Hi, Alan,
Without necessarily disagreeing (because I am similarly loathe to change
things that don't need/want changing), it's also important to remember
that, for some makers, changing the back rail is the primary way of
establishing a _basic_ (not fine) key height.
Besides...if we're going to the trouble of raising the keypins, why not
simply replace what's there with the lovely "new" ones from WN&G?
I do agree with Jon that making sure that the pins extend far enough
into the mortises at rest (1/4" is certainly fine) helps with bushing
life; and much better control for the pianist.
Kind regards.
Horace
On 3/8/2018 4:02 AM, Alan Eder via Piano Technicians Guild wrote:
> Please do not forward this message due to Auto Login.
>
> James,
>
> I would advise against making elevation changes at the balance rail or back rail solely for the purpose of getting more front rail pin into the mortise in the key. I would sooner either raise the pins that are already there, or replace them.
>
> Alan
>
> ------------------------------
> Alan Eder, RPT
> Herb Alpert School of Music
> California Institute of the Arts
> Valencia, CA
> 661.904.6483
> ------------------------------
> -------------------------------------------
> Original Message:
> Sent: 03-07-2018 23:44
> From: James Kelly
> Subject: Front key pin depth in key
>
> Is there any specific distance that a front key pin should be in the mortise ??? i am sure I have read about a minimum such as at least the depth of the bushing cloth. I am about to finish the top stack of a piano that had an action that barely worked however I noticed the front key pins are not that far into the mortise so I will need to work on the height at the balance rail and perhaps add some back rail cloth. This piano had endured a flood but was not buried under water. Someone got it to play but?? I am not even sure how they managed that since the regulation was so bad and key end felts as well as backchecks were all dried out ... I had no specs to work from but noticed that key 88 was exceptionally loose . On close exam I noticed that the key had barely any key pin in it a the rest position . Other keys did but not very much. .
>
> ------------------------------
> James Kelly
> Pawleys Island SC
> 843-325-4357
> ------------------------------
>
>
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Original Message------
James,
I would advise against making elevation changes at the balance rail or back rail solely for the purpose of getting more front rail pin into the mortise in the key. I would sooner either raise the pins that are already there, or replace them.
Alan
------------------------------
Alan Eder, RPT
Herb Alpert School of Music
California Institute of the Arts
Valencia, CA
661.904.6483
------------------------------