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Tail stock 3MT to 3MT extension

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  • Tail stock 3MT to 3MT extension

    I've been using an MT3 to MT3 extension on my tailstock. Works okay for far. Seems to be rigid enough for what I do. Thinking I making it a permanent arrangement. Freeze the extension and tap into the tail stock.

    Are there disadvantages to what I am doing ? Seems to work really well. Chucks are removed using a taper drift. Chucks and drills always lock into place.

    Has anyone else done something like this ?

    Last edited by TR; 05-07-2011, 11:49 PM.

  • #2
    I use a live center enough that I prefer the stiffness of a short tailstock. To the point that I crank it back to "0" as often as possible.



    • #3
      Deflection when subjected to a radial load. Maximum precision means turning between centres. Maximum precision requires maximum rigidity.

      A better question might be are there any advantages.


      Originally posted by TR
      Are there disadvantages to what I am doing ?


      • #4
        Why not move the tailstock?


        • #5
          If for some reason you frequently need extra reach with your tailstock, a better idea might be to convert yours into a capstan tailstock with a feed wheel on the front of the tailstock. A new tailstock quill can then be machined to be as long as you want.
          "I am, and ever will be, a white-socks, pocket-protector, nerdy engineer -- born under the second law of thermodynamics, steeped in the steam tables, in love with free-body diagrams, transformed by Laplace, and propelled by compressible flow."


          • #6
            Make a second longer quill out of pre-HT stuff..Fairly simple project and it only takes a minute or two to swap quills.


            • #7
              I'm going to assume your tired of cranking the crossfeed back out of the way for drilling.

              A long extension in the tailstock has problems. Even a long quill has some problems but is better than the extension.

              I don't have a problem with cranking the crossfeed back out of the way and sometimes I have to set the compound at 45 deg so everything will clear a live center in the tailstock.

              I hope your not using a live center AND the extension.
              It's only ink and paper