McLube 444 on Knuckles

[Isaac sur Noos]

Hello thanks for providing that.
indeed teflon powder is the max allowed on rollers.

To lighten the touch a little bit less aftertouch helps a lot, once
the letoff have occur, no need to have more move of the jack. Better
for the tone also I'd say.



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Isaac OLEG
accordeur - reparateur - concert
oleg-i@noos.fr
19 rue Jules Ferry
94400 VITRY sur SEINE
tel: 033 01 47 18 06 98
fax: 33 01 47 18 06 90
mobile: 033 06 60 42 58 77
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> -----Message d'origine-----
> De : pianotech-bounces@ptg.org
> [mailto:pianotech-bounces@ptg.org]De la
> part de DCrpt@comcast.net
> Envoyé : samedi 22 novembre 2003 14:55
> À : pianotech@ptg.org
> Objet : McLube 444 on Knuckles
>
>
>         I had an interesting experience last week
> involveing a 9ft. S'way and an artist who wanted a lighter
> touch.I take care of the C+A bank of 4 D's and 5 B's for
> Jordan Kitts Music in Washington DC.Recently an American
> University piano professor selected one of our D's for her
> recital.She loved the sound of it,which made me happy since
> I had put new hammers on it last year and worked on
> building up tone with lacquer.However she wanted me to
> lighten the touch.The piano wheighed out normally in a
> range close to 50 grams.The regulation was OK except I did
> increase the aftertouch by raiseing key height slightly.I
> decided to use McLube 444 (liquid) on the key bushings and
> whippen cushions to reduce friction,and while I was at
> it,what the hell put it on the knuckles.I had heard Ron
> Connors mention this at Dallas this summer.I usually use
> teflon powder on knuckles,but thought I would see how
> McLube worked.Well I reduced friction alright,a bit too
> much I am afraid.I found severa!
> l "cheating" notes as I was tuning it before delivery.I
> moved the jacks on those notes further in so the tops of
> the jacks were closer the hammers.The next day I got a
> frantic call that the piano was broken.The performer was
> practiceing and was experiencing more repetition problems.I
> came out and spent an hour or so regulateing all the jacks
> to the knuckles.The concert was the following day and when
> I showed up for the final tuning there was a note that said
> she still had two keys that were cheating.I was
> concerned,as she was that the piano was not reliable for
> her concert.I found the notes that were cheating and found
> their jack to knucle position to be correct.So I moved all
> the knucles beyond the alignment point with the rosewood
> insert.I also wire brushed the knuckles to create a nap
> that would give friction.That worked well and I assured the
> artist the piano was fine.There were no more problems,and
> the piano has been performed on twice since then with no
> problems.So I w!
> ould say if you are going to use McLube on hammer knuckles
> be prepared to do a good jack to knuckle regulation,because
> the lack of friction will create a greater chance for note failure.
>       I think I might go back to useing teflon powder for
> knuckles...some friction is a good thing....no friction is
> a bad thing.  Robin Olson
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