In this case the hammers rocked way too much...The difference between the hammer bore and the shank diameter varied as much as .013 to .016... With all due respect I would much rather have the correct bore angle and diameter for a good fit to begin with as that is what I paid for. I don't believe it is too much to ask for, especially of Steinway... Regards, Greg ----- Original Message ----- From: "David Love" <davidlovepianos@earthlink.net> To: <pianotech@ptg.org> Sent: Tuesday, May 14, 2002 12:43 AM Subject: Hammer boring fit was: Re: TOOLS/Hide Glue, etc > Depends on how wobbly. Too loose isn't good, but I like some movement so > that I can adjust angles slightly to smooth out the fanning and square up > hammers when boring isn't perfect. If you use hot hide glue it has > excellent gap filling properties and will form a nice collar that takes up > the slack well. With thinner wood glues a better fit is more important. > > David Love > > ----- Original Message ----- > From: "Greg Torres" <Tunapiana440@cox.ne t> > To: <pianotech@ptg.org> > Sent: May 13, 2002 6:39 PM > Subject: Re: TOOLS/Hide Glue, etc/Isaac Oleg's post > > > > THIS was my main gripe on my previous 'rant' about the Steinway > > hammers/parts/... > > I also like a hammer bore that is a fairly snug fit. It should never be so > > loose as for hammers to wobble. And for Steinway part's dept. to say that > is > > normal just blows my mind... > > > > Best, > > Greg Torres > > > > > > ----- Original Message ----- > > From: "John Delacour" <JD@Pianomaker.co.uk> > > To: <pianotech@ptg.org> > > Sent: Monday, May 13, 2002 7:12 PM > > Subject: RE: TOOLS/Hide Glue, etc/Isaac Oleg's post > > > > > > > What is a standard hole? The hammers should be bored so that they are a > > very tight fit on the shank before knurling. The shank should then be > > rolled through the knurling machine to reduce the diameter so that the > > hammer can be turned without creaking for about 20 seconds after gluing. > > After that it should become too tight as the moisture from the glue > > re-expands the compressed shank. The hammer should never at any stage > have > > any wobble, let alone 'fall'! If the hammers are carefully bored, hammer > > fitting is straightforward provided you follow the proper procedures. To > > have to rely on "wobble" for fore-and-aft positioning is a sign that the > > hammer heads have not been bored properly -- and there is at least one > > well-known German hammer maker whose speed exceeds his exactness. I > always > > bore my own and save myself a lot of trouble. > > > > > > JD > > > > > > > > > > > > > > > > > >
This PTG archive page provided courtesy of Moy Piano Service, LLC