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width of bottom lug on tombstone gearbox?

Discussion in 'Other Norton Motorcycles' started by pbu 232, Jul 4, 2019.

  1. pbu 232

    pbu 232

    Joined:
    Sep 3, 2013
    Does anyone know what is/was the correct width for the 'tombstone ' gearbox bottom lug? Thanks, pbu 232
     
  2. Bernhard

    Bernhard

    Joined:
    Apr 20, 2011
    Well, there’s Norton Dolls Head, plunger international gearbox and Featherbed Gearbox.

    Never heard of 'tombstone ' gearbox –which one do you mean?
     
  3. triumph2

    triumph2

    Joined:
    Aug 13, 2008
    Sturmey-Archer, Dolls head, tombstone and AMC boxes. Sorry I can't help with a dimension. I would think they would all be similar but with British engineering of the day you could never be sure.
     
  4. pbu 232

    pbu 232

    Joined:
    Sep 3, 2013
    actually it is a plunger international, but should be the same as late 40's ES2, if that is of any help
     
  5. dynodave

    dynodave

    Joined:
    May 28, 2003
    1949-56 garden gate/plunger model 7 with laydown "norton" gear box is 3.46" bottom lug and 3.3" top lug.
    Same as big single engine plate spacing ? I would initially guess they are the same, but I have NO expertise with singles.
    Believe dolls head shifter is same "norton" gearbox as laydown shifter, again I have NO experience with singles.
     
  6. pbu 232

    pbu 232

    Joined:
    Sep 3, 2013
    Thanks mate, I'll check it later, the frame is worn also, so it's a drama. BG (pbu 232)
     

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