Resultado da Busca
3 de jan. de 2022 · Many of the holes and cores that were found in Egypt have regular helical grooves with quite a large pitch (>1mm/rev). As the link you posted showed, the grooves in the core seem irregular and horizontal... That's strong evidence that many ancient holes were not ground.
The granite core published by Petrie was made by the ancient Egyptians using a tubular drill. Note the similarity of the concentric lines (arrow) found on the core.
Petrie's Egyptian Core #7 An Advanced Primitive Machining Explanation. By Joel M Williams (text and images ©2015) Abstract. Based on the chemistry of minerals, Petrie's "Infamous Core #7" is shown to have been produced easily by milling techniques far less advanced than those espoused to exceed modern milling technology.
27 de mai. de 2020 · #lostancienthightechnology #granitecores #core7Wow!Turns out that this ancient Egyptian driiling technique for grante cores not only works. It is perfect eve...
Egyptian core drilling hole and Core 7. It seemed from the evidence described by Petrie that a sure way to create the spiral groove was to use a process whereby the tool oscillated, like a jack hammer or hammer drill, while it turned.
1 de mar. de 2015 · Based on the chemistry of minerals, Petrie's "Infamous Core #7" is shown to have been produced easily by milling techniques far less advanced than those espoused to exceed modern milling technolog
22 de mai. de 2015 · However, it does contain important information needed to uncover the secrets of ancient Egyptian technology—one which is almost invisible to the naked eye. This fragment has several vestiges of what resemble drill holes, cut at slightly different angles.
