RE: [gingery_machines] new article: The Intersection of Art and Precision (Using a Caliper)

 

Dave,

It sure sounds like you have mastered your art!

Rick

-----Original Message-----
From: gingery_machines@yahoogroups.com [mailto:gingery_machines@yahoogroups.com] On Behalf Of David Patterson
Sent: Wednesday, February 02, 2011 4:20 PM
To: gingery_machines@yahoogroups.com
Subject: RE: [gingery_machines] new article: The Intersection of Art and Precision (Using a Caliper)

Yes I'm turning freehand, largest diameter I've turned was 120" diam cylinder 18" long. that was +/- 1/16" in diam. I've also turned a 36" aluminum pipe flange pattern, by hand, that need to be within 1/32". Can I get closer with a compound? That would depend on the machine, probably not with the machines we had. For smaller diameters there is a technique to it that involves a rule, outside calipers, straight edge and a lathe parting tool. we then use a pi tape to verify the diameter, it can read to the .001".
http://www.newmantools.com/pi.htm

Dave Patterson

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