Re: [CAD_CAM_EDM_DRO] Tap burning EDM? Need it Quick and Dirty ;-)

Jerry Kimberlin wrote:

>jmkasunich wrote:
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>
>
>>It seems that anything simple that I can come up with will
>>require manual electrode feed. Is it practical to use
>>manual feed to burn out about 3/8" of a #8 tap? Or is slow,
>>smooth advance of the electrode too difficult to do?
>>
>>
>
>I don't think you could do it easily by hand in this lifetime
>:-). A more practical way might be to use a hand held vibratory
>engraving tool with an insulater chucked in it that can hold the
>electrode. Most of the big tap burners (and some small ones) are
>just a vibration device that sits there and jiggles. In your
>one-off tribulation, you could hand feed that into the tap. You
>could duct tape the engraving tool to a rod chucked into your
>drill press to hold it all steady. Kind of rube goldberg but it
>should work once and hopefully you'll not break another tap :-).
>
>JerryK
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I rmember an old book showing just such a device vibrating engraver
driving the tool (scrap metal rod about size of tap)
Bill Higdon