Thanks Will, I am trying to make a hammer set work that I have had for several years. Did not realize they would be going onto this piano when I bought them nor did I know about WNG parts at the time. Whenever I have ordered Isaacs in the past, they are always uncut/undrilled etc. To order them precut/predrilled etc would only shorten what I thought was his standard grand hammer set. So I am a bit suprised that I have run into this. Feel like I asked a dumb question. Gene ----- Original Message ----- From: Will Truitt To: pianotech at ptg.org Sent: Saturday, February 14, 2009 3:38 PM Subject: Re: [pianotech] WNG Backchecks Hi Gene: To avoid the kind of issues that you are having, it has been my practice to measure the string height and hammer center pin height and calculate the boring distance. I also record the hammer tail lengths at the ends of each section (they will vary in length in some pianos). Most of the time I will use the lengths that came with the original hammers. Then I order a set of hammers where the overall hammer length is at least several mm greater than anything I would likely need. After I have bored the set, if the tail lengths vary, I mark the tail length from the center of the bore at the ends of each section, and then strike a line across the massed hammers. I have a little jig I use on my bandsaw to then cut the tails to length. Having custom bored the hammers to the piano and established the preferred tail length, I hang the hammers. I regulate the let off for sample hammers at each section end. At let off, I measure the distance from the bottom of the tail to the top of the key to establish what the back check height needs to be. I will then press the new back checks into the hole to the desired height. If I am not mistaken, I believe the WNG back checks come in two wire lengths. If you order hammers that are long enough, you should not have the issues you encountered here. Will Truitt From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Gene Nelson Sent: Saturday, February 14, 2009 4:35 PM To: pianotech at ptg.org Subject: [pianotech] WNG Backchecks Hello list, While trying to get ready for installation of my first WNG Backcheck set I discover that my hammer set (purchased uncut, unbored & uncoved) is not long enough (especially in the upper bass) to get the 25.4mm beyond bore distance. Anyone else get a chance to work with these yet? Have similar issues? Gene -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090214/3e3c310b/attachment.html>
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