This has been exactly my experience. BIG hammer, few blows - and if one or two blows goes a little astray, the pin goes crooked. Smaller hammer, many blows & I never saw the pin go crooked (like I did with BIG hammer). Pin torque WAY more consistent with smaller hammer. I ordered the air hammer Del recommended. I feel certain that will get torques even better - with the air hammer, I expect that the limiting factor in torque consistency will be my drilling technique. Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "Diane Hofstetter" <dianepianotuner@hotmail.com> To: <pianotech@ptg.org> Sent: Tuesday, October 24, 2000 3:15 AM Subject: Re: Air hammers for Pin torque > Hi Barrie, > > I like your history website! You've sure done a lot of work on it. > > I believe that a primary cause of the better and more consistent torque is > from it being hit by many small blows rather than a few heavy ones. True, > the pin does go in straighter all the way. Also the number of blows is > probably more consistent. The hammer hits at regular intervals and the > distance each pin has to go down is the same. I notice that when I string > with a sledge, I tend to use differing numbers of hits with the hammer, > depending on how tired I am! > > (A lot less tired with an air hammer!) > Diane > > > >From: Barrie Heaton <Piano@forte.airtime.co.uk> > >Reply-To: pianotech@ptg.org > >To: pianotech@ptg.org > >Subject: Re: Air hammers for Pin torque > >Date: Mon, 23 Oct 2000 19:54:52 +0100 > > > >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/ > >AcryliKey Ivory Repair System UK © http://www.acrylikey.co.uk/ > >The U.K. Piano Page © > >http://www.uk-piano.org/ > > Home to the UK Piano Industry > > _________________________________________________________________________ > Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. > > Share information about yourself, create your own public profile at > http://profiles.msn.com. > >
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