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originally posted by: bluesfreak
As a machinist,I’ll answer for Purplemer.
On a Metalworking lathe we have various ‘Boring bars’ ( not Boring as in “this is boring” but BORING as in boring out a hole) and on woodworking lathes there are various methods and what are generally called ‘hollowing ‘ tools; hook shaped turning tools.
However Harte, being a former ME, you should know there is a huge difference between hand turning wood and Granite. A huge difference in pressure on the tool tip, and the forces involved.
originally posted by: bluesfreakFor these granite vases , I would surmise a VERY rigid lathe and tool holding set-up was required , and perhaps you could tell the class what kind of tip is required on the tool to perform the operation in the manner you suggest .
Back to Denys Stocks, no doubt?
No, it's perfectly clear that you haven't (or won't) acknowledge that exactly the same "problem" exists with the woodwork I linked. What's also clear is that you won't try and find out what kind of turning tool can make a hollow cut like that.
originally posted by: Phage
a reply to: bluesfreak
I fully acknowledge the high level of craftsmanship which you point out.
Better?
originally posted by: bluesfreak
And ps, Harte, your opinion on the perfection in the bowl that self balances please -in relation to the primitive fabrication method shown a reply to: Harte
originally posted by: bluesfreak
Here is MY suggestion for how that perfect curved bottom of the bowl was created, from someone who uses a lathe daily:
The outside shape is formed first; bowl, long neck, short neck, whichever you desire.
The inside is then drilled through, then bored out , or hollowed, using whichever method works best on this tough, pesky granite......
(snip)
If you did not, because the piece starts with the BASE end attached to the chuck end, as you came close to finish it, it would literally fly off the lathe ( you would be cutting it off!) before you could accurately turn the very last millimetres .
originally posted by: Harte
But lots of hollowing could be done fairly easily with just a straight shaft and sand, as long as the shaft had a significantly smaller diameter than the hole.
I certainly believe various jigs would have been used.
Harte
Two things: 1- The bowls aren't perfectly symmetric or balanced. 2- The problems you describe (flying off the lathe, etc) only occur if you're turning the object quickly.
If you're hand-cranking it, the problem is very minimal. ...and third, there's images of them working these bowls (a nice discussion with images from tombs and so forth on Reshfam) They aren't being done horizontally, but rather vertically. The lathe itself is turning, not the bowl/vase.
Other pieces turned out of granite, porphory or basalt are fully hollowed with narrow undercut flared openings, and some even have long necks. Since we have yet to reproduce such pieces it is safe to say that the techniques or machinery they employed to produce these bowls has yet to be replicated.
While metal chisels could be used to shape soft limestone, the metals available to the ancient Egyptians, copper, bronze and during the first millennium BCE wrought iron, were far too soft to work igneous rock.
originally posted by: purplemer
a reply to: Harte
Where in Sacred Geometry does one find information about the speed of light?
If you are intrested please go and have a read for yourself. Its good stuff. Could you answer my question for me please. Can you you show me how modern machines could replicate this ancient Egyptain granite jug. To me it seems like an impossible thing to do.
originally posted by: Hanslune
originally posted by: purplemer
a reply to: peacefulpete
These are not fringe ideas. This is our history and it is being kept hidden from us. Once upon a time acnient peeps all around the world decided to build massive pyramids and monoliths out of huge stone. Some of which weighing thousands of tonnes. The aligned these structures to very specific alignments. They then all just stopped.
it is evident there are links in culture. Thank you for your replies in this thread.
Extrtemely fringy unfortunately or if you wish alternative. Oh so whose hiding all this history from you?
Now lets get our facts straight one - exactly one statue weigh 1,000 tons everything else was less than that and very few very heavy stones were moved because it was really hard to do.
No they kept building but they found easier ways to build stuff - the amount of material in the Roman roads drafts the work on the great pyramid.
Once upon a time it was easier to cut a few large stones and move them but later they found it easier to cut and move smaller stones as technology improved.
Can you design a structure on earth that aligns to nothing? Given the sky above has thousands of moving dots you can line it up with something at some time. However they did line stuff up especially to sunset and sunrise on key days important to farmers.
originally posted by: bluesfreak
Harte takes quite a simplistic dismissive manner when replying to Purplemer , which implies a thorough knowledge of the subject of turning Granite bowls and vases, which cannot be the case, as Harte wasn’t there when the object was created. Harte can not tell us what kind of Lathe was used, Harte cannot tell us exactly what tooling was used, Harte cannot tell us how the bottom curved surface of the bowl was created on the lathe using his suggested method, yet implies to Purplemer that the answer is as simple and easy as turning a wood bowl on a wood lathe. It is not.
I notice you don’t pick up on any of my other points regarding accuracy, tool forces and the difference in behaviour between wood and stone, just simply pick up on my point of suggested ease of creation. impla reply to: Phage
originally posted by: purplemer
a reply to: Hanslune
You are denying a body of knowledge you don't know.
This is a supressed subject. You want to understand this learn from the Dogon.
originally posted by: purplemer
a reply to: Hanslune
Since Pharaohs in accordance to their religion have to be buried underground you have muted your own point. There is no exception to this rule. They where not burial chambers.
Damn right i can prove they are the burial chamber for Osirus. Historical legends stated that the well at the bottom lead to the burial chamber of Osisris and that he was buried on an island surrounded by water. Hey presto!
Lets see your evidence that this is Khufus pyramid.