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Rounded off mech hanger bolt in a titanium frame - suggestions?

  • 21-05-2016 11:28PM
    #1
    Fireball XL5
    Registered Users, Registered Users 2 Posts: 112 ✭✭


    The mech hanger on my titanium frame is bent but when I went to remove it I rounded off one of the counter sunk bolts that attaches the hanger to the frame. I say bolt but it is more akin to a grub screw. I am not so keen to cut a slot in the head of the bolt as the countersunk element will also result in a cut to the titanium frame. I have tried to drill out the bolt but every drill bit I have used has simply become blunted and made no impact.

    Help !

    Any thoughts? :confused:


Comments

  • #2
    Homer1798
    Registered Users, Registered Users 2 Posts: 87 ✭✭Homer1798


    Try drilling the grub screw out from the other side as the drill bit will be travelling the same way as the tread in the frame and with a bit if force may actually unscrew it fro you.


  • #3
    StevieGriff
    Registered Users, Registered Users 2 Posts: 859 ✭✭✭StevieGriff


    Homer1798 wrote: »
    Try drilling the grub screw out from the other side as the drill bit will be travelling the same way as the tread in the frame and with a bit if force may actually unscrew it fro you.
    This ^. And I know it seems obvious but make sure you aren't using a masonry or wood bit, seems a bit odd that you were blunting the bits.


  • #4
    triggermortis
    Registered Users, Registered Users 2 Posts: 2,732 ✭✭✭triggermortis


    You really need an easy-out to remove this screw. You drill a hole where the existing allen key would fit in and then use the easy-out to screw out the damaged screw. If you're not confident doing it yourself then maybe a bike shop or garage can help


  • #5
    Cee-Jay-Cee
    Registered Users, Registered Users 2 Posts: 12,234 ✭✭✭✭Cee-Jay-Cee


    Are you sure your using proper metal/steel bits? They shouldn't be rounding off unless the screw is made from Some sort of ultra toughened steel/carbide.


  • #6
    macnab
    Registered Users, Registered Users 2 Posts: 1,302 ✭✭✭macnab


    The bolt might be made from stainless steel, if so you will need to use a slower speed drill and a lot of force (low speed, high feed)
    Stainless bolts are usually not magnetic, so try that first to see if your bolt is stainless.


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  • #7
    myclist
    Registered Users, Registered Users 2 Posts: 151 ✭✭myclist


    Try this. If its an allen screw get a Torx key thats one size bigger and press it in with a vice grips or a g clamp and you should have no problem removing it. You could try driving the Torx bit in with a hammer if you are careful.


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