Hi Don, I am an Old Timer and the process you describe will not gain you anything except dropping the chuck key from one side.
I center parts on my lathe to 0.0001" all day long in a few seconds with my 4 jaw chuck. Short Parts: Mount the part in the jaws as close to center as you can. Indicate the part and set the indicator on "0" at the lowest reading. Rotate the part to the highest reading, divide that by 2 Rotate the part to the middle reading and set the indicator to "0" Rotate the part so one jaw is lined up with the indicator and move the part till it is on "0" Rotate the part 90° and repeat. Alternately tighten each jaw as tight as needed and end up on "0" Once I started using this method I don't even put the 3 jaw chuck on any more. Long Parts as described the other day. John On 20 Oct 2007 at 17:56, [EMAIL PROTECTED] wrote: > I read somewhere that the Old Timers used two wrenches on a four jaw > wrench, hand rotating the spindle by 90 degrees with both wrenches > inserted. They would loosen one and tighten the other until they got > the indicator dead on concentricity. So, go make yourself a second > chuck wrench. > > 73, Don... ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
