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Racho.. And anyone else interested in solving a problem and not having an argument.

I got into the whole rock cutting thing and like you and speaking from a hell of a lot of experience I'm looking at stuff that can't have been copper tool made.. Period.
Problem is there's so much of it globally when you know what you're looking at.
So went back to basics and Petries drill core which Chris Dunn was so enamoured with.
Apart for the fact that the damn thing has no right to even exist, I read up everything Dunn and others had to say about its parameters. Striations, pitch, feed rate... yadda yadda. All of which I agreed with.
I noticed that its tapered, I don't have the measurments, but its not parallel.
So after several WTF moments I'm getting the impression that it's not rotary drilling. It looks like rotary tube drilling because its round with a circular witness mark at the bottom of the holes.
But it's tapered.
How can that be? how the hell do you rotary drill a tapered hole? producing a plug that's narrow at the top and a hole that's wide at the top. you know that if you slam a tapered shank into a tapered hole it siezes solid.
and anyway the plug tapers in the opposite direction. It's more obvious on the smaller holes meaning that the same process was used for large and small, the taper just represents a smaller percentage of the overall diameter in the big holes, so not so obvious.
so I forced myself to bin the idea of rotary drilling altogether.
So for me... Next in line, Percussion Drilling. I'll talk about that later.
let you have a go.



Edited 1 time(s). Last edit at 11-Apr-17 21:29 by Jon Ellison.

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Subject Views Written By Posted
Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 3172 Racho 02-Apr-17 18:38
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 860 Fsbirdhouse 02-Apr-17 20:05
Whoever operated this saw (2:30 min mark)...made a mistake 768 Racho 04-Apr-17 14:02
Re: Whoever operated this saw (2:30 min mark)...made a mistake 750 Fsbirdhouse 04-Apr-17 14:51
If on purpose... 331 Racho 14-Apr-17 05:01
Re: If on purpose... 378 Origyptian 14-Apr-17 05:32
Re: Whoever operated this saw (2:30 min mark)...made a mistake 641 Origyptian 07-Apr-17 13:28
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 632 SandyJesse 07-Apr-17 22:42
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 402 Fsbirdhouse 09-Apr-17 16:59
Re: B 4 : ) 599 Thunderbird 05-Apr-17 05:22
Re: B 4 : ) 575 Warwick 07-Apr-17 17:50
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 630 SandyJesse 07-Apr-17 01:30
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 733 Warwick 07-Apr-17 18:03
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 818 Jon Ellison 08-Apr-17 10:53
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 514 Warwick 08-Apr-17 17:57
if I carried out a test... 596 Racho 09-Apr-17 02:15
Re: if I carried out a test... 544 Jon Ellison 09-Apr-17 08:44
I did check it out :) 452 Racho 25-Apr-17 05:59
Re: I did check it out :) 353 Origyptian 25-Apr-17 14:22
Don't even need to stop to think on this... 334 Racho 25-Apr-17 15:37
Re: Don't even need to stop to think on this... 397 Thanos5150 25-Apr-17 17:20
I believe you are a copper/bronze tool proponent 333 Racho 25-Apr-17 18:07
Re: I believe you are a copper/bronze tool proponent 428 Thanos5150 25-Apr-17 19:49
Would you agree... 378 Racho 25-Apr-17 20:29
Re: Would you agree... 415 Thanos5150 25-Apr-17 21:07
Re: Would you agree... 402 Origyptian 25-Apr-17 22:54
...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 310 Racho 15-Oct-17 05:46
Re: ...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 240 Jon Ellison 15-Oct-17 14:26
precision cut at 7:08 min mark...interesting photo angle I haven't seen before 309 Racho 15-Oct-17 16:49
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 278 Jon Ellison 15-Oct-17 19:20
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 291 Jon Ellison 15-Oct-17 19:35
Re: ...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 295 Origyptian 16-Oct-17 03:27
Re: ...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 305 Jon Ellison 16-Oct-17 07:58
Re: ...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 269 Jon Ellison 16-Oct-17 09:19
Re: ...just a lot of similarities at the 36 second mark and super telltale machine markings at 9:30 min mark 552 Jon Ellison 16-Oct-17 11:03
an ancient quarry in France...same markings on side of a 'cliff' 82 Racho 20-Dec-19 20:04
Re: an ancient quarry in France...same markings on side of a 'cliff' 79 Martin Stower 20-Dec-19 23:47
? 67 Racho 21-Dec-19 01:25
Re: an ancient quarry in France...same markings on side of a 'cliff' 78 Open mind 21-Dec-19 02:03
Re: an ancient quarry in France...same markings on side of a 'cliff' 78 Thanos5150 21-Dec-19 04:19
Re: an ancient quarry in France...same markings on side of a 'cliff' 81 Open mind 21-Dec-19 05:07
Re: an ancient quarry in France...same markings on side of a 'cliff' 113 Thanos5150 21-Dec-19 16:25
Re: Would you agree... 604 Corpuscles 25-Apr-17 23:56
Re: if I carried out a test... 411 Warwick 09-Apr-17 15:39
Re: if I carried out a test... 456 Fsbirdhouse 09-Apr-17 22:34
Re: if I carried out a test... 368 Jon Ellison 09-Apr-17 23:20
could not have been 415 Warwick 10-Apr-17 15:34
Re: could not have been 421 Jon Ellison 10-Apr-17 16:18
Re: could not have been 459 Warwick 10-Apr-17 17:29
Re: could not have been 434 Jon Ellison 10-Apr-17 17:59
Re: could not have been 361 Warwick 10-Apr-17 18:48
Re: could not have been 368 Jon Ellison 10-Apr-17 19:18
Re: could not have been 385 Warwick 10-Apr-17 19:34
Re: could not have been 424 Jon Ellison 10-Apr-17 19:55
Re: could not have been 371 Warwick 11-Apr-17 17:29
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 398 Thanos5150 09-Apr-17 16:13
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 506 Warwick 09-Apr-17 16:42
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 415 Thanos5150 09-Apr-17 16:56
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 407 Warwick 09-Apr-17 17:21
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 470 Thanos5150 09-Apr-17 18:00
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 400 Warwick 09-Apr-17 18:06
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 427 Thanos5150 09-Apr-17 18:22
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 437 Warwick 09-Apr-17 18:31
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 414 Origyptian 09-Apr-17 20:02
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 474 Warwick 10-Apr-17 15:41
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 375 Jon Ellison 09-Apr-17 18:44
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 413 Warwick 09-Apr-17 19:03
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 399 Jon Ellison 09-Apr-17 19:17
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 427 Warwick 09-Apr-17 19:48
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 529 Jon Ellison 09-Apr-17 20:33
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 394 Warwick 10-Apr-17 15:53
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 472 Origyptian 09-Apr-17 20:06
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 499 Thanos5150 09-Apr-17 23:24
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 421 Origyptian 10-Apr-17 04:42
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 430 Jon Ellison 10-Apr-17 08:50
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 442 Origyptian 10-Apr-17 14:16
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 402 Thanos5150 10-Apr-17 15:25
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 377 Origyptian 10-Apr-17 15:44
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 434 Origyptian 10-Apr-17 14:44
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 407 Warwick 10-Apr-17 15:26
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 387 Origyptian 10-Apr-17 15:54
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 382 Warwick 10-Apr-17 16:01
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 436 Jon Ellison 10-Apr-17 16:23
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 411 Warwick 10-Apr-17 17:06
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 415 Jon Ellison 10-Apr-17 16:11
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 396 Warwick 10-Apr-17 17:23
I've come to recognize that I was wrong all along 554 Racho 08-Apr-17 16:54
Re: I've come to recognize that I was wrong all along 545 Warwick 08-Apr-17 18:23
Oranges and apples... 470 Racho 09-Apr-17 00:39
Re: Oranges and apples... 440 Warwick 09-Apr-17 15:59
Re: In plain sight 462 Thunderbird 10-Apr-17 19:53
It is in plain sight...or plane sight ;) 454 Racho 14-Apr-17 06:53
Re: It is in plain sight...or plane sight ;) 502 Thunderbird 15-Apr-17 01:31
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 431 Archae Solenhofen 09-Apr-17 16:47
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 422 Warwick 09-Apr-17 16:52
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 404 Origyptian 09-Apr-17 19:49
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 423 Warwick 09-Apr-17 19:53
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 404 Origyptian 09-Apr-17 20:09
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 487 Origyptian 09-Apr-17 19:49
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 499 Jon Ellison 09-Apr-17 19:59
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 410 Origyptian 09-Apr-17 20:26
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 416 Fsbirdhouse 10-Apr-17 15:26
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 413 Origyptian 10-Apr-17 15:46
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 457 Fsbirdhouse 10-Apr-17 18:45
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 423 Eddie Larry 10-Apr-17 18:49
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 401 Origyptian 10-Apr-17 18:50
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 428 Warwick 10-Apr-17 19:18
unless the cuts were being made very, very quickly... 386 Racho 11-Apr-17 06:22
Re: unless the cuts were being made very, very quickly... 496 Jon Ellison 11-Apr-17 09:27
Re: unless the cuts were being made very, very quickly... 297 Origyptian 11-Apr-17 19:32
Re: unless the cuts were being made very, very quickly... 451 Jon Ellison 11-Apr-17 19:38
Re: unless the cuts were being made very, very quickly... 291 Archae Solenhofen 11-Apr-17 14:11
Re: unless the cuts were being made very, very quickly... 404 Jon Ellison 11-Apr-17 14:27
Re: unless the cuts were being made very, very quickly... 386 Archae Solenhofen 11-Apr-17 14:49
Re: unless the cuts were being made very, very quickly... 369 Jon Ellison 11-Apr-17 15:27
Re: unless the cuts were being made very, very quickly... 374 Fsbirdhouse 11-Apr-17 15:53
Re: unless the cuts were being made very, very quickly... 440 Jon Ellison 11-Apr-17 15:55
Re: unless the cuts were being made very, very quickly... 445 Archae Solenhofen 11-Apr-17 16:35
Re: unless the cuts were being made very, very quickly... 255 Jon Ellison 11-Apr-17 16:49
Re: unless the cuts were being made very, very quickly... 284 Origyptian 11-Apr-17 19:54
once the mistake... 372 Racho 12-Apr-17 00:03
Re: unless the cuts were being made very, very quickly... 481 Thunderbird 12-Apr-17 04:20
Re: unless the cuts were being made very, very quickly... 317 Origyptian 12-Apr-17 13:14
Re: unless the cuts were being made very, very quickly... 453 Archae Solenhofen 11-Apr-17 17:31
Re: unless the cuts were being made very, very quickly... 375 Jon Ellison 11-Apr-17 18:17
Re: unless the cuts were being made very, very quickly... 365 Jon Ellison 11-Apr-17 18:26
Re: unless the cuts were being made very, very quickly... 445 Jon Ellison 11-Apr-17 18:43
Re: unless the cuts were being made very, very quickly... 369 Archae Solenhofen 12-Apr-17 14:43
Re: unless the cuts were being made very, very quickly... 380 Archae Solenhofen 11-Apr-17 18:41
Re: unless the cuts were being made very, very quickly... 418 Jon Ellison 11-Apr-17 18:45
Re: unless the cuts were being made very, very quickly... 325 Fsbirdhouse 11-Apr-17 18:48
Re: unless the cuts were being made very, very quickly... 407 Jon Ellison 11-Apr-17 19:00
Re: unless the cuts were being made very, very quickly... 331 Warwick 11-Apr-17 19:37
Re: unless the cuts were being made very, very quickly... 409 Jon Ellison 11-Apr-17 19:59
Re: unless the cuts were being made very, very quickly... 327 Warwick 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 391 Jon Ellison 11-Apr-17 20:34
Re: unless the cuts were being made very, very quickly... 428 Jon Ellison 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 321 Warwick 11-Apr-17 20:37
Re: unless the cuts were being made very, very quickly... 397 Jon Ellison 11-Apr-17 20:45
Re: unless the cuts were being made very, very quickly... 300 Warwick 12-Apr-17 17:24
science and technology...where minds come to meet 348 Racho 11-Apr-17 20:46
Re: science and technology...where minds come to meet 354 Jon Ellison 11-Apr-17 21:19
Re: science and technology...where minds come to meet 615 Archae Solenhofen 12-Apr-17 15:01
Re: science and technology...where minds come to meet 380 Warwick 12-Apr-17 17:52
43 second mark ...anyone care to take a crack at which tools were used? 395 Racho 12-Apr-17 20:20
Re: 43 second mark ...anyone care to take a crack at which tools were used? 478 Origyptian 12-Apr-17 21:34
and just after 30:30 min mark..china cave - chisels did this? 524 Racho 12-Apr-17 22:54
Re: and just after 30:30 min mark..china cave - chisels did this? 398 Warwick 13-Apr-17 17:15
taking sides...I suppose so but 423 Racho 14-Apr-17 04:18
beating the dead horse... 540 Racho 20-Apr-17 06:50
Re: Carved all this out with copper tools? Hell, I'll give em hardened steel and still scratch my head 573 Notinham 11-Apr-17 01:43


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