Hi Bruce, I have seen split washers, on some older pianos. I just can't remember the brand name. So it has been tried, and I suppose that the only reason it is not done now, is as a cost cutting measure. Regards, John M. Ross Windsor, Nova Scotia, Canada jrpiano@win.eastlink.ca ----- Original Message ----- From: <justpianos@our.net.au> To: "Phillip Ford" <fordpiano@earthlink.net>; "Pianotech" <pianotech@ptg.org> Sent: Sunday, November 07, 2004 7:46 AM Subject: Re: Cordless screwdriver > Has anybody considered a split washer as a torsioning device on flanges. > I think it may take up the "slack" during dry times, thus preventing > loosening of flanges over time. > Also since the Allen key wrench with a "ball" tip is very easy to insert in a > blind situation could this make a good alternative for situations requiring > tightening frequently. > Bruce Browning-The Piano Tuner > > > Phillip Ford <fordpiano@earthlink.net> said: > > > >I think the real difference between these two tools is the torque range > they > > >produce. The Power Grip is 0.3 to 3.5 in-lbs. Joe's Panasonic is 3.5 to 26 > > >in-lbs. Obviously, a job that one of these tools works for, the other will > > >not. Now the question is how much torque makes for a happy flange? > > > > Good question, for which I don't have a good answer. At the moment, all I > > can say is that I tighten the screws until they feel tight enough to my > > 'torque wrench', otherwise known as my hand. I did an archive search on > > action screw torque but didn't come up with anything (did come upon some > > other interesting things though - I find looking in the archives is like > > looking in a dictionary, I get so interested in all the other stuff I see > > that I forget what I went to look up). > > > > > > >It would seem to me that 3.5 in-lbs would be way less than that needed for > a > > >flange screw. Yes? No? > > > > > >Terry Farrell > > > > I've never done any torque measurements with the Power Grip, so I can only > > give you anecdotal evidence at this point. I agree that 3.5 in-lbs sounds > > way too low for a flange screw, and based on my experience with the tool > > I'm surprised at that figure for max torque. The torque settings on the > > tool are 1 - 5. I normally use something like a setting of 3 to run action > > screws in. That makes them as tight as I want them to be. I actually > > prefer to do the final tightening by hand, so that I can feel how tight the > > screw is. I use the tool for running of screws in and out to save my > > wrist. With the torque limit on the max setting I've had no trouble > > running screws into a new Steinway rail with only pilot holes. So, for my > > uses, the tool has adequate torque. > > > > As far as the question of how tight action screws should be, I'll measure > > the torque on screws that I think I've tightened adequately and report > > back. That will give one data point (probably not very convincing). But > > if a few other people do the same we might get a better picture. Also, > > someone like Don Mannino can probably give us official factory figures for > > this. > > > > Phil Ford > > > > > > _______________________________________________ > > pianotech list info: https://www.moypiano.com/resources/#archives > > > > > > -- > > > > _______________________________________________ > pianotech list info: https://www.moypiano.com/resources/#archives >
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