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Author Topic: Removing broken M3 screws in handlebar controls  (Read 1117 times)

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Offline shads

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Removing broken M3 screws in handlebar controls
« on: May 20, 2018, 02:59:37 PM »
When taking my controls apart I found that the heads were stripped off of two screws and I had to drill them out to remove them.  Im now struggling to get broken screws out - ive tried a 1.5m left hand drill bit but that didn't grab and the screw extractors I have don't go small enough.  Any ideas?
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Offline Jore

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Re: Removing broken M3 screws in handlebar controls
« Reply #1 on: May 20, 2018, 10:08:57 PM »
since you've drilled it already, you could try jamming a thin screwdriver or allen key and twisting it, if you're confident with a welder, do a small point on it and try grabing it with some locking pliers
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Offline RAFster122s

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Re: Removing broken M3 screws in handlebar controls
« Reply #2 on: May 21, 2018, 01:25:40 AM »
Buy a bad of Alum and soak it in a high Alum and water solution and the Alum will eat the steel screw out of the holes.  If the threads were not screwed up from before and you did not drill into them, then you should be able to replace the screws and be on your merry way.  Google Alum and steel and you will find more about this technique of steel screw removal in alloy parts like aluminum and some zinc metals.

David
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Offline shads

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Re: Removing broken M3 screws in handlebar controls
« Reply #3 on: May 21, 2018, 01:55:46 AM »
Just google'd it... what a neat trick!  Thanks very much  :)  Off to the shop to pick up some Alum it is
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AwesomeCB

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Re: Removing broken M3 screws in handlebar controls
« Reply #4 on: May 21, 2018, 02:52:16 AM »
Please update your post with your findings. News to me, for sure.
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Offline flybox1

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Re: Removing broken M3 screws in handlebar controls
« Reply #5 on: May 21, 2018, 08:32:09 AM »
Left handed drill bits...used slowly, will turn out most
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Offline RAFster122s

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Re: Removing broken M3 screws in handlebar controls
« Reply #6 on: May 21, 2018, 11:36:12 PM »
Left hand bits are very useful tool to have in your toolbox if you have a drillpress.
But, I priced a single bit from Fastenal and it was $13 for one bit...

Where is a good source for a set that is good quality that is not a fortune?

David
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Offline Airborne 82nd

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Re: Removing broken M3 screws in handlebar controls
« Reply #7 on: May 22, 2018, 12:54:20 AM »
Quote from: shads on May 20, 2018, 02:59:37 PM
When taking my controls apart I found that the heads were stripped off of two screws and I had to drill them out to remove them.  Im now struggling to get broken screws out - ive tried a 1.5m left hand drill bit but that didn't grab and the screw extractors I have don't go small enough.  Any ideas?
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Offline RAFster122s

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Re: Removing broken M3 screws in handlebar controls
« Reply #8 on: May 22, 2018, 01:20:29 AM »
Quote from: shads on May 21, 2018, 01:55:46 AM
Just google'd it... what a neat trick!  Thanks very much  :)  Off to the shop to pick up some Alum it is

Not a problem, save the solution for future use unless you wish to start afresh. If it were expensive of course...

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