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25720Re: Is the G0704 a good mill?

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  • wturchyn
    Mar 1, 2013
      I don't have one of these G0704 mills, but I WANT one!
      Versions of this mill also available from:
      www.machinetoolswarehouse.com
      www.machinetoolonline.com


      --- In GrizHFMinimill@yahoogroups.com, Dale E <dalee1002000@...> wrote:
      >
      > Hi,
      >
      > Few owners complain about rigidity problems with the 704, at least far
      > fewer than Seig owners. Hence, there isn't really any info on stiffening
      > out there. Whether this is due to materials mostly used or other factors,
      > can be open to debate. It is probably a 'your mileage may vary' thing.
      >
      > How you set up a part to mill will greatly affect stiffness. The object is
      > to keep tooling and spindle as short as possible. So I try very hard to
      > keep parts as low to the table as possible to keep the head to the bottom
      > of the column. I also drop the head to do roughing cuts and then use the
      > spindle fine feed for final finishing cuts.
      >
      > As I said, I can get a 3/4" endmill to take .100" full width cut in mild
      > steel with no problems at a 1" to 1 1/2" inch per minute feed rate. But I
      > do pay attention to making the best set up I can. After that, it's a matter
      > of how fast you think you need to move metal. Need to do it fast? You will
      > need to more mass and power. If you have time, like most hobbyists have,
      > then you can afford to go slower.
      >
      > Fly cutters are really only meant for light finishing cuts, of .020" or
      > less. They can even make a full sized mill hammer. Biggest problem with
      > such cutters is lack of torque at low speeds. And not rigidity.
      >
      > Dale
      >
      >
      > On Fri, Mar 1, 2013 at 7:42 AM, Jeremy Winder <cptwinder@...> wrote:
      >
      > > **
      > >
      > >
      > > Thank you for the reply.
      > >
      > > As for what I'm going to use it for, I'm not really sure myself. The
      > > projects I currently have in mind fit the work envelope with room to spare
      > > and are mostly aluminum. However, I discovered with my 7x10 lathe, once I
      > > have a capability I find more and more projects to do. And them seem to get
      > > bigger and bigger.
      > >
      > > Can I assume from your comments that that G0704 does have a rigidity
      > > problem when cutting steel? Can this be overcome by stiffening the column
      > > and/or shallower cuts? Is the issue in the column or in the bed as well?
      > >
      > > Thanks again,
      > >
      > > Jeremy
      > >
      > >
      > >
      >
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