Help getting sheared bolt out of its home

[yod]

geez maximus....you're a veritable ocean if handy where-to-get-oddball-tools-palmy-north kinda guy aren't ya!! thanks mate - i was wondering if anyone did them separately instead of the 5 size/pack version

not sure whether it had the tap handle....was really looking for it cos i didnt know it might have one.....

i dont think it's very likely i'll use it again/much....very unlikely if i'll use the bigger sizes at all so the single size miight work better....

the bolt could be a bit of a prick - have to have another look. it comes directly out of the bottom of the frame but (i think) it might be directly above where another part of the frame crosses...bugger....not too bad to try the tap/punch approach but getting a drill in there straight could be a mission....will see later tonight!!!

[yod]

scratch that - just check some photos and there isnt any part of the frame in the way WOOHOO! but might have to work a few drain hoses and/or part of the loom out of the way

[Babelfish]

sweet, flick some pics up of the bolt, and also of the skinned knuckles post hose removal

[yod]

the offending bolt bit is GONE!!!

don't you love that feeling when you got some pain-in-the-ass mechanical annoyance and then you just try something and it works like a farkin dream?

i drilled into the bolt with a 2.5mm bit (very gently) made about a 3mm depth, then took a 100mm fencing nail (now THATS classy...) and smacked that into the hole a few times in an attempt to make some edges in the hole, then put a small hex drive bit in the bat-drill and start drilling in reverse, spin spin spin catch!! and it just screwed out.....

happy farkin happy, joy farkin joy....now i just need to find a new mount for that side...hmmmm

thanks for the advice lads....put me in the right direction

[Dodgyiti]

I've extracted heaps of broken or siezed bolts over the years and the advice so far is pretty sound. You mention that the bike has been binned and that indicates to me that the bolt/stud was sheared off, not broken trying to extract it with a siezed thread. With that in mind you may find that the remaining piece of bolt is just sitting in there, offering no resistance. I have sometimes managed to get bits of broken bolt like that out by gently tapping a sharp centrepunch (or even a sharpened nail) on the outer edge of the broken face, rotating the broken piece of bolt a small amount at a time. After a minute or two you'll have enough to grab with pliers or whatever. I'd try this first as the comment about only getting one shot at it is spot on. Don't rush it!

So true, I would try that first, but to me that is a given, must remember that not everyone has had the sufference of this happening before. Also just drilling the hole for the ezout can get it turning, or I use a mini gas torch for a bit of persuasion. Snapped bolts can be hard to remove if the remaining bolt in the hole is in any way bent or distorted.
When I was a poor apprentice (back in the day.. ) I would drill the bolt out as much as I could and ram a smaller bolt in the hole with a hammer ( using full engineering training) and then try undoing the bolt and it would take the thin wall and threads of the stuck bolt out with it, but that is a bit rough.

[Ixion]

I have had surprising success, on larger bolts , by drilling the appropriate sized hole and putting in one of those "Dynabolt" things that are used for attaching stuff to walls. You wind the bolt head and it locks into the hole. Then grasp the whole dynabolt with vicegrips. This is particularly sueful when the offending bolt is broken off down inside the hole so that you cant easily get at it.

[classic zed]

Drill a hole in the bolt and tap a "TORX" bit into it, torx bits are usually very hard and will cut themselves into the hole nicely, I have found that with ezyouts sometimes if the hole you drill is too big whats left of the bolt is too thin, because the ezyout is tapered it can spread the bolt and lock it in the threaded hole.

[scumdog]

Be wary of ezy-out type tools- they CAN cause the drilled out bolt to 'swell' or swage out as they get screwed in and lock things even tighter.

[peasea]

the offending bolt bit is GONE!!!

i drilled into the bolt with a 2.5mm bit (very gently) made about a 3mm depth, then took a 100mm fencing nail (now THATS classy...) and smacked that into the hole a few times in an attempt to make some edges in the hole, then put a small hex drive bit in the bat-drill and start drilling in reverse, spin spin spin catch!! and it just screwed out.....

Couldn't have been that tight then huh? Lucky lad. Any light engineering shop could make you a mount if you can't buy one. Good on ya.

[rifleart]

Try and get it right the first time otherwise it can get messy.