tapered tuning pins

[Farrell]

This is a multi-part message in MIME format.

---------------------- multipart/alternative attachment
I am not Mr. experience, but that won't stop me from plaguing you with =
my thoughts!   ;-)

I would definitely recommend that you redrill the pin holes. The =
relationship between the bit size and pin size will vary depending on =
the type of block and the drilling methods. Do a search in the archives =
and you will find all sorts of suggestions for where to start. Start =
conservative (use a bit that might be on the small side) and drill. Try =
the 3/0 pins first. Start at A0, drill the hole and pound the pin. Test =
the feel before you go any further (and maybe, just in case you are way =
off in fit, try turning the pin after you pound it in half way - if it =
is too tight at that point, just turn the darn thing out and drill out =
the hole with a bigger bit). Adjust as necessary. You can patch up the =
first few with the 0.288 if need be, and you will likely have a good =
combination for fit within the first few pins. Remember to use good =
support underneath and mic the pins first.

Terry Farrell
  ----- Original Message -----=20
  From: Tom Driscoll=20
  To: pianotech@ptg.org=20
  Sent: Tuesday, January 20, 2004 1:01 AM
  Subject: tapered tuning pins


  List,

              I'm replacing bass strings on an older   5'10" Henry F =
Miller grand. The existing pins are tapered --.282 at the top of the =
threads down to .270 @ the bottom. 2 =BD "long. and reasonably tight.  =
Based on past experience I would use one size larger pin (usually 3/0 ) =
and expect good tunability.=20

              I usually use Denro blued (.286) but I don't remember ever =
repining a block that had tapered pins.

  Should I chase the hole with a pin block drill bit and if so what =
might the relationship between drill bit size and tuning pin diameter? =
I'm a bit hesitant to do this as I was advised against reaming holes in =
old blocks by a manufactures tech rep and past journal editor     =20

  I see Diamond brand offered by Pianotek has a 3 =BD .288 diameter =
pin.I 'm considering using Diamond 3/0 's and having the 3 =BD 's to use =
if necessary



  I'm all for experimenting here and will report my results, but any =
advice on this will be appreciated.

              Tom Driscoll

             =20

  P.S. Please refrain from the "why don't you replace the block =
"argument. The piano plays well, stays in tune within reason, and will =
benefit from new bass strings in a home where the budget cannot consider =
a rebuild.

                                                                         =
                           =20

             =20

---------------------- multipart/alternative attachment
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/06/77/f2/8f/attachment.htm

---------------------- multipart/alternative attachment--