Removing rounded off hex head caliper mounting bolt?
Discussion
Spent most of this afternoon trying the above without success.
The normally hexagonal hole has been completely rounded!
Can't bang a socket on to it as the recess in the caliper isn't large enough.
My current method has been to try and weld a nut on, but no matter what settings I try on my welder the nut just comes straight off without much torque. Now one of the welding bits has snapped in half in the end of the gun, so NOW I'm currently trying to remove that (just snapped an easi-out bit in it. Maybe I can weld a nut to it...
Any more ideas on the caliper bolt? Seems the only option I have left is to grind straight through the caliper spacer and bolt.
The normally hexagonal hole has been completely rounded!
Can't bang a socket on to it as the recess in the caliper isn't large enough.
My current method has been to try and weld a nut on, but no matter what settings I try on my welder the nut just comes straight off without much torque. Now one of the welding bits has snapped in half in the end of the gun, so NOW I'm currently trying to remove that (just snapped an easi-out bit in it. Maybe I can weld a nut to it...
Any more ideas on the caliper bolt? Seems the only option I have left is to grind straight through the caliper spacer and bolt.
Either weld an allen key into the rounded socket head - which I suspect won't work as it sounds like your welder isn't powerful enough to weld tool steel.. . or cut/grind a small groove into one side of the head of the bolt and whack it in the appropriate direction using a chisel and lump hammer. You could also apply some heat to the upright and presumably you'll also have squirted the offending object with penetrating oil?
I use these: http://www.irwin.com/irwin/consumer/jhtml/detail.j...
They're fantastic, never been beaten.
Screwfix sell them, see here
Good luck
Tim
They're fantastic, never been beaten.
Screwfix sell them, see here
Good luck
Tim
Trouble is Tim, he's got a socket head bolt in a recess of the brake calliper. Those bolt extractors are primarily for hex head bolt rather than socket heads which have a smooth round outer. They might work but only if he has sufficient clearance in the recess to get it on the bolt head....
Is it possible to drill out the centre of the socket head with a bit which is half a mill larger then the bolt shank diameter ?
Then the remainder of the socket head will just pop-off as a thick spacer.
You can either grab the outstanding shank with some grips, weld a bolt onto it or cut a slot in it and powerdrive it out.
(Says he who took a week to get one shocker mount out)
Then the remainder of the socket head will just pop-off as a thick spacer.
You can either grab the outstanding shank with some grips, weld a bolt onto it or cut a slot in it and powerdrive it out.
(Says he who took a week to get one shocker mount out)
teamHOLDENracing said:
Trouble is Tim, he's got a socket head bolt in a recess of the brake calliper. Those bolt extractors are primarily for hex head bolt rather than socket heads which have a smooth round outer. They might work but only if he has sufficient clearance in the recess to get it on the bolt head....
Of course you're right, I hadn't visualised it, how about one of these:Here's the link always hated extractors as they often cause more problems than they fix, but the Irwin stuff does seem good.
Tim
Sorry, as you say its not a hex head bolt, its a socket head!
I don't think it is in that tight, so once I've got something on it with some purchase I've no doubt it will come out, the problem is getting to that point. The welder I have is a MIG 150 Turbo, so it should be up to the job, just not sure why it currently isn't working! Now the socket is full of weld, so can't go along the route of welding an allen key in it.
I don't think it is in that tight, so once I've got something on it with some purchase I've no doubt it will come out, the problem is getting to that point. The welder I have is a MIG 150 Turbo, so it should be up to the job, just not sure why it currently isn't working! Now the socket is full of weld, so can't go along the route of welding an allen key in it.
Been there some time ago with my calipers. Ended up grinding off the head of the allen bolt and applying heat to caliper (ally will expand more than steel so this should help loosen things off, just use as little heat as you can). Finally had to drift the caliper off. Done at Austec with the help of Paul and a ramp.
i'm not sure wether you can get to enough of the head to use one of these http://www.amazon.co.uk/Irwin-Bolt-Grip-Remover-39... but i would buy a set anyway they really do work well, especially with a 2 foot breaker bar
jammy_basturd said:
Sorry, as you say its not a hex head bolt, its a socket head!
I don't think it is in that tight, so once I've got something on it with some purchase I've no doubt it will come out, the problem is getting to that point. The welder I have is a MIG 150 Turbo, so it should be up to the job, just not sure why it currently isn't working! Now the socket is full of weld, so can't go along the route of welding an allen key in it.
I had this on one of the race cars on a rear calliper. The chisel method, hitting it on one edge so it applies an anti clockwise force, shifted it in the end.I don't think it is in that tight, so once I've got something on it with some purchase I've no doubt it will come out, the problem is getting to that point. The welder I have is a MIG 150 Turbo, so it should be up to the job, just not sure why it currently isn't working! Now the socket is full of weld, so can't go along the route of welding an allen key in it.
Steve_T said:
Been there some time ago with my calipers. Ended up grinding off the head of the allen bolt and applying heat to caliper (ally will expand more than steel so this should help loosen things off, just use as little heat as you can). Finally had to drift the caliper off. Done at Austec with the help of Paul and a ramp.
Why would you heat the calliper? Its the upright that the thread is seized into...
Some reason no amount of welding things on was getting it to budge. The bits I kept welding either would snap at the weld, or just snap.
Ended up grinding through the bolt behind the caliper (through the spacer). Had to hacksaw half of it due to clearance issues.
Don't think the bolt was seized actually though. The bolt head came out of the caliper easy enough, and the remainder of the bolt came out of the hub relatively easily with some mole grips.
Anyway, problem solved. Thanks for everyone's help.
Ended up grinding through the bolt behind the caliper (through the spacer). Had to hacksaw half of it due to clearance issues.
Don't think the bolt was seized actually though. The bolt head came out of the caliper easy enough, and the remainder of the bolt came out of the hub relatively easily with some mole grips.
Anyway, problem solved. Thanks for everyone's help.
Successfully removed a rounded off hex head bolt on my brake caliper the other day by using a pipe wrench with a hollow pipe slipped over the handle for extra leverage. Everything else tried previously failed to loosen the bolt and eventually the head rounded out on me. The pipe wrench was a last ditch effort which proved to be successful!!!
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