I managed to over tighten and strip the screws that attach the column to the base on my g0704.
They are m12 cap head screws near the base there are 4 of them. Is it even possible to extract these?
I stripped two of them like an idiot.
I managed to over tighten and strip the screws that attach the column to the base on my g0704.
They are m12 cap head screws near the base there are 4 of them. Is it even possible to extract these?
I stripped two of them like an idiot.
Did you actually strip the threads or the socket head?
If the socket head, you can drill the heads off. Just drill with a body sized drill bit until the head pops off. Slow speed and a lot of pressure, these are hard bolts. Then remove the column and remove the rest of the screw, or maybe you can screw it out with a pair of needle nose pliers
Jim Dawson
Sandy, Oregon, USA
Yeah the socket head I meant. So if I drilled the head of the socket head cap screw...it will just pop off? Is the head the only part holding the column against the base?
Thank you for such a quick reply.
I was thinking of using a hex bit driver and jbweld it and leave it 24 hour over night
Jim Dawson
Sandy, Oregon, USA
Once you have taken off the head of the last bolts what might happen to the part that is freed?Consider very carefully the possibility that a large and heavy piece of machinery might land on your head.
Wouldn't fancy drilling it myself.
I'd see if I could knock an imperial size bit in the bolt heads if the heads are metric.
Or I'd grind a slot across the bolt head and use something with a flat end to screw it off.
Go buy a screw extractor set. They make them for SHCS.
https://www.amazon.com/Irwin-Tools-5...24363678&psc=1
The Imperial to metric method works. Assuming there is a slightly large Imperial size, just hammer it in and then turn.
Or you can grind a slightly large allen to a hexagonal taper, hammer it in, and then turn. That has worked very well for me.
I've also had good luck with left handed drill bits, you start drilling, pretty often the drill bit will grab and turn the bolt. If it does't grab, you just drill the head off.
If you can find a star bit of the right size which is a tight fit, it'll take the screw out. I remember reading somewhere a long time ago that hex bolts are engineered to strip out before any permanent damage should occur.
To be honest, Im a bit scared to drill the head off, considering that the bolt is under lots of tension, wouldnt the head fly off if I drill it off?
No. The head would be captured by the drill bit, but it wont release with any appreciable force. You've never drilled the head off a bolt, obviously, nothing wrong with that though. All of the recommendations here are totally reasonable and safe. Pick one that suits you and go for it.
If you have enough room to work, the easiest way would be cutting a screwdriver slot in the bolt cap with a small angle grinder.
Never going to be able to loosen a madly torqued 12mm bolt with a screwdriver slot. If he has that kind of access then the absolute easiest way is to weld the shank of a bolt to the existing bolt and just use a wrench to take it off. The heat from welding will also tend to loosen things. Doesn't matter though because he doesn't have the room for either of those options on those bolts anyway.
If the thread is stripped its gonna be under little or no pressure anyway! If there are still two bolts / screws that are under tension the there is no chance with the head / column falling. What sort of Gorilla torque were you using to strip HT M12 bolts ? ? ? Personally i'd try a LH drill bit - if the head has to come off anyway, the LH drill may catch and screw it out ?
Those tramming blocks are legit. I need to make me some. Somebody should be selling those.