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I see granite blocks in ancient Egyptian temples with perfect holes drilled into them. The historians say at that time (2500BC) they did not possess iron tools or the wheel and certainly no electricity. The most capable metal tool was made of copper.

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One theory suggests that a two-man saw with a flat copper blade was used to make horizontal cuts in granite by throwing sand at the cut line; the silicon quartz pushed by the blade make cutting granite possible. But this process yields something like a 1/2 inch deep cut after many hours of sawing (impractical).

I assume they may have employed a copper hole-saw or tube-like tool using the above method. But it still seems very tedious and impractical.

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  • $\begingroup$ The cutting is as you describe , it just requires a bunch of people and time. $\endgroup$ – blacksmith37 Nov 28 '20 at 16:51
  • $\begingroup$ The extra-terrestrials used lasers to do it for them, check out some of the literature... $\endgroup$ – Solar Mike Nov 28 '20 at 16:52
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    $\begingroup$ People today have relatively low level of patience because human labour is the most expensive thing in the world. But in aincent times things were in reverse, labour was cheap, and resources expensive. A lot of things change once you understand that they could probably employ teams of people for simple tasks like this. Having thousands of people toiling on stuff like this wasnt a problem. $\endgroup$ – joojaa Nov 28 '20 at 17:06
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They had jeweled points set into bronze tube drills. Artisans used generations of experience and secret grinding methods with a good knowledge of metallurgy.

This is a related article old Egypt drilling methods

"In 1996, this tube-drilled piece of granite was on display in the Cairo Museum"

Cairo museum art

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  • $\begingroup$ Secret grinding method? $\endgroup$ – Samid Apr 9 at 13:04

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