UK source for 17/32″ ring spanner ?

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UK source for 17/32″ ring spanner ?

Home Forums General Questions UK source for 17/32″ ring spanner ?

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  • #28498
    Mike Davies 3
    Participant
      @mikedavies3
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      #578444
      Mike Davies 3
      Participant
        @mikedavies3

        Hi,

        Question as title : I have a chuck that came on a backplate that does not fit my lathe and the two are fitted together by hex screws with a head size of 17/32" (I assume it's 17/32", that or 13.5mm…). I believe these are used on some UK classic cars but am not into such so does anyone here know a source for 17/32" (or 13.5mm) ring spanners ?

        If not then I will mangle the heads with an adjustable then turn the whole thing off…

        Thanks,

        #578447
        JasonB
        Moderator
          @jasonb

          1/4" whit may well do are they an exact imperial size or 0.525"

          Edited By JasonB on 04/01/2022 15:06:36

          #578448
          KWIL
          Participant
            @kwil

            1/4 whitworth in old money?

            #578449
            David Jupp
            Participant
              @davidjupp51506

              Depending upon origin/age of chuck, you may need a 1/4 W (also 5/16 BSF) spanner perhaps.

              0.525" or 13.34mm AF

              #578450
              Clive Brown 1
              Participant
                @clivebrown1

                1/4" Whitworth or 5/16" BSF spanner size is nominally 13.3 mm AF. Could it be that? If so then should be available.

                #578454
                Martin Connelly
                Participant
                  @martinconnelly55370

                  Google special spanners for English cars and motorbikes 17/32" .

                  Martin C

                  #578455
                  Mike Davies 3
                  Participant
                    @mikedavies3
                    Posted by JasonB on 04/01/2022 15:05:38:

                    1/4" whit may well do are they an exact imperial size or 0.525"

                    Edited By JasonB on 04/01/2022 15:06:36

                    Yay ! Didn't think of that – £3.50 on eBay, ordered.

                    Thanks to all who pointed this out and for the replies,

                    #578495
                    Nigel McBurney 1
                    Participant
                      @nigelmcburney1

                      This size 17/32 may be an old American size, 60 years ago I bought a set of Gordon ring spanners and one spanner was 25/32 never used it for years until I got interested in old stationary engines,i made some new nuts for the 7/16 dia studs on an USA made 1912 Amanco stationary engine and found that some American coarse nuts had some odd sizes across flats,I found in some old info that the USA had a large hex system similar to our large nut Whitworth system ,they seem to have abandoned their system some time before we made the changes during the early part of WW2.

                      #578501
                      Chris Evans 6
                      Participant
                        @chrisevans6

                        Pre-war BSA motorcycles use mainly whitworth sizes with some odd ball A/F including the above mentioned 25/32"

                        #578518
                        Vic
                        Participant
                          @vic

                          13mm and a file? Sorry, I’ll get my coat … laugh

                          #578539
                          Ady1
                          Participant
                            @ady1

                            I've found that ratchet spanners and grabby sockets can always find a grip on the old imperial stuff

                            The small sizes under 5mm can be a pain though

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