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guess what cutting tool made this cut

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  • guess what cutting tool made this cut

    I just finished up in the shop, and I was surprised at how smooth this surface turned out. Take your best guess at what cutting tool produced this surface finish. For reference the part is 7075-T6 1.5" wide by 2" long.

    -Dan S.
    dans-hobbies.com

  • #2
    Shaper?

    Dave
    Just south of Sudspumpwater UK

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    • #3
      cutting tool or machine?

      Looks like a face mill with the head out of tram.

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      • #4
        It's a shaper. There are slight parallel lines running the long direction of the part. Not a bad finish but much more can be done.

        7075-T6 will produce mirror finishes with the right tooling. It's very hard, about 20% harder than mild steel. It's the one type of aluminum where the swarf cuts you.

        Shapers can produce some interesting finishes.

        Here are some examples on steel:

        This first is the finish from a regular finish cut in mild steel.



        Next we have some fancier finishes.





        Free software for calculating bolt circles and similar: Click Here

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        • #5
          Amazing finish on those parts Evan, how did you get them so white you cannot even see them on the screen???
          Precision takes time.

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          • #6
            Must be your new internet filter system in operation. They show up fine here.
            Free software for calculating bolt circles and similar: Click Here

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            • #7
              I cleared the cache but still nothing shows..The filter must have classified it as pr0n..
              Precision takes time.

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              • #8
                Try this. I made one change that might disclose how the filter works.

                Free software for calculating bolt circles and similar: Click Here

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                • #9
                  I'd say a slab mill on a horizontal milling machine.
                  Jonathan P.

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                  • #10
                    Since Dan is the proud new owner of a US Machines vertical mill, I would guess that is what he used to produce that finish. A properly trammed vertical mill with a sharp cutter is quite capable of producing a very nice finish.

                    If I had to guess which specific cutter he used, I would go with either a fly cutter or face mill.
                    Jim H.

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                    • #11
                      I dunno, it almost looks like it has three facets to it like it was cut in three passes. Then again it also has a straight grain or brushed surface on top of those facets. Almost looks to be finished with an in line sander.
                      I know I've obtained some really nice finishes on steel using of all things, a random orbit sander.
                      Home, down in the valley behind the Red Angus
                      Bad Decisions Make Good Stories​

                      Location: British Columbia

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                      • #12
                        The finish isn't consistent with a rotating face cutter. I enhanced the image and it could be a slabbing cutter or a shaper.

                        Last edited by Evan; 01-22-2009, 09:35 AM.
                        Free software for calculating bolt circles and similar: Click Here

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                        • #13
                          Side cut on an end-milling cutter?

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                          • #14
                            Horizonal mill with a cutter as wide as the marks indicate???
                            It's only ink and paper

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                            • #15
                              Ok I'm off to work, but just wanted to say it wasn't done on a mill or a shaper. I'll check in during lunch and give you the answer, I think you'll all be surprised what tool actually made the cut.
                              -Dan S.
                              dans-hobbies.com

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