Removing a rounded ...
 

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[Closed] Removing a rounded off mech hanger screw?

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So upon trying to remove this little screw I managed to round it off, then I tried using a torx head one size up and it still won't budge.
Answers on a postcard please.
Here's a pic of my tragedy for your amusement.
[img] [/img]


 
Posted : 24/10/2015 10:52 am
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If you can drill it out enough so it collapses or to get a stud extractor in that might be an option.

Or a dremmel type multi tool with a cut off disk to create a slot and allow for a chunky flat screwdriver in with some leverage.

I've done both methods with equal success although the dremmel is quicker - as long as your're careful as they cut through metal like butter.


 
Posted : 24/10/2015 10:55 am
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I'd rather not spend any money on a tool I'll never use again. I do have a drill though with wood and masonry bits. Do I just drill through the screw, wouldn't that just create a screw with a hole through the middle?


 
Posted : 24/10/2015 11:02 am
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Just drill the head off the screw.


 
Posted : 24/10/2015 11:10 am
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I'd be carefull using non metal drill bits as they could slip and make a mess.

If you want to persist try the wood drill at a low speed and see if it bites into the aluminium.

The idea of drilling it out is to use a drill bit slightly smaller than the hole in the frame it screws into. That way it will have no strength (the head will fall off as mentioned above) and you should be able to twist / dig the remains out cleanly.

Be careful with drill pressure and speed until it has a start though.


 
Posted : 24/10/2015 11:10 am
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but you need a metal drill bit not a masonry or a wood drill bit!


 
Posted : 24/10/2015 11:11 am
 teef
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I'd rather not spend any money on a tool I'll never use again

You can get cobalt drill bits on ebay for less than £2:

http://www.ebay.co.uk/itm/HSS-COBALT-JOBBER-DRILL-BIT-FOR-DRILLING-STAINLESS-STEEL-CR-NI-HARD-STEEL-/360510237946?var=630062040827&hash=item53f015acfa:m:m7qwRUAG-ISxxaInXieK0jQ


 
Posted : 24/10/2015 11:27 am
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Drill a hole a 'peruade' a slightly larger Torx bit in, works much better than a screw extractor.


 
Posted : 24/10/2015 11:30 am
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cool, thanks all.
What size drill bit do I need? the smallest you reckon, 1mm?
so I just drill a hole through and then what?


 
Posted : 24/10/2015 11:32 am
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Use a drill bit that is slightly smaller than the diameter of the head of the screw. A HSS drill bit is what you need and be very careful. No need to push on it just let the drill bit do the work. drill a little, check progress, drill a little more.

That kit that is mentioned in the post above is rubbish in my experience of buying one to do this and taking it back because it didn't work.


 
Posted : 24/10/2015 11:43 am
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Worth giving this a go?

http://lifehacker.com/5462520/remove-a-stripped-screw-with-a-rubber-band


 
Posted : 24/10/2015 11:57 am
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I'd use a larger bit and drill the head off insted of trying to drill all the way through the bolt.
Once the head has gone there'll be no pressure on the shaft and what's felt of the bolt will just turn out with some grips.
Had to do all six bolts on a rear hub rotor a couple of weeks ago. 😐


 
Posted : 24/10/2015 12:01 pm