Selmer Deville finger button thread size

Discussion in 'Trumpet Repair and Modification' started by Chuck Cox, Sep 21, 2012.

  1. Chuck Cox

    Chuck Cox Forte User

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    Hey, Does anyone know the thread size for the French ( 1960's ) Selmer Deville that I just bought without finger buttons ? Another clue is that it is the same size as my 1949 Martin Committee's finger buttons, and I ain't putting those on the Selmer !
     
  2. stumac

    stumac Fortissimo User

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    French Selmer use a 4mm dia 0.7mm pitch metric thread. They show up from time to time on ebay. Try contacting some of the sellers that specialise in vintage parts. If all else fails I have a spare set here somewhere.

    Regards, Stuart.
     
  3. Chuck Cox

    Chuck Cox Forte User

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    Thx Stuart....if I don't hear any different, I'll order 3 @ M4x.7mm from eBay. Why does my American Martin Committee buttons fit this French Selmer I wonder ?
     
  4. stumac

    stumac Fortissimo User

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    Sorry Chuck, I have given you the wrong pitch, it should be 0.75mm. Blame it on my old eyes.

    I dont know the thread on the Martin, possibly No 6-32,this would be a loose fit in the Selmer, The Olds and Getzen I just checked are No 8-32, they will not go into the Selmer but the Selmer buttons will go into them.

    Regards, Stuart.
     
  5. Chuck Cox

    Chuck Cox Forte User

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    Thanks Stuart. That makes sense. I tried an M4x.7mm at ace hardware this afternoon. It bound up after a couple of turns. It felt like the pitch was a little tight. You pretty much confirmed it for me. ( Ace didn't carry M4x.75 to test ). I bet Ace Hardware is getting tired of me showing up with trumpet parts at their screw section and never buying anything.
     
  6. l'andorrano

    l'andorrano New Friend

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    Andorra
    Hi, this is a C-horn I suppose? How do you like it?
     
  7. Chuck Cox

    Chuck Cox Forte User

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    It's a Bb trumpet. I think it sounds real good with the right mouthpiece. Plays great with a Warburton.
     
  8. l'andorrano

    l'andorrano New Friend

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    Andorra
    I didn't know that Selmer had made DeVille in Bb.
     
  9. trumpetsplus

    trumpetsplus Fortissimo User

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    6-32 is diameter 0.138" (3,5mm), thread pitch 0.031" (0,79mm)
    8-32 is diameter 0.164" (4,2mm), thread pitch 0.031" (0,79mm)

    However
    Bach finger buttons are 6-36 which is 0.138" (3,5mm) with a thread pitch 0.028" (0,7mm)

    Schilke finger buttons are 8-36 which is 0.164" (4,2mm) thread pitch 0.028" (0,7mm)

    Yamaha finger buttons are 4mm diameter, 0,7 pitch

    Blessing, Buescher, Conn, King, Getzen use 32 tpi. Just about everybody else uses 36 tpi.
     
  10. Chuck Cox

    Chuck Cox Forte User

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    I just played the DeVille next to my Bb Martin trumpet. You had me wondering if it was Bb. It is Bb.....I need to trust my ear more.
     

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