The nice thing about micrometer barrels is that that they
have more precise tolerances, bigger diameter threads and=20
a longer threaded contact area than a screw/nut=20
combination, so they will have much less radial play in the
shaft.  This makes anything you are supporting with them=20
more stable.  If you can avoid depending on the screw for
horizontal location of the piece you are supporting, that=20
might not be an issue.

Jack



-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@...............
On Behalf Of Charles R. Patton
Sent: Wednesday, October 19, 2005 12:48 AM
To: psn-l@..............
Subject: Re: good leveling screw source

I know Angel and others are talking about micrometers for leveling=20
screws -- but any micrometer I'm familiar with only has 40 TPI, not a=20
lot better than a 10/32 screw, and the screw is a lot cheaper, that's=20
why I suggested some of the metric screws with 0.25 pitch (101.6 TPI). =20
The laser adjustment screws are generally in the 80 TPI range with some=20
in the 100 TPI class, but they are generally $20 or more, whiile the=20
metric screws can be put together for a dollar or two.=20

Today I was talking to my machinist friend, and he gets  one inch=20
micrometers for $10 from
Industrial Tool Sales in Costa Mesa, California   Phone:   =20
949-631-1586.  These micrometers have tungsten faces and are made in=20
China.  They look great.  He may be getting a bit of a price break as=20
they buy a lot of tooling, but nevertheless, that is still a very low=20
price, and  is the lowest price I know of.

Regards,
Charles Patton

Larry P Thomas wrote:

>How about adapting (modifying) a cheap micrometer as an adjustment
screw.
>Should 100 tpi and would have a nice knurled handle to turn.  Just an
idea.
>It may not end up any cheaper.
>
>Later,
>Larry P. Thomas, wa0gwa
>
>Imagine it/Achieve it --- Dream it/Become it
>Larry P. Thomas,    wa0gwa    1 913 244-8761
>Krell Technologies    (http://www.krell.com)
>PO BOX  3565,  OLATHE,  KS  66063-3565   USA=20
>
> =20
>
>-----Original Message-----
>From: psn-l-request@..............
[mailto:psn-l-request@............... On
>Behalf Of Mark Robinson
>Sent: Tuesday, October 18, 2005 5:54 AM
>To: psn-l@..............
>Subject: Re: good leveling screw source
>
>Angel wrote:
> =20
>
>>Hello,
>>
>>I have spent a good hour looking on the web for some nice leveling
>>screws with no luck.  Does anyone on the list have a source.
>>
>>Something with a high thread count and a point so the thing does not
>>walk when you turn it.
>>   =20
>>
>
>Roger's post got my head working.
>
>Have a look at some old carburettors at a car wreckers.
>
>I was always impressed by the flame adjustment screws in old Bic Flic
>lighters, but they seem to be unobtanium in NZ these days.
>
>Mark
>
>__________________________________________________________
>
>Public Seismic Network Mailing List (PSN-L)
>
>To leave this list email PSN-L-REQUEST@.............. with=20
>the body of the message (first line only): unsubscribe
>See http://www.seismicnet.com/maillist.html for more information.
>
>__________________________________________________________
>
>Public Seismic Network Mailing List (PSN-L)
>
>To leave this list email PSN-L-REQUEST@.............. with=20
>the body of the message (first line only): unsubscribe
>See http://www.seismicnet.com/maillist.html for more information.
>
>
>
> =20
>

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