PSN-L Email List Message

Subject: Re: SPREGNETHER HORIZONAL SEISMOMETER
From: Jim Hannon jmhannon@.........
Date: Thu, 05 Apr 2012 06:23:03 -0500


Is the hole in the end or the side of the brass stock? What sort of 
tools do you have for drilling?
Jim Hannon

On 4/4/2012 11:45 PM, JAMES C ALLEN wrote:
> I know that this is a long shot, but does anyone have parts for an old
> Spregnether horizontal seismometer? Specifically the lower wire hinge.
> The piece is a short wire with a round brass fitting at each end. I
> tried to make it myself using piano wire and round brass stock. But
> drilling the round brass stock to insert the wire into has been fraught
> with failure thus far since the very small drill bits I purchased at the
> hobby shop keep breaking, Also, any advice on drilling an approximately
> .030 diameter hole in round brass stock would also be appreciated. Do
> machine shops do this kind of work?
> James Allen

-- 
WB0TXL
WEB Page http://www.fmtcs.com/web/jmhannon/
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42,11.90N,91,39.26W

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