Drill Bit facts

While investigating facts about Drill Bit Sizes and Drill Bit Sharpener, I found out little known, but curios details like:

In 1963, Donald Currey cut down a tree to retrieve his drill bit after it got stuck when he was trying to core it to study climate effects. After studying the core of the tree, he found that he'd just cut down the oldest tree (at least 4862 years old) found to date.

how drill bits are made?

A New York woman was hospitalized after a bit of a dentists drill lodged near her eye. The dentist was dancing to "Car Wash" at the time. The patient later sued the dentist for $600k.

What drill bit for brick?

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what drill bit for tiles. Here are 13 of the best facts about Drill Bit Set and Drill Bit Size Chart I managed to collect.

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1. A small miscalculation and a 14 inch oil drill bit caused a Salt mine to collapse, a lake to reverse direction and created Louisiana's largest waterfall yet not a single person died.

2. 99% of the barite used in the United States is for drilling mud. The flow of fluid cools the drill bit and suspends the rock cuttings produced by the drill and carries them up to the surface.

3. In 2003 a man survived being impaled through the eye with an 18-inch long, 1 1/2-inch diameter chip auger drill bit. He fell off the ladder face-first and the drill went through his right eye and out his skull, just above his right ear. The drill pushed his brain aside, rather than impaling it.

4. The deepest hole drilled by humans into the Earth is a bit over 12 km. If the Earth was an onion, that would be the equivalent of the first layer of skin.

5. There are drill bits that can drill square holes

6. In 1980, a Texaco oil rig accidentally drilled into a massive salt mine under a louisianan lake. Due to a miscalculation, the 36cm drill bit entered the mine, starting a chain of events including sucking down 11 barges like they were rubber duckies.

7. [TIL]: A surveying error caused a 14" drill bit to puncture a salt mine, causing a lake to drain into the mine. The drill rig, several barges and a large area of land, were all pulled into the resulting whirlpool.

8. The Audi Scare. In 1986, 60 Minutes claimed that the Audi 5000 suffered from "Sudden acceleration." It was later found that the whole bit was doctored. A hole had been drilled into the transmission, while a can of compressed air was used to pop gears while the vehicle was stopped.

9. Potato starch is used in oil drilling. The starch reduces fluid loss in the "drilling mud", a liquid which is pumped into the hole to clean and cool the drill bit, flush to the surface the drill bit cuttings and suspend the drill cuttings while drilling is paused.

10. There is a triangular drill bit that could create square holes.

Why drill bit for metal?

You can easily fact check why use a step drill bit by examining the linked well-known sources.