triple start tap die

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triple start tap die

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Viewing 19 posts - 1 through 19 (of 19 total)
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  • #17686
    capnahab
    Participant
      @capnahab
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      #187280
      capnahab
      Participant
        @capnahab

        Does anyone know where to purchase specialist taps ?.

        I need a triple metric 12mm x 0.75 , – its for a pen top. The specialist pen turner suppliers in the US but can't find anyone in the UK.

        Edited By capnahab on 21/04/2015 20:23:22

        #187285
        Roderick Jenkins
        Participant
          @roderickjenkins93242

          Sorry, just noticed the triple start!

          Rod

          Edited By Roderick Jenkins on 21/04/2015 20:22:27

          #187286
          JasonB
          Moderator
            @jasonb

            Rod, its a triple start one that he is after, not even Tracy's have them

            #187288
            Roderick Jenkins
            Participant
              @roderickjenkins93242

              8 seconds too slow in editingblush

              #187289
              capnahab
              Participant
                @capnahab

                sorry , my fault , should have put it in body, have done so now. Some of the penturners forms have had group buys for a specialist order but not at the mo.

                #187291
                Bob Brown 1
                Participant
                  @bobbrown1

                  This lot make "specials" **LINK** may be worth a telephone call.

                  Bob

                  #187297
                  Oompa Lumpa
                  Participant
                    @oompalumpa34302
                    Posted by Bob Brown 1 on 21/04/2015 20:30:05:

                    This lot make "specials" **LINK** may be worth a telephone call.

                    Bob

                    A really nice, genuine chap. But kept me on the 'phone for twenty minutes chatting and sometimes this can be frustrating. I emailed him last week but I don't think he "does" email very well.

                    I need an 6×48 tap and this is an arse of a thread. I can get them in the US but one tap works out at twenty quid by the time it gets here So I will just take a chance he is busy too tomorrow

                    graham.

                    #187301
                    Ian P
                    Participant
                      @ianp
                      Posted by Oompa Lumpa on 21/04/2015 20:49:34:

                      I need an 6×48 tap and this is an arse of a thread. I can get them in the US but one tap works out at twenty quid by the time it gets here So I will just take a chance he is busy too tomorrow

                      graham.

                      Can I be the first to ask, what is a 6×48 tap?

                      Ian

                      #187303
                      duncan webster 1
                      Participant
                        @duncanwebster1

                        why not screw cut it?

                        #187305
                        capnahab
                        Participant
                          @capnahab

                          Because I am not good enough at cutting an internal triple start m12 x 0.75 thread in a blind hole ( without wrecking the work piece) in which I have invested some time.

                          #187310
                          Oompa Lumpa
                          Participant
                            @oompalumpa34302
                            Posted by Ian Phillips on 21/04/2015 22:00:56:

                            Posted by Oompa Lumpa on 21/04/2015 20:49:34:

                            I need an 6×48 tap and this is an arse of a thread. I can get them in the US but one tap works out at twenty quid by the time it gets here So I will just take a chance he is busy too tomorrow

                            graham.

                            Can I be the first to ask, what is a 6×48 tap?

                            Ian

                            Ah, yes. I was confused with this too the first time I saw it. The 6 refers to wire gauge and of course it is 48 TPI.
                            Or so it was explained to me.

                            graham.

                            #187317
                            I.M. OUTAHERE
                            Participant
                              @i-m-outahere

                              Depending on what material you are cutting i wonder if you could make your own from silver steel ?

                              Then use that home made tap to make a die for the male thread ?

                              Just a thought.

                              #187321
                              Clive Hartland
                              Participant
                                @clivehartland94829

                                I use these type of 3 start taps on eyepiece threads and they are mostly an adjustable type of tap with a screw down the center to allow easy entry into existing threads. They are quite delicate to adjust and are very expensive from our Leica tooling section in Switzerland. I have cut one but as a solid and not adjustable and it worked fine.

                                Clive

                                #187324
                                JasonB
                                Moderator
                                  @jasonb
                                  Posted by Ian Phillips on 21/04/2015 22:00:56:

                                  Posted by Oompa Lumpa on 21/04/2015 20:49:34:

                                  I need an 6×48 tap and this is an arse of a thread. I can get them in the US but one tap works out at twenty quid by the time it gets here So I will just take a chance he is busy too tomorrow

                                  graham.

                                  Can I be the first to ask, what is a 6×48 tap?

                                  Ian

                                  As said in the US for threads below 1/4" dia they use a number system similar but not the same as our swg as the numbers go in the opposite direction eg a low number is larger dia eg 10=0.190" , 6= 0.138" , 0= 0.060".

                                  Typically used for UNC, UNF and UNEF and UNS thread forms.

                                  The way to write it to save confusion is 6-48 or #6-48

                                  J

                                  Edited By JasonB on 22/04/2015 07:40:33

                                  #187326
                                  Michael Gilligan
                                  Participant
                                    @michaelgilligan61133
                                    Posted by JasonB on 22/04/2015 07:38:44:

                                    As said in the US for threads below 1/4" dia they use a number system

                                    .

                                    Useful tabulation, here

                                    MichaelG.

                                    #187328
                                    JasonB
                                    Moderator
                                      @jasonb

                                      Or the more colourful one I tend to use or should that be colorful?

                                      HERE

                                      #187336
                                      Frank.N Storm
                                      Participant
                                        @frank-nstorm18349

                                        So Mr. Capnahab wants to cut a internal 12 mm thread and for this needs a #6 tap of 0.138" ? (= 3.43 mm!).

                                        Somehow these numbers don't come out even…

                                        Regards, Frank

                                        #187339
                                        JasonB
                                        Moderator
                                          @jasonb

                                          No Capnahab wants a tripe start M12x0.75 which can be bought from the US, Graham uses 6-48 which also come from the US and thats the common link.

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