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Saw blades(Tungsten electrodes?)




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From:  Edward J. Wingate [SMTP:ewing7-at-frontiernet-dot-net]
Sent:  Friday, March 20, 1998 6:28 PM
To:  Tesla List
Subject:  Re: Saw blades(Tungsten electrodes?)

Tesla List wrote:
> 
> ----------
> From:  Homer Lea [SMTP:HomerLea-at-aol-dot-com]
> Sent:  Thursday, March 19, 1998 7:29 PM
> To:  tesla-at-pupman-dot-com
> Subject:  Saw blades(Tungsten electrodes?)
> 
> >         I have not built a rotary yet but have studied their design.  They
> >  are EXTREMELY DANGEROUS devices, especially if you spin them up over 5000
> >
> I have not built a rotary yet either. I am going to try to use some large
> (industrial) saw blades. I have a bunch of large blades, many tungsten carbide
> tipped and I fogure they should be pretty sturdy. If anyone has already tried
> this with disasterous results, please let me know.
> 
> jim heagy

Jim,

I built a rotor for a gentleman in Queensbury, N.Y. out of a carbide
tipped sawblade some time ago, but I don't know if he ever used it. It
looked kind of dangerous to me and I highly recommended a substantial
guard for it. The same caution applies for carbide tipped saw blades as
applies to the tungsten tipped contacts available at welding supply
stores. If they are overheated the braze can melt and release flying
carbide! There is also that pesky problem of isolating the blade from
the motor shaft. But, with proper precautions they should work in lower
powered systems. 

Safe coiling,

Ed Wingate