Radius Fixture

Advert

Radius Fixture

Home Forums Workshop Tools and Tooling Radius Fixture

Viewing 12 posts - 1 through 12 (of 12 total)
  • Author
    Posts
  • #648249
    Paul Lousick
    Participant
      @paullousick59116

      A video on Youtube showing the manufacture of a fixture for milling a radius. And as the operator in the video says, a bit over the top but he shows a lot of interesting machining techniques.

      radius fixture.jpg

      Advert
      #21011
      Paul Lousick
      Participant
        @paullousick59116
        #648253
        Thor 🇳🇴
        Participant
          @thor

          Nice fixture, I tend to use my rotary table. I guess this was the video.

          Thor

          #648256
          Michael Gilligan
          Participant
            @michaelgilligan61133

            Very impressive … but plenty of opportunities to make an expensive mistake.

            MichaelG.

            #648260
            DMB
            Participant
              @dmb

              Quite agree with MichaelG. Listen to intro. on video, hear producer saying he couldn't be bothered to hump heavy rotary table on to mill to do a rounding job. Then he goes to all that trouble to make what I think is a poor mans rotary table! He demonstrates a rough and ready linisher method, which if carefully done, will, in my opinion, be adequate for most purposes. An easier way of getting better results would be to have a leadscrew controlled slider with a number of interchangeable vertical pegs, one to fit hole in work. Slider would incrementally move peg nearer to sanding belt while moving the job by hand, around the peg.

              My thoughts are the whole idea is willy waving – "look what a clever machinist I am." Or am I missing something? Can't remember last time I was accused of being thick!

              #648264
              not done it yet
              Participant
                @notdoneityet

                I ‘potentially’ need to make some parts with precision curved sliding fits. I’ve never even considered doing it before now, but maybe if I could make this fixture, I might be able to attack such jobs with a tad more confidence. I await the vid on his results and usefulness, but somehow doubt I would manage anything to the precision he seems to set for himself.

                In summary, probably too good for my skill level – so it’s likely never to be followed up.🙂

                #648279
                Circlip
                Participant
                  @circlip

                  MEW did this in one of the early issues. Made mine in Stainless – cos I had access to it.

                  Regards Ian.

                  #648282
                  Bazyle
                  Participant
                    @bazyle

                    Looked at the first 20 seconds. May watch more this evening. However looks like he never heard of filing buttons though I admit the problem with them is you never have the right size or remember where you put them. I'm thinking nowadays they could be knocked out as single-use-plastic devil in a 3D printer.

                    #648292
                    Hopper
                    Participant
                      @hopper

                      Very similar in principle to the ungeared small rotary table designs of G H Thomas and Harold Hall, published in ME and MEW respectively.

                      But he missed the very simplest way of machining a radius on a corner or end of a rod that has a hole in it. You can hold a pin upright in the mill vice and slip the hole in the rod over the pin then hold the end of the rod to pivot it around while milling the radius with an end mill cutter.

                      Bit of a dodgy trick but sometimes used in jobbing shops where time is of the essence. And homeshops (like mine) where laziness rules. This video shows the principle: Actual machining starts about 00:40.

                      #648295
                      JasonB
                      Moderator
                        @jasonb

                        Apart from the lifting bit (is the new one much lighter? ) A sub table on his existing R/T and disengaging the screw would have done all that. Usually even room to add adjustable stops to a table that size

                        The loss of height from mounting it in a vice will be a big disadvantage for many a hobby mill user where they are often challenged for head room.

                        Edited By JasonB on 12/06/2023 12:18:18

                        #648299
                        Paul Lousick
                        Participant
                          @paullousick59116

                          A pin in the hole and held upright in a vice is what I normally do (if small enough to fit in the vice) and a touch up on a belt grinder to smooth. Otherwise clamped to a simple plate that is bolted to a rotary table. He did show a couple of good machining techniques like a trepanning tool and using masking tape and super glue to hold the work.

                          #648304
                          Hopper
                          Participant
                            @hopper

                            It's a lovely job he has made of it, and definitely easier to lift than the big rotary table. I have the two pieces of steel to make own version, a la Harold Hall, but they have been sitting on the bench for six years now. Ended up buying a little 75mm rotary table with worm and wheel and all for less than $100 so lost motivation to spend $1000 worth of time on making one.

                          Viewing 12 posts - 1 through 12 (of 12 total)
                          • Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

                          Advert

                          Latest Replies

                          Viewing 25 topics - 1 through 25 (of 25 total)
                          Viewing 25 topics - 1 through 25 (of 25 total)

                          View full reply list.

                          Advert

                          Newsletter Sign-up