o-ring groove in plate

Advert

o-ring groove in plate

Home Forums Beginners questions o-ring groove in plate

Viewing 11 posts - 1 through 11 (of 11 total)
  • Author
    Posts
  • #460211
    gerry madden
    Participant
      @gerrymadden53711

      Hi MEs,

      I have an aluminium plate 4.7mm thick and it has a 25mm dia hole in it. I would like to machine an O-ring groove (around 2 x2) in the bore of the 25 hole. What I imagine I need is a boring bar with a parting off bit coming off the bar at 90 degrees to its axis.

      I don't have time to make such a beast – even self isolation wont give me enough time to do all the jobs I have to do – so I'd like to buy one. Thing is, I can find on any of the popular sites anyone selling the thing that resembles what I think I need !

      Would anyone be able to point me in the correct direction ?

      dscn7508.jpg

      Gerry

      Advert
      #10135
      gerry madden
      Participant
        @gerrymadden53711
        #460213
        S.D.L.
        Participant
          @s-d-l

          PH Horn do them but they are Spendy.

          Steve

          #460215
          clogs
          Participant
            @clogs

            would have thought it'd be easy to make it urself…..

            nice peice of round bar say 14/15mm dia….and a modified broken drill shank at the least for the cutter……

            secured into a hole pre drilled into the shaft…..

            no need for complication….it's only ally….

            #460216
            JasonB
            Moderator
              @jasonb

              If you can swing it on the lathe then a bar like this would do, on the mill you could hold in themil spindle and rotate the work on a rotary table

              #460240
              old mart
              Participant
                @oldmart

                I have a couple like the one in Jason's post, 2mm and 3mm. They are the cheaper Chinese ones from ebay. They use the MGMN– inserts which are common and not propriety types. If using a mill boring head, then a ground down drill of the shank size to fit the head would work. If you have any parting off carbide inserts, then it would be possible to silver solder one to a steel shank to make a custom tool.

                Buying one at the moment from a UK supplier might be difficult.

                Edited By old mart on 27/03/2020 18:31:26

                #460247
                Oldiron
                Participant
                  @oldiron

                  So quick & simple to make from a piece of HSS or an old drill bit shank why would you buy one. As old mart says it may be difficult to get one delivered at the minute.

                  regards

                  #460248
                  Emgee
                  Participant
                    @emgee

                    If using a mill you could use a 20mm diam 2mm thick Woodruff cutter either with cnc or set-up on a rotary table.
                    You could of course also use the same cutting tool in the lathe with the plate mounted to a faceplate if you have enough swing.

                    Emgee

                    #460250
                    HOWARDT
                    Participant
                      @howardt

                      What is the purpose of the o-ring. Could it be held in a counterbore into one face.

                      #460434
                      gerry madden
                      Participant
                        @gerrymadden53711

                        Such things do exist ! Great. And now I know what they are correctly called I have been able to search more sensibly and I see even Cutwell advertise them. Thanks all for your assistance.

                        Howard, the plate is actually part of a small propeller hub. I'm actually building a balancer unit for it but didn't like the fact that the plate was a clearance fit on the mounting boss. This would lead to a loss of balance, not much if one does the maths, but I cant forget such things especially when it can so easily be mostly eliminated. The O-ring will allow assembly but help maintain concentricity until the bolts are tightened is probably the most elegant solution – in my mind at least .

                        Gerry

                        #460493
                        old mart
                        Participant
                          @oldmart

                          What about axially drilling three or four holes in the edge of the 25mm hole and inserting o ring material to help self centring?

                        Viewing 11 posts - 1 through 11 (of 11 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

                        Home Forums Beginners questions Topics

                        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