How do you drill out a bolt?

Soldato
Joined
5 Nov 2004
Posts
2,546
Buy yourself a left handed HSS drill bit then using a reversable drill start drilling it and the heat of the drill and the reverse rotation will often undo it. If it doesn't then provided the drill is the correct core size for the thread in question you should be able to peel the remainder of the thread out of the hole.
 
Man of Honour
Joined
11 Mar 2004
Posts
76,634
No easy way. if its a bolt and nut option, you just get a drill slightly larger than the diameter of the thread. Drill into the head or the nut till it falls off.
If its a bolt into a pre threaded hole(ie in the car rather than a nut) then drill out at the same size as the diameter of the thread then get a thread maker tool, to re-do the thread.
 
Associate
Joined
18 Oct 2002
Posts
1,928
Location
Sheffield
Drill a pilot hole with a small bit. It must be dead centre - this is the most important and hardest to do part.

Increase drill bit size until the drill bit is almost the diameter of the bolt.

The bolt thread should then peal out or can be picked out.
 
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