“The Capstan No:7” Gauge

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“The Capstan No:7” Gauge

Home Forums Workshop Tools and Tooling “The Capstan No:7” Gauge

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  • #20313
    Martin King 2
    Participant
      @martinking2
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      #547687
      Martin King 2
      Participant
        @martinking2

        Hi All,

        This was in last weeks haul and I have just got around to cleaning etc.

        capstan 1.jpg

        capstan 2.jpg

        The spring action on this is VERY strong indeed and has only a very sharp pointed plunger along with the various extensions etc.

        Does this have some special specific use please?

        All seems to be in perfect condition and very clean.

        Cheers, Martin

        #547691
        Howard Lewis
        Participant
          @howardlewis46836

          Looks good! Could be a useful bargain.

          What is it? Bore Gauge, or Depth gauge? (Can't see for the tissue paper.

          Howard

          #547692
          Brian H
          Participant
            @brianh50089

            Very nice too.

            Brian

            #547694
            SillyOldDuffer
            Moderator
              @sillyoldduffer

              Rings a bell from somewhere; not an ordinary DTI – I think it's for measuring bent crankshafts?

              #547698
              Martin King 2
              Participant
                @martinking2

                Tissue paper removed!:

                capstan 3.jpg

                I think that the two small diameter rods are for turning the collar on the gauge?

                I am leaning towards some sort of bore gauge?

                Cheers, Martin

                #547701
                Oily Rag
                Participant
                  @oilyrag

                  Could it possibly be a Capstan 'stroke setting gauge'? Just a thought with it being a Capstan No. 7??

                  Or it could be a length gauge, are the threaded rods of nominal lengths?

                  Nice piece of kit which as you say Martin has hardly been used by the look of it.

                  Regards,

                  Martin

                  #547705
                  Michael Gilligan
                  Participant
                    @michaelgilligan61133
                    Posted by Martin King 2 on 29/05/2021 16:29:43:

                    […]

                    I think that the two small diameter rods are for turning the collar on the gauge?

                    […]

                    .

                    … which would, of course, be a ‘capstan nut’

                    Could this be relevant, or is it mere coincidence ?

                    MichaelG.

                    #547706
                    Neil A
                    Participant
                      @neila

                      SOD has it.

                      Its for measuring crankshaft deflection when the engine is solidly coupled to what ever it is driving. The gauge is usually fitted between the webs of the crank throw nearest to the load, "the drive end". Then shims are fitted under the engine or the load until the deflection is within the specified limits. Still a very relevant piece of measuring equipment.

                      Used on larger engines as you need to be able to get inside the crankcase through the crankcase doors.

                      Neil

                      Edited By Neil A on 29/05/2021 17:40:15

                      Edited By Neil A on 29/05/2021 17:47:50

                      #548640
                      John Reese
                      Participant
                        @johnreese12848

                        It s a crankshaft strain gauge. Here is the Starrett equivalent.

                        **LINK**

                         

                        Edited By John Reese on 07/06/2021 02:10:40

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