If a doctor does it, pressure is relived and everything is alright. Anyone else does it and it will probably kill you.
Although some people believe that it will expand their consciousness through increased blood flow to the brain, one person who went through the procedure said:
"come to the frustrating conclusion [four weeks after the procedure] that the trepanation has had no lasting effect… Trepanation has no more physiological effect than any other trauma… it does not do what many hope it will."
Read more about trepanation and self-trepanation in the link below.
The column holds the machine head and transmission at the top and allows the table to be raised to fit the work being drilled.
If it broke off were you can't put a socket on it , Then you will need to drill through the center of it and then put a easy out in the hole that you drilled in it and hope it will screw out then. If it don't then you will need to drill it all the way out and install a heley coil in the head.
Drill Head.
no beacuse my head in not like a drill its like a pin
First you attempt to remove the bolt with an 'ease out' type tool. If that fails you then must either: take the head off to have it drilled, or drill it on the car, then thread and insert a thread repair insert.
A counterbored hole in engineering is used to create a recessed area at the top of a drilled hole. This allows for a screw or bolt head to sit flush with the surface. It is different from a regular drilled hole because it has a wider diameter at the top to accommodate the head of the fastener.
To remove a nail after the head breaks off simply drill through the nail with an equal sized drill bit.
they drilled a hole in the victims head to releive pressure
To effectively remove a broken screw head using a screw extractor tool, follow these steps: Drill a small hole into the center of the broken screw head using a drill bit slightly smaller than the screw extractor tool. Insert the screw extractor tool into the drilled hole and turn it counterclockwise to grip the screw head. Use a wrench or pliers to turn the screw extractor tool counterclockwise to remove the broken screw head from the material. Apply steady pressure and avoid using excessive force to prevent further damage.
the hole was a dead end hole you drilled all the way thru and into the water jacket. depending on the model of head you just made sure you get to buy another and replace the one you drilled. Next time go to a mechanic that knows what they are doing.
For drilling into metal, use a Phillips head drill bit that is 1/8 inch in size.
To effectively drill out a screw in metal, follow these steps: Use a drill bit that is slightly smaller than the screw head. Place the drill bit on the center of the screw head and drill slowly to create a pilot hole. Increase the drill bit size gradually until the screw is loosened. Use pliers or a screw extractor to remove the remaining screw.