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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 2715 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 707 Fsbirdhouse 02-Apr-17 20:05
Whoever operated this saw (2:30 min mark)...made a mistake 634 Racho 04-Apr-17 14:02
Re: Whoever operated this saw (2:30 min mark)...made a mistake 633 Fsbirdhouse 04-Apr-17 14:51
If on purpose... 241 Racho 14-Apr-17 05:01
Re: If on purpose... 274 Origyptian 14-Apr-17 05:32
Re: Whoever operated this saw (2:30 min mark)...made a mistake 539 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 503 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 320 Fsbirdhouse 09-Apr-17 16:59
Re: B 4 : ) 501 Thunderbird 05-Apr-17 05:22
Re: B 4 : ) 452 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 510 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 639 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 711 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 395 Warwick 08-Apr-17 17:57
if I carried out a test... 503 Racho 09-Apr-17 02:15
Re: if I carried out a test... 457 Jon Ellison 09-Apr-17 08:44
I did check it out :) 348 Racho 25-Apr-17 05:59
Re: I did check it out :) 245 Origyptian 25-Apr-17 14:22
Don't even need to stop to think on this... 254 Racho 25-Apr-17 15:37
Re: Don't even need to stop to think on this... 308 Thanos5150 25-Apr-17 17:20
I believe you are a copper/bronze tool proponent 257 Racho 25-Apr-17 18:07
Re: I believe you are a copper/bronze tool proponent 320 Thanos5150 25-Apr-17 19:49
Would you agree... 281 Racho 25-Apr-17 20:29
Re: Would you agree... 330 Thanos5150 25-Apr-17 21:07
Re: Would you agree... 301 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 211 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 161 Jon Ellison 15-Oct-17 14:26
precision cut at 7:08 min mark...interesting photo angle I haven't seen before 218 Racho 15-Oct-17 16:49
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 198 Jon Ellison 15-Oct-17 19:20
Re: precision cut at 7:08 min mark...interesting photo angle I haven't seen before 214 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 200 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 206 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 185 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 427 Jon Ellison 16-Oct-17 11:03
Re: Would you agree... 484 Corpuscles 25-Apr-17 23:56
Re: if I carried out a test... 328 Warwick 09-Apr-17 15:39
Re: if I carried out a test... 381 Fsbirdhouse 09-Apr-17 22:34
Re: if I carried out a test... 288 Jon Ellison 09-Apr-17 23:20
could not have been 344 Warwick 10-Apr-17 15:34
Re: could not have been 338 Jon Ellison 10-Apr-17 16:18
Re: could not have been 364 Warwick 10-Apr-17 17:29
Re: could not have been 350 Jon Ellison 10-Apr-17 17:59
Re: could not have been 283 Warwick 10-Apr-17 18:48
Re: could not have been 278 Jon Ellison 10-Apr-17 19:18
Re: could not have been 307 Warwick 10-Apr-17 19:34
Re: could not have been 334 Jon Ellison 10-Apr-17 19:55
Re: could not have been 285 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 295 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 402 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 343 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 310 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 358 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 317 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 306 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 350 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 306 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 373 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 302 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 321 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 317 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 320 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 438 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 291 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 400 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 406 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 336 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 331 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 314 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 300 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 290 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 356 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 308 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 310 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 312 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 359 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 321 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 316 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 308 Warwick 10-Apr-17 17:23
I've come to recognize that I was wrong all along 453 Racho 08-Apr-17 16:54
Re: I've come to recognize that I was wrong all along 458 Warwick 08-Apr-17 18:23
Oranges and apples... 384 Racho 09-Apr-17 00:39
Re: Oranges and apples... 337 Warwick 09-Apr-17 15:59
Re: In plain sight 369 Thunderbird 10-Apr-17 19:53
It is in plain sight...or plane sight ;) 341 Racho 14-Apr-17 06:53
Re: It is in plain sight...or plane sight ;) 397 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 332 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 324 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 325 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 334 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 313 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 372 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 392 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 320 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 316 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 294 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 366 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 328 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 325 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 341 Warwick 10-Apr-17 19:18
unless the cuts were being made very, very quickly... 292 Racho 11-Apr-17 06:22
Re: unless the cuts were being made very, very quickly... 409 Jon Ellison 11-Apr-17 09:27
Re: unless the cuts were being made very, very quickly... 220 Origyptian 11-Apr-17 19:32
Re: unless the cuts were being made very, very quickly... 359 Jon Ellison 11-Apr-17 19:38
Re: unless the cuts were being made very, very quickly... 215 Archae Solenhofen 11-Apr-17 14:11
Re: unless the cuts were being made very, very quickly... 314 Jon Ellison 11-Apr-17 14:27
Re: unless the cuts were being made very, very quickly... 311 Archae Solenhofen 11-Apr-17 14:49
Re: unless the cuts were being made very, very quickly... 296 Jon Ellison 11-Apr-17 15:27
Re: unless the cuts were being made very, very quickly... 300 Fsbirdhouse 11-Apr-17 15:53
Re: unless the cuts were being made very, very quickly... 350 Jon Ellison 11-Apr-17 15:55
Re: unless the cuts were being made very, very quickly... 361 Archae Solenhofen 11-Apr-17 16:35
Re: unless the cuts were being made very, very quickly... 186 Jon Ellison 11-Apr-17 16:49
Re: unless the cuts were being made very, very quickly... 194 Origyptian 11-Apr-17 19:54
once the mistake... 292 Racho 12-Apr-17 00:03
Re: unless the cuts were being made very, very quickly... 389 Thunderbird 12-Apr-17 04:20
Re: unless the cuts were being made very, very quickly... 236 Origyptian 12-Apr-17 13:14
Re: unless the cuts were being made very, very quickly... 353 Archae Solenhofen 11-Apr-17 17:31
Re: unless the cuts were being made very, very quickly... 301 Jon Ellison 11-Apr-17 18:17
Re: unless the cuts were being made very, very quickly... 292 Jon Ellison 11-Apr-17 18:26
Re: unless the cuts were being made very, very quickly... 357 Jon Ellison 11-Apr-17 18:43
Re: unless the cuts were being made very, very quickly... 274 Archae Solenhofen 12-Apr-17 14:43
Re: unless the cuts were being made very, very quickly... 280 Archae Solenhofen 11-Apr-17 18:41
Re: unless the cuts were being made very, very quickly... 313 Jon Ellison 11-Apr-17 18:45
Re: unless the cuts were being made very, very quickly... 245 Fsbirdhouse 11-Apr-17 18:48
Re: unless the cuts were being made very, very quickly... 319 Jon Ellison 11-Apr-17 19:00
Re: unless the cuts were being made very, very quickly... 240 Warwick 11-Apr-17 19:37
Re: unless the cuts were being made very, very quickly... 317 Jon Ellison 11-Apr-17 19:59
Re: unless the cuts were being made very, very quickly... 233 Warwick 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 298 Jon Ellison 11-Apr-17 20:34
Re: unless the cuts were being made very, very quickly... 326 Jon Ellison 11-Apr-17 20:29
Re: unless the cuts were being made very, very quickly... 228 Warwick 11-Apr-17 20:37
Re: unless the cuts were being made very, very quickly... 292 Jon Ellison 11-Apr-17 20:45
Re: unless the cuts were being made very, very quickly... 220 Warwick 12-Apr-17 17:24
science and technology...where minds come to meet 256 Racho 11-Apr-17 20:46
Re: science and technology...where minds come to meet 255 Jon Ellison 11-Apr-17 21:19
Re: science and technology...where minds come to meet 508 Archae Solenhofen 12-Apr-17 15:01
Re: science and technology...where minds come to meet 297 Warwick 12-Apr-17 17:52
43 second mark ...anyone care to take a crack at which tools were used? 307 Racho 12-Apr-17 20:20
Re: 43 second mark ...anyone care to take a crack at which tools were used? 378 Origyptian 12-Apr-17 21:34
and just after 30:30 min mark..china cave - chisels did this? 413 Racho 12-Apr-17 22:54
Re: and just after 30:30 min mark..china cave - chisels did this? 325 Warwick 13-Apr-17 17:15
taking sides...I suppose so but 322 Racho 14-Apr-17 04:18
beating the dead horse... 422 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 483 Notinham 11-Apr-17 01:43


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