Drilling Large Holes in Cast Iron with a Trepan Tool!
33:04
YouTubeNYC CNC
Drilling Large Holes in Cast Iron with a Trepan Tool!
Trepan drilling with Paul Debolt. Boring large holes to diameter "takes too long and wastes material." Trepanning saves time and money! Not only does it require less horsepower than typical drills, a pristine slug is left behind, which can be sold or used to make other parts. Paul walks us through how he uses his trepan tool, which is made of a ...
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Trepanning History
A history of trepanning: Why do we put holes in our skulls?
A history of trepanning: Why do we put holes in our skulls?
popsci.com
2024年3月7日
Trepanning is a process whereby a hole is drilled in the skull, and, with evidence going back to prehistoric times, it is one of the oldest surgical practices in history. The earliest trepanned skull was discovered at a Neolithic burial site in France, and is more than 7,000 years old. It may have had a practical effect – to relieve pressure on the skull after an injury – but it could have also been used to give a trapped demon a hole to escape, or so it was believed. Many different civilisation
0:56
Trepanning is a process whereby a hole is drilled in the skull, and, with evidence going back to prehistoric times, it is one of the oldest surgical practices in history. The earliest trepanned skull was discovered at a Neolithic burial site in France, and is more than 7,000 years old. It may have had a practical effect – to relieve pressure on the skull after an injury – but it could have also been used to give a trapped demon a hole to escape, or so it was believed. Many different civilisation
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