The smallest hole ever



WORLD'S SMALLEST HOLE
THE LONGEST LIST OF THE LONGEST STUFF AT THE LONGEST DOMAIN NAME AT LONG LAST

What is the world's smallest hole?


In November 2006, using electro-discharge machining, which is a fancy name for drilling small holes, scientists from Cardiff University have drilled a small hole, in fact the world's smallest hole.

The hole was drilled into a piece of metal and measures a tiny 22 microns or 0.022 millimeters wide and was drilled 5mm deep.

For comparison, the average human hair is about 45 microns wide.

The smallest hole ever

The smallest hole ever

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