Pianotech

  • 1.  Inserting and glueing Jack Springs

    Member
    Posted 07-24-2023 11:31

    I am replacing all of the original and weak jack springs on a full upright made by Cable. Looking for the best way to hold and press the new spring into the whippen and seat it as far as possible. Perhaps duckbill pliers will work or maybe there is a tool that Schaff carries ? I have tried pliers and tweezers but they tend to distort the spring or catch on the spring coils. I ream out the hole with the Schaff reamer to get a clean hole and all of the old hot hide glue and add a drop or two of titebond before inserting the spring



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    James Kelly
    Owner- Fur Elise Piano Service
    Pawleys Island SC
    (843) 325-4357
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  • 2.  RE: Inserting and glueing Jack Springs

    Registered Piano Technician
    Posted 07-24-2023 12:14

    I usually use tweezers.  I'll place the spring into the hole with a little dab of glue, then grab a few coils near the top and direct the tip of the spring into the jack.  It's a bit finicky, but it works.  I make sure the bottom of the spring is fully seated, again using the tweezers.  It's easier to do with the bridle straps disconnected so the wippen hangs down, using an action jig to hold everything.



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    Paul McCloud, RPT
    Accutone Piano Service
    www.AccutonePianoService.com
    pavadasa@gmail.com
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  • 3.  RE: Inserting and glueing Jack Springs

    Registered Piano Technician
    Posted 07-24-2023 15:05

    Like Paul said, a small flat screw driver is helpful to hold the spring down whilst removing the tweezers if they are catching.



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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    Original Message


  • 4.  RE: Inserting and glueing Jack Springs

    Member
    Posted 07-24-2023 20:13

    Thank you both Its one of those jobs you don't do frequently Last time I did it was on a spinet but this action has two flanges because of the ;long wooden sticker that sits above the keys. The bridal straps are not connected making it easier to work on the whippens. 



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    James Kelly
    Owner- Fur Elise Piano Service
    Pawleys Island SC
    (843) 325-4357
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    Original Message