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2710Tramming Spec?

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  • Duncan McDonald
    Jun 3, 2002
      After reading here about tramming the head I decided to check my RF20. I used an Indicol with a DTI. I positioned the DTI at about 6" to one side of the head and set it to zero. I then rotated the head 180 degrees and took a reading. I got a 10 mil difference over 12". This is a lot higher than I would have thought. Did I use the right measurement technique? Is this kind of measurement typical? If I shim the column what should I be able to get the flatness/runout down to?
      -----Original Message-----
      From: philteague [mailto:philteague@...]
      Sent: Monday, June 03, 2002 1:56 PM
      To: mill_drill@yahoogroups.com
      Subject: [mill_drill] Running out of things to post

      Group members:

      Well, I guess everyone has just run out of things to say to the
      newsgroup. Not that I have anything particularly important to share.

      Over the weekend I spent more time than I should have on trying to
      made an indexable boring bar. This involves machining a V slot in the
      end of a 1/2" piece of drill rod so I could mount a TCMT32 carbide
      insert. I had thought that this would be something I could do and
      save myself anywhere from $20-50 over the price of a commercial
      boring bar. Well, it isn't quite as easy as I thought. I did manage
      to make a boring bar, but, it was not anything that I was sure would
      work very well. I tried again and the results were even less
      successful. I may just stick to the HSS insert boring bars (using my
      lathe) or the the boring head and carbide type boring bars using my
      mill/drill. If anyone has had any luck with making such a tool I
      would like to hear about it.

      Phil Teague

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