Thanks Brett.  If I can not find a shop to do it I may use your idea and 
spring for a drill press and buy an adapter chuck to try it myself.
Appreciate your suggestion
James Allen

-----Original Message----- 
From: Brett Nordgren
Sent: Thursday, April 05, 2012 6:31 AM
To: psnlist@..............
Subject: Re: SPREGNETHER HORIZONAL SEISMOMETER

Jim,

Here's a link to the kind of drill chucks they would use to drill
really small holes with a drill press or small lathe.

http://www.use-enco.com/CGI/INPDFF?PMPAGE=451

Those are rather expensive, though I suspect that you could find
lower quality versions for somewhat less.

Brett

At 12:45 AM 4/5/2012, you 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
>


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