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Woodturning (rec.crafts.woodturning) To discuss tools, techniques, styles, materials, shows and competitions, education and educational materials related to woodturning. All skill levels are welcome, from art turners to production turners, beginners to masters. |
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#1
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drilling pencil lead on a lathe
ok he was not using a wood lathe but one could turn wood on this lathe if one wanted to he drilled a hole through a point 7 or point 9 mechanical pencil lead it was a competition and his competitor was using another technique that was more interesting and did not involve a lathe i think it was called edm or something like that it used an oil bath and electricty to drill into the lead the drill bit was an electrified probe where the electricity did all the work very precise and acccurate too iirc the edm shop buttered its bread doing fuel injector nozzles |
#2
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drilling pencil lead on a lathe
In article ,
Electric Comet wrote: i think it was called edm or something like that Electrical discharge machining. it used an oil bath and electricty to drill into the lead Also know as spark erosion. A well known technique for removing broken taps from metal. Depending on the capability required, they can be easy home-shop projects. -- Stuart Winsor Tools With A Mission sending tools across the world http://www.twam.co.uk/ |
#3
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drilling pencil lead on a lathe
On Tue, 01 Nov 2016 20:08:17 +0000 (GMT)
Stuart wrote: Electrical discharge machining. yes Also know as spark erosion. A well known technique for removing broken taps from metal. so that is how they do that Depending on the capability required, they can be easy home-shop projects. are there off the shelf units i had never heard of it but now will have to look some time in this competetion the operator could not see as it progressed but instead listend and watched the bubbles seems to work in a variety of material too steel aluminum and pencil lead wonder if it could be used in wood |
#4
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drilling pencil lead on a lathe
In article ,
Electric Comet wrote: On Tue, 01 Nov 2016 20:08:17 +0000 (GMT) Stuart wrote: Electrical discharge machining. yes Also know as spark erosion. A well known technique for removing broken taps from metal. so that is how they do that Depending on the capability required, they can be easy home-shop projects. are there off the shelf units Commercially yes but not at prices you or I would want to pay. i had never heard of it but now will have to look some time in this competetion the operator could not see as it progressed but instead listend and watched the bubbles seems to work in a variety of material too steel aluminum and pencil lead wonder if it could be used in wood I think it requires that the material be electrically conductive. I'm surprised it works with graphite (not because of it's conductivity but the nature of the material). I saw a simple one demonstrated at a model engineering show and the plans to build it were on a single sheet of A4 paper, I bought a set, and it wasn't tightly drawn. A second much more elaborate one was featured in "Model engineers workshop" (UK magazine) over two monthly parts. I've seen nice, intricate, patterns cut into razor blades. Hardened stainless steel and difficult to cut any other way because it's so hard and thin. -- Stuart Winsor Tools With A Mission sending tools across the world http://www.twam.co.uk/ |
#5
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drilling pencil lead on a lathe
On Tue, 01 Nov 2016 23:22:49 +0000 (GMT)
Stuart wrote: I think it requires that the material be electrically conductive. I'm surprised it works with graphite (not because of it's conductivity but the nature of the material). also what i thought there is a part two of the video that i have not seen the operator mentioned that 12mm deep is the critical point and that is where part two starts i think I saw a simple one demonstrated at a model engineering show and the plans to build it were on a single sheet of A4 paper, I bought a set, and it wasn't tightly drawn. A second much more elaborate one was featured in "Model engineers workshop" (UK magazine) over two monthly parts. will have to look for that I've seen nice, intricate, patterns cut into razor blades. Hardened stainless steel and difficult to cut any other way because it's so hard and thin. what i have seen so far was all small scale but i wonder if it is also used at large scale |
#6
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drilling pencil lead on a lathe
On Tuesday, November 1, 2016 at 2:05:38 PM UTC-4, Electric Comet wrote:
ok he was not using a wood lathe but one could turn wood on this lathe if one wanted to he drilled a hole through a point 7 or point 9 mechanical pencil lead it was a competition and his competitor was using another technique that was more interesting and did not involve a lathe i think it was called edm or something like that it used an oil bath and electricty to drill into the lead the drill bit was an electrified probe where the electricity did all the work very precise and acccurate too iirc the edm shop buttered its bread doing fuel injector nozzles It must be true...A keyboard with no punctuation keys...Why else would someone go thru the effort of typing 5 letters in lieu of 1 simple keystroke? |
#7
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drilling pencil lead on a lathe
On Tue, 1 Nov 2016 11:05:22 -0700
Electric Comet wrote: ok he was not using a wood lathe but one could turn wood on this lathe if one wanted to he drilled a hole through a point 7 or point 9 mechanical pencil lead was wrong on the diameter the winner drilled a 0.3 hole through a 0.5 lead on a lathe did not see what happened to the edm competitor but in part 1 he was concerned about the depth |
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