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Broken Screw & Easy Out question

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Broken Screw & Easy Out question

Old 09-15-13, 05:37 PM
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Tandem Tom
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Broken Screw & Easy Out question

I installed new Ergon grips on our LHT's and while having mine bike upside down on the handle bars bars and seat one of the screw heads snapped off. This is the screw that attaches the grip to the bar.
I was thinking about drilling and using an Easy Out.
Thoughts?
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Old 09-15-13, 05:42 PM
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What size screw?
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Old 09-15-13, 05:43 PM
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I think it is a 5mm. Looks to be the same size as the ones that hold our racks onto the frame.
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Old 09-15-13, 05:55 PM
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Originally Posted by Tandem Tom View Post
I think it is a 5mm. Looks to be the same size as the ones that hold our racks onto the frame.
OK, then the odds favor you if you can drill straight. Usually breaking the head off (not torquing it off) removes the tension load in a screw, so it's purely a matter of getting traction to turn it out.
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Old 09-15-13, 06:01 PM
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A pick can sometimes be used to tap it. Reverse of the thread direction, carefully, may be able to coerce it out.
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Old 09-15-13, 06:13 PM
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If the end of the screw opposite of the head is accessible, that is it's a through hole as opposed to a blind one, drilling from that direction may back it out without the need for an Easy-Out. If that end of the screw is recessed in the hole so much the better as it will help guide a close-fitting bit down the center of the screw.
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Old 09-15-13, 06:26 PM
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Originally Posted by dsbrantjr View Post
If the end of the screw opposite of the head is accessible, that is it's a through hole as opposed to a blind one, drilling from that direction may back it out without the need for an Easy-Out. If that end of the screw is recessed in the hole so much the better as it will help guide a close-fitting bit down the center of the screw.
I used this method to extract a sheared 5mm bolt. I tried the easy out but was unable to get a good enough bite on it. I was able to put the frame under a drill press and drill from the reverse end of the bolt, then I used a thin drywall screw to back out the sheared bolt.
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Old 09-15-13, 07:46 PM
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The opposite end is not accessible so I will attempt to drill it out. I was thinking about using my drill press and cominng up with some wat to hold the odd shape part.
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Old 09-15-13, 08:00 PM
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Originally Posted by Tandem Tom View Post
The opposite end is not accessible so I will attempt to drill it out. I was thinking about using my drill press and cominng up with some wat to hold the odd shape part.
Since it's a blind hole, and assuming it didn't break from being jammed to the end of the thread.

Select a drill size slightly larger than a standard imperial or metric hex key, but smaller than the distance across the points. Drill the screw to a few millimeters depth. Grind the end of the key so it's sharp and square. Tap it into the hole so it broaches it's own path. You should now be able to simply turn the screw out.

You can do a similar thing with a screw driver, but most are too soft. If you have a hardware store nearby, and a bench grinder at home, cut nails ground to shape make excellent extractors using the above method.
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Old 09-15-13, 08:31 PM
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Left handed drill bits .... not a joke. Get a set and just watch how they spin broken screws out!
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Old 09-15-13, 08:40 PM
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Originally Posted by w8wfo View Post
Left handed drill bits .... not a joke. Get a set and just watch how they spin broken screws out!
Yes, they often do a great job. But I don't know that they're readily available at the neighborhood hardware store.
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