On 01/03/2016 09:53 AM, andy pugh wrote: > On 3 January 2016 at 17:37, Kirk Wallace <kwall...@wallacecompany.com> wrote: > >> I'm also working on a New Haven clock that seems to use custom screw >> threads (#3-40?) that don't appear in Machinery's Handbook or anywhere else. > > I thought it might be a watch pendant thread, or Progress, but I can't > find anything that coarse at that diameter: > http://www.bodgesoc.org/thread_dia_pitch.html
Here is the clock in question: http://www.wallacecompany.com/clocks/New_Haven/IMG_2273-1a.jpg I need to make a pendulum suspension assembly like on this clock: http://www.wallacecompany.com/clocks/New_Haven/000.jpg Here is one of the pillar screws that should work for the left hole. The right has a smaller thread which I haven't looked into yet. Andy, thank you for the thread table link. Gene, > I would think some carefull measurements would lead to a G76 > configuration that could duplicate at least the screw. I have a German clock that also needed custom screws which I ended up taking a guess, cut a screw in brass and tested in a hole, rinse, repeat until I made one that fit, then made a set in steel. http://www.wallacecompany.com/clocks/Halblang/Pictures/IMG_8548-1a.png http://www.wallacecompany.com/clocks/Halblang/Pictures/IMG_8570-1a.png http://www.wallacecompany.com/clocks/Halblang/Pictures/IMG_8575-1a.png I haven't needed to make taps yet. (BTW, the movement has a mark of "Halblang" which I thought was the maker, but it seems it is a Germanish word for half beat?) -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
