Drilling out an M6 bolt
Discussion
So, didn't my suggestion of 3 weeks' ago work ??
Tuesday 3rd July
Right, get yourself a piece of plywood or timber about 75mm square and 20mm thick and a G-clamp.
Drill a 20mm diameter hole in the middle of one side all the way through.
Place the hole over the head of the bolt.
Position G-clamp so one end of the jaw is on the end of the bolt and the other on the piece of ply/timber.
Tighten.
Tuesday 3rd July
Right, get yourself a piece of plywood or timber about 75mm square and 20mm thick and a G-clamp.
Drill a 20mm diameter hole in the middle of one side all the way through.
Place the hole over the head of the bolt.
Position G-clamp so one end of the jaw is on the end of the bolt and the other on the piece of ply/timber.
Tighten.
mosstrooper said:
So, didn't my suggestion of 3 weeks' ago work ??
The 'screw' end of the clamp just tilts over at a silly angle and no force can be applied. I can't use the clamp the other way up as the fixed end won't go through the hole due to the curve of the clamp.I have a number of situations. Some bolts have rusted through between the wood and the frame, some nuts have come off but others have sheared leaving no end, others are so close to the corner of the frame there's little room to work in. I think I could, using a combination of methods, get perhaps 25 out of 30 bolts out but it would involve a fantastic amount of effort so I've decided to restore the wood in situ and only remove the three bolts I really have to (to replace a missing plank). The left bolt has come out, the middle one has sheared off leaving nothing on either side and the right one has a thread underneath but no top. At least the middle one can be drilled out as I can get a drill in line!
I'll sort it out eventually somehow using either brute force or cunning!
dickymint said:
With the best will in the World - some posters just don’t get it 
This post was a simple question about diameters, but then lost focus with various people giving various helpful ideas on how to disassemble a structure. I have that structure in front of me, and so can judge whether those ideas will work or not.I'mm a woodworker not a metalworker. As I said in more detail above, I will do the best I can with what lies in front of me and it will work out eventually. Thanks to everyone who posted ideas; some may work.
Simpo Two said:
dickymint said:
With the best will in the World - some posters just don’t get it
This post was a simple question about diameters, but then lost focus with various people giving various helpful ideas on how to disassemble a structure. I have that structure in front of me, and so can judge whether those ideas will work or not.I'mm a woodworker not a metalworker. As I said in more detail above, I will do the best I can with what lies in front of me and it will work out eventually. Thanks to everyone who posted ideas; some may work.
https://www.youtube.com/watch?v=I3PdxUvhgTw
Maybe not helpful but clever and a bloody funny guy.
Edited by dickymint on Monday 30th July 17:26
dickymint said:
Saw this and thought of you.............
That's about right!I hate metal, it's a b
h. Just everything goes wrong or doesn't work. Already broke two special cobalt drills drilling 1.1 bolts out. The one in the right-angle chuck has gone in about 10mm but refuses to go any further. Hard to get any pressure on. And that's only 6mm, they need to be 8. More drills on the way...Wood
Simpo Two said:
dickymint said:
Saw this and thought of you.............
That's about right!I hate metal, it's a b
h. Just everything goes wrong or doesn't work. Already broke two special cobalt drills drilling 1.1 bolts out. The one in the right-angle chuck has gone in about 10mm but refuses to go any further. Hard to get any pressure on. And that's only 6mm, they need to be 8. More drills on the way...Wood
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