CAUT

  • 1.  FYI–UST 9's

    Registered Piano Technician
    Posted 22 days ago

    I have an institutional contract that includes caring for about a half dozen Kawai UST 9's. The grand style fallboards pivot on brass machine screws that go into the cabinet and they have a tendency to unscrew themselves over time. Routinely, I have screwed them back in on my annual visits but now a few completely unscrewed themselves and the screws disappeared. So now I'm putting a drop of carpenter's glue on the screws in the hope that it will add enough resistance that they won't come loose.

    For the record, the correct replacement size is a #4m-.7x16mmmetric machine screw (Phillips flat head). A zinc plated version can be found on Amazon but the brass screws are harder to come by, I ended up getting some from China on eBay. Actually the steel screws are visually passible and the threaded inserts they screw into are also steel so less chance of electrolysis.



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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  • 2.  RE: FYI–UST 9's

    Registered Piano Technician
    Posted 21 days ago

    I would use blue loctite for that application. You can still removed them, but they won't fall out.

    -Dean



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    Dean Reyburn, RPT
    Reyburn Pianoworks
    Reyburn CyberTuner
    1-616-498-9854
    dean@reyburn.com
    www.reyburnpianoworks.com
    www.cybertuner.com
    www.reyburntools.com
    Facebook: www.facebook.com/dean.reyburn
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  • 3.  RE: FYI–UST 9's

    Posted 21 days ago
    Hi -  Try using a small drop of blue loctite on each screw. 

    Best,
    Dennis. 

    Dennis Johnson, R.P.T.
    Facebook.com/johnsonpianoservice
    (612) 599-6437  (cell)





  • 4.  RE: FYI–UST 9's

    Registered Piano Technician
    Posted 21 days ago

    Dean and Dennis, thanks!



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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