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Thread: Hair Thin Cuts in a Metal Comb
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12th Jul 2020, 11:52 PM #16Novice
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13th Jul 2020, 12:06 AM #17Gear expert in training
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13th Jul 2020, 12:20 AM #18Novice
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There is this video on youtube that explains briefly at 0:55
It shows a circular saw but with some kind of oil...
https://www.youtube.com/watch?v=RXf924CGLbs
The comb I want to make doesn't need to be as small as the on in the picture.
I need a comb that works and has a way of doing it, if possible.
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13th Jul 2020, 01:01 AM #19
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13th Jul 2020, 01:28 AM #20China
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If you have a lathe or a mill you could use a slitting saw ,with appropriate custom fixture and coolant
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13th Jul 2020, 02:02 AM #21Novice
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1) The mechanism with the metal comb costs like 5 bucks, so I imagine that it's not a expensive or complex procedure to make all of those cuts.
Considering that, what could be the possible procedure used in making this small metal comb?
2) I don't need to make a really small comb like that, if the cuts needs to be wide, so be it. Whats procedure can I use considering that I need precision in those cuts?
In the video I mentioned before, they use some kind of circular saw with some oil to make the cut. Does anyone know that procudure and machine?
This is a pic of the video:
circular saw.jpg
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13th Jul 2020, 02:17 AM #22
Hi Frnnd, Guys,
That would be quite easy to do on the lathe, and you can get slitting saws of almost any thickness. I have some that are only 5 thou thick, but its very easy to strip the teeth off those or break them.
The slitting you have seen in that video is done under CNC control.Best Regards:
Baron J.
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13th Jul 2020, 09:19 AM #23Most Valued Member
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I don't think either of those metals are suitable for the comb. They are heat treated after cutting to give the ringing sound. Untreated steel would sound very dull.
This article talks about the combs being heated to 'glass hard' after cutting. I don't think you can achieve that with 1020.
https://www.thenakedwatchmaker.com/m...ened)%20twice.Chris
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13th Jul 2020, 11:21 AM #24Gear expert in training
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13th Jul 2020, 06:43 PM #25Senior Member
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A stack of slitting saws of the required thickness, with spacers between them.
Low revs - you approximate the speed of a hacksaw blade. Low feed rate to match.
The oil is to wash the swarf away, which can be crucial. Nothing like a jam.
I have done similar with a manual mill, and with a CNC. I use HSS, but you can get carbide.
Cheers
Roger
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13th Jul 2020, 07:07 PM #26Gear expert in training
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Not sure a stack would work with each slot being a different length...
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13th Jul 2020, 07:25 PM #27Senior Member
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each slot being a different length...
Oops!
Oh well, CNC with a single slitting saw, multiple cuts. It's just g-code ...
Cheers
Roger
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14th Jul 2020, 09:52 AM #28Novice
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Considering the comb in the picture is from a really cheap mechanism from China, there has to be a inexpensive way to do it.
I costs less than a dollar for just one entire mechanism.
https://www.aliexpress.com/item/10000133302865.htm
How can they make it so cheap considering that the comb is something more complex than the other parts?
Should be possible to do it with a plate of aluminum?
Thank you all for your answers!
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14th Jul 2020, 09:54 AM #29Gear expert in training
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14th Jul 2020, 10:26 AM #30Novice
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