Pinning on new flanges

[Richard Brekne]

Hi Bob

I nearly always repin new flanges when installing.  I've heard all the 
arguments back and forth... seen a few demonstrations from manufacturers 
as to how meticulous they are.... and nevertheless always find about 
half of any given set of flanges either too loose or too tight.  I go 
for a safe 5-7 swing window using german "silver steel" centers.

Interestingly enough, it is the position of the Yamaha factory that 
wooden flanges with felt bushings remain quite stable with regards to 
tightness as (they say) the reactions of the wood holes, and felt 
bushings are very close to exactly opposite to climatic changes.  Indeed 
they argue against Kawaiis (and others)  use of plastic flanges very 
much on this basis.

I dont find any real change in tightness in flanges due to climatic 
change, but I do find change in friction levels on some pianos. That 
might seem a strange comment, but if you think about it... friction is 
easily caused by matters not related to tightness perse.

RicB

Bob Hull wrote:

>List,
>
>I was preparing a new set of shanks and flanges for an
>action rebuild (a recital hall piano)and found that
>the pinning maybe too loose.  Many of them will swing
>8-10 times before coming to a stop; some will swing 11
>- 12 and a few 7 times.  These are high quality parts
>from a reputable manufacturer.  The humidity in my
>shop is in the mid 50's.  When winter comes and the
>humidity in the recital hall drops way down won't
>these be to loose?  I was looking for about 3-5 swings
>in the bass graduating up to about 7 max. in the
>treble.
>
>I am facing a deadline and may need to get another set
>sent if the manufacturer agrees which will cost me at
>least 2 days.
>
>Would you repin, reorder or what?
>
>Bob Hull
>
>
>
>
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