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4 Jaw Chuck Adaptor Plate For Lathe

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  • #16
    That square hollow section begged to be trued by the new lathe chuck. So I turned the revs down to 160rpm and feed rate was 0.05mm per pass. The tube was cut by a aluminium drop saw so only need 4 passes per end.
    Using a dial indicator was pretty confusing as I could not get it any closer than .05mm. Then I saw what was happening. The tube walls were deflecting inwards from the force of the chuck jaws.
    Oh well it was centred.

    worked better than expected.
    Ji
    Attached Files
    Grip it and Rip it

    Comment


    • #17
      Mounting plates are normally made from cast iron or steel because they are more stable than aluminum. Wondering why you didn't just chuck the 4 jaw in the 3 jaw? Have a 4 jaw that doesn't fit any of my lathes and use occasionally and that's how I grip it.

      Comment


      • #18
        Hi Just,
        Thermal expansion alters aluminium's dimensions that is for sure. I don't turn all day long or take large bits so my chuck and base plate don't really get hot, but just in case that does happen that is why I made the base plate so it needs some heat to even fit. After that it is just a spacer so aluminium should do fine as my machine does not spin real fast (max is 1600rpm).
        I have never had a 4 jaw chuck so did not think about holding it with the 3 jaw, great suggestion. My 3 jaw and 4 jaw weigh a bit, combined that is a fare old weight being supported by the bearings without the job weight spinning force or tool pressure. Have you ever had yours fly off or just fall onto the bed? What size 3 jaw chuck do you have in comparison to your 4 jaw?

        Ji
        Grip it and Rip it

        Comment


        • #19
          Truing the square hollow section yesterday took for ever. Mainly because I was fighting with the magnetic base holder. It was like trying to get someone to stand up that took a handful of sleeping tablets. Not wanting to go through that again I came up with a design for a jig to hold the dial indicator in the tool post.
          I found some scrap aluminium 20mm x 20mm 6061 square bar hanging around so off to the mill I went.

          Ji
          Attached Files
          Grip it and Rip it

          Comment


          • #20
            I don't have a slitting saw so I cut the compression gap with my band saw. Not to bad.
            It holds the indicator perfectly.
            No more fights or lost time.

            Ji
            Attached Files
            Grip it and Rip it

            Comment


            • #21
              Nicely made holder. I have to ask...why not just use your mill to true up the square tube?
              Miller 251...sold the spoolgun to DiverBill.
              Miller DialArc 250
              Lincoln PrecisionTig 275
              Hypertherm 900 plasma cutter
              Bridgeport "J" head mill...tooled up
              Jet 14 X 40 lathe...ditto
              South Bend 9" lathe...yeah, got the change gears too
              Logan 7" shaper
              Ellis 3000 band saw
              Hossfeld bender w/shopbuilt hyd.
              Victor Journeyman torch and gauges
              3 Gerstner boxes of mostly Starrett tools
              Lots of dust bunnies
              Too small of a shop at 40 X 59.

              Comment


              • #22
                Hi Roy,
                Exactly.
                The mill would have been better alround but it was the only square stock I had hanging around to test the new chuck.
                It needed squaring for another project and I found out I needed this indicator jig to use the chuck so it all worked out.

                Ji
                Grip it and Rip it

                Comment


                • #23
                  Makes sense in oh so many ways! Looks like it's about time to invest in a finger style indicator for your lathe work. I've a number of old lug back plunger indicators, but a finger style is so much easier to use on a tool post.


                  EDIT: Actually, I find a Noga brand mag base indicator holder invaluable.
                  Last edited by WyoRoy; 04-08-2013, 11:22 PM.
                  Miller 251...sold the spoolgun to DiverBill.
                  Miller DialArc 250
                  Lincoln PrecisionTig 275
                  Hypertherm 900 plasma cutter
                  Bridgeport "J" head mill...tooled up
                  Jet 14 X 40 lathe...ditto
                  South Bend 9" lathe...yeah, got the change gears too
                  Logan 7" shaper
                  Ellis 3000 band saw
                  Hossfeld bender w/shopbuilt hyd.
                  Victor Journeyman torch and gauges
                  3 Gerstner boxes of mostly Starrett tools
                  Lots of dust bunnies
                  Too small of a shop at 40 X 59.

                  Comment


                  • #24
                    Hi Roy,
                    I have one of those lever type indicators but for squaring square it only moves a little bit before end of travel while the dial type has heaps to avoid the corners. May be there is a better way but I have not been shown it.
                    Thanks Ji
                    Grip it and Rip it

                    Comment


                    • #25
                      If it works for you, that is the only thing that matters. I've been known to plop down a section of 1" flat stock across the lathe ways and sit a surface gauge on top to rough align stock in the chuck before bringing out the indicators.
                      Miller 251...sold the spoolgun to DiverBill.
                      Miller DialArc 250
                      Lincoln PrecisionTig 275
                      Hypertherm 900 plasma cutter
                      Bridgeport "J" head mill...tooled up
                      Jet 14 X 40 lathe...ditto
                      South Bend 9" lathe...yeah, got the change gears too
                      Logan 7" shaper
                      Ellis 3000 band saw
                      Hossfeld bender w/shopbuilt hyd.
                      Victor Journeyman torch and gauges
                      3 Gerstner boxes of mostly Starrett tools
                      Lots of dust bunnies
                      Too small of a shop at 40 X 59.

                      Comment


                      • #26
                        Hi Roy,
                        Have you got a stock stop for your mill.
                        When rounding the corners I marked a line on my vice so I could spin the part but have it align again without adjusting the X,Y,Z.

                        Ji
                        Grip it and Rip it

                        Comment


                        • #27
                          Originally posted by Jigantor View Post
                          Hi Roy,
                          Have you got a stock stop for your mill.
                          When rounding the corners I marked a line on my vice so I could spin the part but have it align again without adjusting the X,Y,Z.

                          Ji
                          Stock stop...no. I use either a clamp on jaw stop on the Kurt vise or wind down a long T-bolt on the table next to the vise and work with that for a reference.


                          You should be able to modify your new indicator holder to work on the mill table to catch the front edge of the work you need to mill to get the work piece indexed. See below...
                          Miller 251...sold the spoolgun to DiverBill.
                          Miller DialArc 250
                          Lincoln PrecisionTig 275
                          Hypertherm 900 plasma cutter
                          Bridgeport "J" head mill...tooled up
                          Jet 14 X 40 lathe...ditto
                          South Bend 9" lathe...yeah, got the change gears too
                          Logan 7" shaper
                          Ellis 3000 band saw
                          Hossfeld bender w/shopbuilt hyd.
                          Victor Journeyman torch and gauges
                          3 Gerstner boxes of mostly Starrett tools
                          Lots of dust bunnies
                          Too small of a shop at 40 X 59.

                          Comment


                          • #28
                            Hi Roy,
                            Wow is that your mill? Pretty cool stuff. I thought about bolting something into the tee slots. I was thinking about making a permanent stop fixed to the vice. Something to index a part from both sides of the vice.
                            Ji
                            Grip it and Rip it

                            Comment


                            • #29
                              No, not my mill...just a quick and dirty Google photo search result. Here's my old gal. Click image for larger version

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ID:	515649
                              Miller 251...sold the spoolgun to DiverBill.
                              Miller DialArc 250
                              Lincoln PrecisionTig 275
                              Hypertherm 900 plasma cutter
                              Bridgeport "J" head mill...tooled up
                              Jet 14 X 40 lathe...ditto
                              South Bend 9" lathe...yeah, got the change gears too
                              Logan 7" shaper
                              Ellis 3000 band saw
                              Hossfeld bender w/shopbuilt hyd.
                              Victor Journeyman torch and gauges
                              3 Gerstner boxes of mostly Starrett tools
                              Lots of dust bunnies
                              Too small of a shop at 40 X 59.

                              Comment


                              • #30
                                Still a good looking mill.
                                Well built machinery seems to work forever.
                                Ji
                                Grip it and Rip it

                                Comment

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