- Pad retaining bolt rounded out – what are my options?
I've just been through my shed looking for bits to build up a bike for my missus and found a working rear brake and a front brake in which the pad retaining bolt is rounded out.
I'm sure that 'drilling it out' will come up but as far as i'm concerned you might as well ask me to build a suspension bridge; are there any other options?Posted 8 years ago
you wont be able to drill it out as the bolt is steel and the calliper is aluminium alloy – you'l just gash up the calliper.
Is it a hex bolt?
Try and tap a torx bit into it to see if you can get some purchase.
Try and cut a slot – deep and wide enough – for a screwdriver to try and get it out.
Molegrips on the head?
Bit of penetrating fluid first to make it easier?
then replace it with a bent paperclip or splt pin.Posted 8 years ago
Is it a hex bolt?
Well, it was, now it's a 'circle bolt'.
Hmm, might try the hacksaw/flat head route first but failing that some other good ideas. The Torx bit also sounds a goer if I can't work the hacksaw blade in there (no dremel – how i realise i should have one now!)
Molgrips were my first attempt but there's not really enough room for the fat ended ones I have.
Cheers folks 🙂Posted 8 years agoBrownMember
Sounds slightly ridiculous (and probably is), but needle-nosed pliers on the main shaft of the pin with molgrips clamping them shut proved the only way to get the stuck pin out of Maguras.
Slots/filing flats for spanners/stud extractors all failed (well, I failed to make them work…)
Knackered the pliers, but saved the brake.Posted 8 years agolcjMember
Never brake ever again. That way you'll not only get faster, you'll save money on pads too. In fact, if you're not going to brake you could just forget the brake altogether and save weight! You're welcome.
On a more serious note, is the caliper a one piece? If not, would separating the halves help?Posted 8 years agosnowslaveSubscriber
I had exactly this problem. Completely fixed by using a gadget whose name I completely forget, but anyway, you put it in your drill, and then stick it in the scooped out pin on your brake and drill away. The gadget is like a screw with a reverse thread and it basically bites into the retaining pin and then pulls it out, like as if it has magical powers.
Edit – just looked in my toolkit. The device in question is called a "damaged screw and bolt remover", made by GRABIT. I tried all the options mentioned here and none worked – then GRABIT changed my life.Posted 8 years ago
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