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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 3112 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 817 Fsbirdhouse 02-Apr-17 20:05
Whoever operated this saw (2:30 min mark)...made a mistake 753 Racho 04-Apr-17 14:02
Re: Whoever operated this saw (2:30 min mark)...made a mistake 722 Fsbirdhouse 04-Apr-17 14:51
If on purpose... 314 Racho 14-Apr-17 05:01
Re: If on purpose... 359 Origyptian 14-Apr-17 05:32
Re: Whoever operated this saw (2:30 min mark)...made a mistake 623 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 602 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 381 Fsbirdhouse 09-Apr-17 16:59
Re: B 4 : ) 574 Thunderbird 05-Apr-17 05:22
Re: B 4 : ) 552 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 601 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 713 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 793 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 490 Warwick 08-Apr-17 17:57
if I carried out a test... 578 Racho 09-Apr-17 02:15
Re: if I carried out a test... 525 Jon Ellison 09-Apr-17 08:44
I did check it out :) 413 Racho 25-Apr-17 05:59
Re: I did check it out :) 331 Origyptian 25-Apr-17 14:22
Don't even need to stop to think on this... 314 Racho 25-Apr-17 15:37
Re: Don't even need to stop to think on this... 375 Thanos5150 25-Apr-17 17:20
I believe you are a copper/bronze tool proponent 313 Racho 25-Apr-17 18:07
Re: I believe you are a copper/bronze tool proponent 408 Thanos5150 25-Apr-17 19:49
Would you agree... 358 Racho 25-Apr-17 20:29
Re: Would you agree... 395 Thanos5150 25-Apr-17 21:07
Re: Would you agree... 381 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 290 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 222 Jon Ellison 15-Oct-17 14:26
precision cut at 7:08 min mark...interesting photo angle I haven't seen before 290 Racho 15-Oct-17 16:49
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 258 Jon Ellison 15-Oct-17 19:20
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 273 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 275 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 288 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 249 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 523 Jon Ellison 16-Oct-17 11:03
an ancient quarry in France...same markings on side of a 'cliff' 72 Racho 20-Dec-19 20:04
Re: an ancient quarry in France...same markings on side of a 'cliff' 64 Martin Stower 20-Dec-19 23:47
? 57 Racho 21-Dec-19 01:25
Re: an ancient quarry in France...same markings on side of a 'cliff' 65 Open mind 21-Dec-19 02:03
Re: an ancient quarry in France...same markings on side of a 'cliff' 67 Thanos5150 21-Dec-19 04:19
Re: an ancient quarry in France...same markings on side of a 'cliff' 69 Open mind 21-Dec-19 05:07
Re: an ancient quarry in France...same markings on side of a 'cliff' 93 Thanos5150 21-Dec-19 16:25
Re: Would you agree... 581 Corpuscles 25-Apr-17 23:56
Re: if I carried out a test... 391 Warwick 09-Apr-17 15:39
Re: if I carried out a test... 437 Fsbirdhouse 09-Apr-17 22:34
Re: if I carried out a test... 351 Jon Ellison 09-Apr-17 23:20
could not have been 402 Warwick 10-Apr-17 15:34
Re: could not have been 402 Jon Ellison 10-Apr-17 16:18
Re: could not have been 434 Warwick 10-Apr-17 17:29
Re: could not have been 415 Jon Ellison 10-Apr-17 17:59
Re: could not have been 343 Warwick 10-Apr-17 18:48
Re: could not have been 347 Jon Ellison 10-Apr-17 19:18
Re: could not have been 366 Warwick 10-Apr-17 19:34
Re: could not have been 397 Jon Ellison 10-Apr-17 19:55
Re: could not have been 353 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 378 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 484 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 397 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 390 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 443 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 385 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 395 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 414 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 386 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 450 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 357 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 393 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 380 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 403 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 510 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 374 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 457 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 470 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 401 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 401 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 418 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 378 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 362 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 416 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 386 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 365 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 367 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 424 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 390 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 381 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 380 Warwick 10-Apr-17 17:23
I've come to recognize that I was wrong all along 533 Racho 08-Apr-17 16:54
Re: I've come to recognize that I was wrong all along 519 Warwick 08-Apr-17 18:23
Oranges and apples... 457 Racho 09-Apr-17 00:39
Re: Oranges and apples... 422 Warwick 09-Apr-17 15:59
Re: In plain sight 434 Thunderbird 10-Apr-17 19:53
It is in plain sight...or plane sight ;) 429 Racho 14-Apr-17 06:53
Re: It is in plain sight...or plane sight ;) 480 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 413 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 399 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 385 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 403 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 384 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 458 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 470 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 391 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 388 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 377 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 431 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 400 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 383 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 409 Warwick 10-Apr-17 19:18
unless the cuts were being made very, very quickly... 370 Racho 11-Apr-17 06:22
Re: unless the cuts were being made very, very quickly... 477 Jon Ellison 11-Apr-17 09:27
Re: unless the cuts were being made very, very quickly... 281 Origyptian 11-Apr-17 19:32
Re: unless the cuts were being made very, very quickly... 429 Jon Ellison 11-Apr-17 19:38
Re: unless the cuts were being made very, very quickly... 272 Archae Solenhofen 11-Apr-17 14:11
Re: unless the cuts were being made very, very quickly... 384 Jon Ellison 11-Apr-17 14:27
Re: unless the cuts were being made very, very quickly... 367 Archae Solenhofen 11-Apr-17 14:49
Re: unless the cuts were being made very, very quickly... 350 Jon Ellison 11-Apr-17 15:27
Re: unless the cuts were being made very, very quickly... 356 Fsbirdhouse 11-Apr-17 15:53
Re: unless the cuts were being made very, very quickly... 417 Jon Ellison 11-Apr-17 15:55
Re: unless the cuts were being made very, very quickly... 428 Archae Solenhofen 11-Apr-17 16:35
Re: unless the cuts were being made very, very quickly... 238 Jon Ellison 11-Apr-17 16:49
Re: unless the cuts were being made very, very quickly... 266 Origyptian 11-Apr-17 19:54
once the mistake... 358 Racho 12-Apr-17 00:03
Re: unless the cuts were being made very, very quickly... 459 Thunderbird 12-Apr-17 04:20
Re: unless the cuts were being made very, very quickly... 302 Origyptian 12-Apr-17 13:14
Re: unless the cuts were being made very, very quickly... 429 Archae Solenhofen 11-Apr-17 17:31
Re: unless the cuts were being made very, very quickly... 357 Jon Ellison 11-Apr-17 18:17
Re: unless the cuts were being made very, very quickly... 350 Jon Ellison 11-Apr-17 18:26
Re: unless the cuts were being made very, very quickly... 424 Jon Ellison 11-Apr-17 18:43
Re: unless the cuts were being made very, very quickly... 353 Archae Solenhofen 12-Apr-17 14:43
Re: unless the cuts were being made very, very quickly... 362 Archae Solenhofen 11-Apr-17 18:41
Re: unless the cuts were being made very, very quickly... 395 Jon Ellison 11-Apr-17 18:45
Re: unless the cuts were being made very, very quickly... 307 Fsbirdhouse 11-Apr-17 18:48
Re: unless the cuts were being made very, very quickly... 387 Jon Ellison 11-Apr-17 19:00
Re: unless the cuts were being made very, very quickly... 313 Warwick 11-Apr-17 19:37
Re: unless the cuts were being made very, very quickly... 390 Jon Ellison 11-Apr-17 19:59
Re: unless the cuts were being made very, very quickly... 311 Warwick 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 366 Jon Ellison 11-Apr-17 20:34
Re: unless the cuts were being made very, very quickly... 407 Jon Ellison 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 304 Warwick 11-Apr-17 20:37
Re: unless the cuts were being made very, very quickly... 378 Jon Ellison 11-Apr-17 20:45
Re: unless the cuts were being made very, very quickly... 283 Warwick 12-Apr-17 17:24
science and technology...where minds come to meet 336 Racho 11-Apr-17 20:46
Re: science and technology...where minds come to meet 334 Jon Ellison 11-Apr-17 21:19
Re: science and technology...where minds come to meet 591 Archae Solenhofen 12-Apr-17 15:01
Re: science and technology...where minds come to meet 361 Warwick 12-Apr-17 17:52
43 second mark ...anyone care to take a crack at which tools were used? 369 Racho 12-Apr-17 20:20
Re: 43 second mark ...anyone care to take a crack at which tools were used? 454 Origyptian 12-Apr-17 21:34
and just after 30:30 min mark..china cave - chisels did this? 501 Racho 12-Apr-17 22:54
Re: and just after 30:30 min mark..china cave - chisels did this? 380 Warwick 13-Apr-17 17:15
taking sides...I suppose so but 400 Racho 14-Apr-17 04:18
beating the dead horse... 515 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 555 Notinham 11-Apr-17 01:43


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