Look 695 - Rear derailleur bolt stuck

Discuss light weight issues concerning road bikes & parts.
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iankovski
Posts: 17
Joined: Mon Jul 06, 2015 5:44 pm

by iankovski

Guys, unfortunately I’ve broken my rear derailleur hanger. Bad news is that one of the two bolts got stuck.

Any suggestion how to solve it?

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pdlpsher1
Posts: 2424
Joined: Thu Jul 19, 2012 6:09 pm
Location: CO

by pdlpsher1

First option is use a left hand drill bit and drill out the bolt. And hopefully the screw will just come out without drama. You can also use a right hand drill bit but the left-over tip of the screw might get stuck once the bolt head has been drilled out.

by Weenie


alcatraz
Posts: 2220
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

What I do in these situations is I use a cheap chinese dremel (mini grinder) with one of those mini cutting discs to cut a slit in the head so I can fit a flat blade screwdriver bit in it. The smaller the disc diameter, the deeper you can cut without touching the frame.

iankovski
Posts: 17
Joined: Mon Jul 06, 2015 5:44 pm

by iankovski

pdlpsher1 wrote:First option is use a left hand drill bit and drill out the bolt. And hopefully the screw will just come out without drama. You can also use a right hand drill bit but the left-over tip of the screw might get stuck once the bolt head has been drilled out.
Oh snap! I’ll try to find the tools and work on it.


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Attermann
Posts: 385
Joined: Sun Jan 05, 2014 11:04 pm
Location: Denmark

by Attermann

Just hammer a torx bit in it, works really well

AJS914
Posts: 3488
Joined: Tue Jan 28, 2014 6:52 pm

by AJS914

Try some penetrating oil on it first.

alcatraz
Posts: 2220
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

+1 on torx bit. I usually try that first. Forgot to mention it in my post.

by Weenie


iankovski
Posts: 17
Joined: Mon Jul 06, 2015 5:44 pm

by iankovski

Thank you all, guys. I’ll let you know when I solve it how I solved it.


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