extractor
PostPosted: Mar Mon 30, 2020 7:05 pm 
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Joined: May Tue 30, 2006 4:46 pm
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Location: Santa Rosa, CA
In trying to repair an old used Icom transceiver, I found the previous owner had destroyed 2 M3 Phillips screws. The cavities were completely "reamed" and would not allow me to loosen them.

I looked for my screw extractor bits, but discovered they are too large for such a small screw (similar to 4-40 US). My solution was to drill a 3/32" hole in the Phillips cavity and force a Torx T8 bit into the undersized hole. This gave enough "bite" to remove the screw easily. Worked well with brass screws. Steel might be more difficult.

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ScrewExtractor.jpg
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Rich


Last edited by Rich, W3HWJ on Mar Mon 30, 2020 7:29 pm, edited 1 time in total.

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 Post subject: Re: Damaged screw extractor
PostPosted: Mar Mon 30, 2020 7:15 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Wayside, NJ Monmouth
Nice tip. Thanks Rich. Will record that in my shop Hints and kinks book.


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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Fri 03, 2020 9:57 pm 
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Location: N. Palm Bch, Fl.
Never thought of that. I always try a small vice grip with poor success most of the time. Just not enough screw head to get a good grip. It's in my Hints and Tricks book also.

Freeman


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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Mon 06, 2020 2:23 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Rochester NY USA
I have a few left-handed drill bits - once it digs in, it spins the stripped screw out. McMaster Carr caries them.

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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Mon 06, 2020 3:07 pm 
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Location: Wayside, NJ Monmouth
There is a joke about that. Seems that the Right side of the Brain controls the Left side of the body, and the Left side of the Brain controls the Right side of the body, So Left Handed people are in the right mind.


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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Mon 06, 2020 5:10 pm 
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Joined: Oct Thu 18, 2007 11:34 am
Posts: 3634
Location: Port Orchard, Wa 98366
Another way is to use hack saw (if you have the room) or a Dremel tool with either a disk to make a slot or a grinder to use as a drill. I have even used jewelers files to make a slot.

There is also an hand held impact driver that you use a hammer with. Supposed to turn the screw with each blow. (haven't found that too successful though)
I imagine that an impact drill would work but I have no Experience with those.
Or chisel to either knock off the head or use the chisel in a vertical position and make a slot in the head of the screw. If that doesn't work just hammer til you widen the slot and chisel half the head away then use a pair of pliers as now you would have at least a area to grip with the pliers. Or Did I mention? is to use some Kroil or WD-40 and the like, FIRST?

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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Fri 10, 2020 1:35 am 
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Location: San Angelo, TX
I have used a sharp center punch on the side or edge of the head hoping the point will bite into the head and with light taps, turn the screw.


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 Post subject: Re: Damaged screw extractor
PostPosted: Apr Wed 22, 2020 4:48 pm 
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Location: South Central Montana
I generally use very sharp diagonal cutters held so the cutter tips engage the edges of the screw head.

T.


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