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Re: Ball bearings
Tesla List wrote:
>
> Original Poster: Neon John <johngd-at-bellsouth-dot-net>
>
> Tesla List wrote:
> >
> > Original Poster: "E.Seekins" <seeked-at-sover-dot-net>
> >
> > Terry Fritz <twftesla-at-uswest-dot-net wrote:
> > snip
> > >I may end up using ball bearing electrodes to get a much
> > >more stable firing voltage for the safety gaps. I assume cobalt drill
bits
> > >will cut through ball bearings to mount the shafts that hold them?...
> > snip
> >
> > Hi Terry, etc.
> > You're probably already aware of these, but just in case:
> > You can get "tooling balls" in a myriad of sizes already mounted to various
> > shafts with threaded ends (and some of the shafts do have a pretty stylish
> > faceted look to add visual impact (!)).
>
> True. Of course if one just HAS to machine a hole in a ball
> bearing, the only way to do it in the hobby shop is EDM. Every
> teslaphile should know about EDM. After all, we already have just
> about everything needed. HV tranny, cap, wire, etc.
>
> John
>
> --
> John De Armond
> johngdSPAMNOT-at-bellsouth-dot-net
> Neon John's Custom Neon
> Cleveland, TN
> "Bendin' Glass 'n Passin' Gas"
For the record, I have tried annealing bearing balls with the intent of
drilling them. The project was a total failure! Think the EDM would
work well, but didn't think it was a high-voltage proposition. Details
please? Think Lindsay has a book on EDM, and should probably pick it
up. By the way, the first time I heard of EDM was when I visited a
Soviet trade exhibit in Los Angeles, at least 40 years ago. They had an
automatic-feed EDM machine running. Some more recent experiences
haven't been so good, but the problem was not with the EDM but with the
idiots who goofed their design and tried to salvage things by running
EDM wires through a piece which was much too thick.
Ed