Air hammers for Pin torque

[Farrell]

> Could it be because there is no side impact to the pin,  as you get with
> the arching effect  with  a normal hammer - so the pin or punch is not
> hit square each time.

I fully believe this is exactly (or at least mostly) the cause of
inconsistent torque (in an otherwise consistently drilled/manufactured
pinblock).

Terry Farrell
Piano Tuning & Service
Tampa, Florida
mfarrel2@tampabay.rr.com

----- Original Message -----
From: "Barrie Heaton" <Piano@forte.airtime.co.uk>
To: <pianotech@ptg.org>
Sent: Monday, October 23, 2000 2:54 PM
Subject: Re: Air hammers for Pin torque


> In article <002601c03bda$5aaa6680$bd3c070c@delsmachine>, Delwin D
> Fandrich <pianobuilders@olynet.com> writes
> >
> >----- Original Message -----
> >From: "Diane Hofstetter" <dianepianotuner@hotmail.com>
> >To: <pianotech@ptg.org>
> >Sent: October 21, 2000 12:10 PM
> >Subject: Re:Air hammers for Pin torque
> >
> >
> >> Around the time I started stringing with an air hammer, I mentioned it
at
> >a
> >> PTG meeting.  After the meeting, Laroy Edwards came over and told me
that
> >at
> >> the Yamaha factory they had discovered they got better and more
consistent
> >> pin torque with an air hammer.
> >> Diane
> >>
> >-----------------
> >
> >This has been our experience as well.
> >
> >Del
> >
> >
>
> Could it be because there is no side impact to the pin,  as you get with
> the arching effect  with  a normal hammer - so the pin or punch is not
> hit square each time.
>
> Barrie,
> --
> Barrie Heaton      PGP key on request           http://www.a440.co.uk/
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