Gary,

Your  suggestion of using a pin vise to hold a very small drill bit and
then in turn chucking the pin vise in a drill press chuck is a great one.

On Thu, Apr 5, 2012 at 10:58 AM, Gary Lindgren wrote:

> James,****
>
> You received lots of answers and here is a couple more hints. I used a pin
> vice to hold the small drill bits. McMaster-Carr http://www.mcmaster.com  is
> a good place to get everything you need at good prices and fast shipping. A
> drill press is required to drill small holes. You can get drills that go
> down to .010" or smaller. The pin vice is used to hold these small drill
> bits and then you mount the pin vice in the drill vice. The drill press
> will probably have run-out and it will look as if that small bit is going
> all over the place. But just lower the drill slowly and aim for the center
> punch mark and the drill bit will straighten right up (hopefully). Then
> slowly drill into the brass.****
>
> Good luck,****
>
> Gary****
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> ** **
>
> *From:* psnlist-request@.............. [mailto:
> psnlist-request@............... *On Behalf Of *JAMES C ALLEN
> *Sent:* Wednesday, April 04, 2012 9:45 PM
>
> *To:* psnlist@..............
> *Subject:* Re: SPREGNETHER HORIZONAL SEISMOMETER****
>
> ** **
>
> 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****
>
>  ****
>
Gary,

Your=A0 suggestion of using a pin vise to hold a very small dr=
ill bit and then in turn chucking the pin vise in a drill press chuck is a =
great one.

On Thu, Apr 5, 2012 at 10:58 A=
M, Gary Lindgren <gel@.................> wrote:

James,=

You received lots of answ=
ers and here is a couple more hints. I used a pin vice to hold the small dr=
ill bits. McMaster-Carr http://www.mcmaster.com=A0 is a =
good place to get everything you need at good prices and fast shipping. A d=
rill press is required to drill small holes. You can get drills that go dow=
n to .010" or smaller. The pin vice is used to hold these small drill =
bits and then you mount the pin vice in the drill vice. The drill press wil=
l probably have run-out and it will look as if that small bit is going all =
over the place. But just lower the drill slowly and aim for the center punc=
h mark and the drill bit will straighten right up (hopefully). Then slowly =
drill into the brass.
Good luck,<=
/span>
Gary<=
/u>

=A0<=
/p>
=A0
=A0<=
/p>
=A0
=A0<=
/p>
=A0
=A0<=
/p>

From: psnlist-reques=
t@.............. [mailto:psnlist-request@..............] On Behalf Of <=
/b>JAMES C ALLEN

Sent: Wednesday, April 04, 2012 9:45 PM
=

To: =
psnlist@..............
Subject: Re: SPREGNETHER HORIZONAL SEI=
SMOMETER

=A0
I know that this is a long shot, but does anyone have=
 parts for an old Spregnether horizontal seismometer?=A0 Specifically the l=
ower wire hinge.=A0 The piece is a short wire with a round brass fitting at=
 each end.=A0 I tried to make it myself using piano wire and round brass st=
ock.=A0 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,=A0 Also, any advice on drilling an approxi=
mately .030 diameter hole in round brass stock would also be appreciated.=
=A0 Do machine shops do this kind of work?
James Allen
=A0