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Hammond Power switch nut size

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    Hammond Power switch nut size

    Hello everyone,

    My Hammond A-100 is missing the nuts that secure the motor start/run switches to the organ. Because of this, they fall down and don't stay in place. It's not a big deal, but I would like to replace them. Unfortunately, I can't find any information about the size of these nuts, and I can't find any sort of "hammond switch nut" for sale online.

    Does anyone know the size/threading of this nut? Normally I would just bring it into the hardware store to check, but the Hammond is a bit too large and heavy for that. Any help would be greatly appreciated.

    Thanks!

    #2
    Tonewheel general hospital or Trek II would probably find you a couple. They are knurled rings. Below the plate they also have a nut that tightens up from underneath.
    Hammond BC (Factory 50 Hz) With TrekII Reverb, Perc and Preamp
    Leslie 147
    MK2 Farfisa Compact Duo/Binson Echorec 2 T7E
    MK1 Korg CX3/Neo Ventilator
    Yamaha KX88/Roland D550/Kurzweil K2000R/Korg M1R/Korg X3R

    Comment


      #3
      I should have some from bad switches, you can have them.
      Tom in Tulsa

      Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

      Comment


      • Drawbar Dave
        Drawbar Dave commented
        Editing a comment
        just remembered I changed out my start and run switches so I also have a set! If you're near the US tap up Tom for his and if you're in Europe hit me up

      #4
      “Thumbs up!” 8)
      Tom in Tulsa

      Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

      Comment


        #5
        Originally posted by tpappano View Post
        I should have some from bad switches, you can have them.
        That would be great! Please let me know how to proceed.

        Originally posted by Drawbar Dave View Post
        Tonewheel general hospital or Trek II would probably find you a couple. They are knurled rings. Below the plate they also have a nut that tightens up from underneath.
        I didn't see any on their websites, but I didn't think to e-mail them. I didn't think about the nut that tightens them from underneath. I'm guessing I'm missing 1 of these as well, as my start switch falls down below the plate. Is this the same nut as the one on top? Can I just take the plate off and replace it easily?

        Thanks for all the help!

        Comment


          #6
          It is actually kind of a big deal to have these nuts missing. There is 120VAC on the switch terminals, and they shouldn't just be floating around. That they are mounted in wood helps, but they could potentially contact something metal, which would be bad.
          I'm David. 'Dave' is someone else's name.

          Comment


            #7
            Are you in US or Canada? Send me a pm with your address and I'll mail them to you. I have both front and rear nuts but only one lock washer but I think I can steal one from a the Wurlitzer 8)
            Tom in Tulsa

            Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

            Comment


              #8
              ive got upper and lower and lock washers from my BC's old start run switches. If you're not in US or Canada PM me and we'll sort it out. Yes once plate is unscrewed it's easy to fix. As David says you have 120 (or 230) VAC terminals on those puppies so they need securing as soon as possible
              Hammond BC (Factory 50 Hz) With TrekII Reverb, Perc and Preamp
              Leslie 147
              MK2 Farfisa Compact Duo/Binson Echorec 2 T7E
              MK1 Korg CX3/Neo Ventilator
              Yamaha KX88/Roland D550/Kurzweil K2000R/Korg M1R/Korg X3R

              Comment


                #9
                I don't know the exact size, but there are only a few standard nut sizes for panel-mount controls like these. I've ended up with a drawer labeled "Pot and Jack Hardware" that's full of the various sizes. Whenever I replaced a bad footswitch, pot, etc..., I save the nuts if there are extras. Some come with hardware; some don't.
                I'm David. 'Dave' is someone else's name.

                Comment

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