Is there a particular length for the shoe? I would imagine longer would be better... David Ilvedson Pacifica, CA On Jan 11, 2010, at 6:01 PM, "David Love" <davidlovepianos at comcast.net> wrote: Not exactly. When you remove the roller bearing and go to a flat punching you can add a bottom shoe to the keystick that’s the same thickness as the roller bearing you just removed making the key taller and thus stiffer (as with any beam). Some time back this was addressed here possibly under the heading of “action saturation” referring to the phenomenon of diminishing returns on the production of hammer speed with increasing accelerating of the front of the key because of key flexing. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Kerry Sent: Monday, January 11, 2010 5:34 PM To: pianotech at ptg.org Subject: Re: [pianotech] S & S Bearings...was Punching Trick??? Meaning the flexing of the keystick? How would that work? By increasing the fulcrum contact area? Kerry Kean www.ohiopianotuner.com From: David Love [mailto:davidlovepianos at comcast.net] Sent: Monday, January 11, 2010 3:52 PM To: pianotech at ptg.org Subject: Re: [pianotech] S & S Bearings...was Punching Trick??? I’ve heard of people removing the bearing and increasing the key height proportionally to reduce flexibility. Going the other direction seems like it could be a problem. David Love www.davidlovepianos.com From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Kerry Sent: Monday, January 11, 2010 11:03 AM To: joegarrett at earthlink.net; pianotech at ptg.org Subject: Re: [pianotech] S & S Bearings...was Punching Trick??? What about the key height? Kerry Kean www.ohiopianotuner.com From: Joseph Garrett [mailto:joegarrett at earthlink.net] Sent: Monday, January 11, 2010 1:16 PM To: pianotech Subject: [pianotech] S & S Bearings...was Punching Trick??? On a related note, has anyone retrofitted a standard keyboard with S&S bearings? How much difference did it make and how much trouble was it? Thanks in advance to anyone who can answer any of these. I have done that on two pianos. One was the Irish P.O.S. with all plastic parts, including keys. I liked the concept and found that it worked well in that application. The only thing needed that would be out of the ordinary is the longeer balance rail pins. Made a good retrofit project. Joe Joe Garrett, R.P.T. (Oregon) Captain, Tool Police Squares R I -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://ptg.org/pipermail/pianotech.php/attachments/20100112/3f5a3625/attachment.htm>
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