Got some chainring bolts that just won't undo, any suggestions?
Bike Forum
Undoing seized chainring bolts, any ideas?
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Posted 6 months ago #
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drill
Posted 6 months ago # -
Try pouring boiling water over it and trying again. The heat should shock the metal some.
Posted 6 months ago # -
I have a similar problem.
anyone know who does the chainring bolts that have a allen key hole in each side. they seem a much better idea
Posted 6 months ago # -
Podge - Truvativ
Posted 6 months ago # -
Cheers jock,
Cruzheckler bit drastic that!
Posted 6 months ago # -
You are using a chainring bolt tool arnt you ?
Posted 6 months ago # -
I had vaguely imagined that chainring bolt tools would make my life (and changing chainrings) utterly joyful. Imagine my dismay (when I finally bought one), to find that it's still a right pain and even with the correct tools it's eminently possible to remove the skin from one's knuckles.
Posted 6 months ago # -
Stick an allen head attachment in a drill and try to buzz it out, this can sometimes work.
If not plusgas and try the same.
If not replace allen head with drill bit and beast it out
Posted 6 months ago # -
Stick an allen head attachment in a drill and try to buzz it out, this can sometimes work.
If not plusgas and try the same.
If not replace allen head with drill bit and beast it out
yes ,maybe it don't need the complicated methods ,good luck !
Posted 6 months ago # -
If its seized then its probably corroded to a degree.
Drill....+1Posted 6 months ago # -
Support well from behind and hit with a hammer. That will shock them and break the bonds.
Posted 6 months ago # -
If the drive slot on the back part has worn away in the anti-clockwise direction then try tightening them first to break the bond...
Drilling might be difficult if they are just spinning in the cranks. Put the hex key in a vice, slot the crank onto it, then a hammer & punch on the grooves in the back part of the bolt should get it started. Might need a third hand to hold the crank steady.Posted 6 months ago # -
pee on it first
Posted 6 months ago # -
and when you put stuff back in give all the surfaces a light coat of coppaslip or equiv
Posted 6 months ago # -
try the least damaging ideas first, that way its harder to end up in a worse state
boiling water,
wd40,
extend the leverage of the allen key using a piece of narrow diameter pipe,
etc,If its still on the bike put the chain on the outer ring so you don't stab yourself badly on it if you slip
Posted 6 months ago # -
Are you using one of these - I presume they are not double hex/torx?
Posted 6 months ago # -
they're soft aluminium so very, very easy to drill out. Should only take a couple of minutes.
Try not to drill a hole in your frame though.
Posted 6 months ago # -
Fenwicks Degreaser, a wire brush, GT85 and a lot of swearing
will probably do the trick
Posted 6 months ago # -
A wire brush??
Posted 6 months ago # -
Fenwicks Degreaser, a wire brush, GT85 and a lot of swearing
that's for hemorrhoids, not chain ring bolts.
Posted 6 months ago # -
Gary_M - Member
they're soft aluminium so very, very easy to drill out. Should only take a couple of minutes.
Aluminium chainring bolts? Unlikely unless they're aftermarket ones. Usually made of chocolate anyway so never on there long enough to seize!Posted 6 months ago # -
Cheers all, using the correct tools but as said above, they don't help much. Takisawa, the hammer and punch sounds worth a try
Posted 6 months ago # -
D-R-I-L-L
Posted 6 months ago # -
Haha Gary, trying to avoid that!
Posted 6 months ago #
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