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Deeep Boring (job completed)

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  • Deeep Boring (job completed)

    The tube idea was nice, but too long of a wait and too much $'s for the minimums. I just finished the job on my Webb. I love a challenge like this... see http://bbs.homeshopmachinist.net//Fo...ML/004217.html

    First I milled a holder from 1" 6061 plate that bolted to my cross slide with a 4.25 id center hole. I tapped into the center 4 1/2" bolts, in order to center and hold the 4" stock. I centered and clamped the 4" bar stock into the holder with the outer end (tailstock removed) positioned in the steady rest. Indexed the whole thing to center.

    I then made a milling head with an M3 taper on it. Useing a 4' piece of 1.5" cold rolled steel with an M3 female end placed in the chuck I was able to first drill the part with a 2" bit and then bore it to size. The feed was done by the cross slide under power feeding the stock into the chuck. Every 2" I stopped and inserted an airgun extension through the spinde and beside the boring bar to clear chips. Then move the boring bar in the chuck as the hole progressed. I also ended up making several 3" od spacers that were locked to the boring bar every 10 inches with set screws to help center it while deep in the part (that made it tough to clear chips).

    I just knew there was a way. Just had to sleep on it a couple of nights...

    Stay Safe!
    Stay Safe

  • #2
    lotsa luck --

    Congratulations!

    And thanks for the "How I did it" technical lesson.

    John

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    • #3
      Dang,

      Did you take some pictures?
      Free software for calculating bolt circles and similar: Click Here

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      • #4
        Sounds like a great solution. The only problem is the difficulty in keeping the bore concentric to the workpiece. If you had been able to jig up a lathe bed extension you might have been able to turn the workpiece and it would have had that one important advantage. Of course now you have successfully done that job and I have not.

        Spence

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        • #5
          Reading a straight edge against the inside wall it looks like the runout is less than .125 which is way better than expected and not a problem for the application. The spacers helped with the alignment of the boring bar. I took some pics, but have not had luck getting them to upload to the column.
          Stay Safe

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          • #6
            lotsa luck, did you try Evans instuctions for posting photos? (found in Networking)
            To invent, you need a good imagination - and a pile of junk. Thomas A. Edison

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            • #7
              George,

              I haven't been able to get to photobucket for several days now. All I get is an Apache server test page. Are you seeing the same thing?
              Free software for calculating bolt circles and similar: Click Here

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              • #8
                Evan,
                Photobucket is working fine out here.
                To invent, you need a good imagination - and a pile of junk. Thomas A. Edison

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                • #9
                  George,

                  Would you do me a favour please? Open a DOS window and type in "tracert photobucket.com" at the prompt (no quotes). I would like to know what ip address photobucket.com resolves to at your end. The last line the tracert (Trace Route) command gives will be the ip address of the destination machine. From here it is 66.98.136.38

                  Also, would you try typing in that ip address in the address bar of IE and see what you get?

                  I have a feeling that the Telus DNS machine is hooped.
                  Free software for calculating bolt circles and similar: Click Here

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                  • #10
                    Evan,
                    I would really like to help you but I don't think that my computer skills are up to it. I don't know what a "DOS window" is.
                    To invent, you need a good imagination - and a pile of junk. Thomas A. Edison

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                    • #11
                      That's ok George. I have managed to determine that the phone company's DNS server is the problem and have reported it. With any luck it might be fixed this year.
                      Free software for calculating bolt circles and similar: Click Here

                      Comment


                      • #12
                        (Long time lurker, first time poster)

                        Another way to do a 'tracert' is to click 'Start', click 'Run' and then type in "tracert photobucket.com" (without the quote marks)

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                        • #13
                          The problem with that is the DOS box will close when tracert completes.
                          Free software for calculating bolt circles and similar: Click Here

                          Comment


                          • #14
                            Hit the 'Print Scrn' key, open a new email (or Wordpad), hit 'Edit and then 'Paste'. That'll give you a .jpg Screenshot.
                            Sometimes if I don't feel like cutting and pasting something, I'll use that to email it to myself.

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