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Spin Fixture for the Surface Grinder

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  • #16
    Nice job on the “Spinner”. I have been looking for either of the Suburbans or a Harig at auction but they command a hefty price. Have thought of possibly making one, yours is proof it can be executed well. Good idea with the face plate mounting. I like that you can put different fixtures on the unit.

    Using a stepped flange with a light press and fasteners instead of welding for attaching the face plate to the shaft might have been a nicer interface, I personally don’t like to weld on precision parts.


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    • #17
      Originally posted by MillNut View Post
      Nice job on the “Spinner”. I have been looking for either of the Suburbans or a Harig at auction but they command a hefty price. Have thought of possibly making one, yours is proof it can be executed well. Good idea with the face plate mounting. I like that you can put different fixtures on the unit.

      Using a stepped flange with a light press and fasteners instead of welding for attaching the face plate to the shaft might have been a nicer interface, I personally don’t like to weld on precision parts.


      Sent from my iPhone using Tapatalk
      Thanks, I wasn't worried about the welding as I was planning to clean up the faceplate after they were attached. Put it back in the 4 jaw and cut about 10 thou off the face to get it back true again.

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      • #18
        Originally posted by mattthegamer463 View Post
        If it don't fit in my bench vise, it don't get pressed
        Don't own a heavy hammer???

        -D
        DZER

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        • #19
          Originally posted by bborr01 View Post
          .003 would be a lot of press for a shaft that size.
          That is kind of the idea.

          Actually any time you specify a dimension for a press fit,
          you should of course include a tolerance and a surface
          finish call out, but this is HSMing.

          -D
          Last edited by Doozer; 06-20-2019, 12:15 PM.
          DZER

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          • #20
            Originally posted by Doozer View Post
            Don't own a heavy hammer???

            -D
            Can't tell if you're joking.

            Sent from my SM-G960W using Tapatalk

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            • #21
              Heck no I am not joking.
              Make due with what you have.
              What makes you think so??

              -D
              DZER

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              • #22
                Heat up the flange it will go in easy..

                Btw , I am not sure how they remove shrunk in tooling for cnc mills ?

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                • #23
                  They heat the toolholders with an induction heater (magnetically)
                  and the tooling is carbide, so there is a differential expansion.

                  -D
                  DZER

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                  • #24
                    Originally posted by Doozer View Post
                    Heck no I am not joking.
                    Make due with what you have.
                    What makes you think so??

                    -D
                    I did make due, with a welder. A big hammer seems more severe to me.

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                    • #25
                      This thing is turning a bad taper and I realized it must be due to the base front face, it's never been aligned to the faceplate. I bolted it to a angle block, put a 123 block on the faceplate and ran an indicator around it finding it square vertically from the base within half a thou (this was ground in) and adjusted so it was reading well in both directions.

                      Ready to go but grinding it tomorrow as I want to watch Battlebots before bed.



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                      • #26
                        Originally posted by mattthegamer463 View Post
                        This thing is turning a bad taper and I realized it must be due to the base front face, it's never been aligned to the faceplate. I bolted it to a angle block, put a 123 block on the faceplate and ran an indicator around it finding it square vertically from the base within half a thou (this was ground in) and adjusted so it was reading well in both directions.

                        Ready to go but grinding it tomorrow as I want to watch Battlebots before bed.



                        Sent from my SM-G960W using Tapatalk
                        Where do you watch battle bots?

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                        • #27
                          Originally posted by RB211 View Post
                          Where do you watch battle bots?

                          Sent from my SM-G950U1 using Tapatalk
                          The internet, as I don't have cable. There's a few different ways to get the episodes.

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                          • #28
                            Originally posted by mattthegamer463 View Post
                            The internet, as I don't have cable. There's a few different ways to get the episodes.

                            Sent from my SM-G960W using Tapatalk
                            I'd like to watch them. Also, have you seen Stefan's videos on cylindrical grinding on his surface grinder? He made a nice setup for doing it.
                            https://youtu.be/VatTwmi0vgY

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                            • #29
                              I did, its a nice setup for grinding vetween centres. I have iton my to-do list but its pretty far down at the moment. I have a Starrett indicator stand, smaller than his but it eould work well in a similar setup.

                              You can see a lot of the current reboot's fights on Youtube. They're currently airing the 4th season after the reboot in 2015. They're pretty light on technicals as you can expect for a cable TV program.

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