Hi Joe, I cut them in half, one set for the university, the other for home shop. I didn't find I needed that much length, but others might. I tried pulling the whole length all the way through, and just found it too clumsy and unhandy to do. The half length was better, but I decided for the time being I like the back and forth action better. I actually use about 8 inches at this point, back and forth very rapidly. It is really nice to have the full set of sizes, in part so I could make Mannino style broaches for the full range of pins (roughed up a short section with a file) for when I do need to remove some material. Regards, Fred Sturm University of New Mexico fssturm at unm.edu On Sep 11, 2007, at 11:33 AM, Joe And Penny Goss wrote: > Hi Fred, Those were made special for you. Always wondered if you > liked them. Now know. > Joe Goss RPT > Mother Goose Tools > imatunr at srvinet.com > www.mothergoosetools.com > ----- Original Message ----- > From: Fred Sturm > To: College and University Technicians > Sent: Tuesday, September 11, 2007 10:31 AM > Subject: Re: [CAUT] center pinning changes/ long pin method > > Hi Jim, > Can you describe the long pin method? We discussed something along > those lines on this list a while back, but I never got all the > details. I understand one is using pins long enough to go through > several flanges, but I'm not clear how exactly one proceeds. Does > the whole length of the long pin get pushed through the bird's eye > of each flange? That seems awfully cumbersome and potentially a bit > destructive. > Joe Goss has long burnishers - very long as in a meter or so - for > all American sizes of pins, and those can be used as you describe > for pulling through the bushing. I must say I am a bit skeptical > about the idea that it makes much difference doing the pulling in > one direction, but maybe you're right. > In burnishing center felt, it seems to me that the burnisher is > going to be pressing against the felt hard enough that fibers > wouldn't be able to move around, at least significantly. At this > point in my own work I mostly do a rapid back and forth action, > fast enough and enough of them to create a good bit of heat. (You > can get heat pulling the burnisher through all the way rapidly, > but I think I get more heat faster by doing back and forth, as the > metal of the burnisher heats up). That seems to set the felt quite > nicely. And it seems to be possible to move up a half size to a > full size just using burnishing action without removing any felt, > just the ironing action. I haven't been doing it this way long > enough to have a good sense for longevity and whatnot, but it seems > to be good so far. Certainly makes sense, as long as the felt in > the bushings doesn't swell later, maybe due to humidity rise, and > make the centers sluggish, and I haven't found that in university > pianos, which get quite a bit of use. Of course I am dealing with > my own humidity environment, which is typically 10% to 60% range. > Regards, > Fred Sturm > University of New Mexico > fssturm at unm.edu > > > > On Sep 10, 2007, at 12:48 PM, Jim Busby wrote: > >> Hi Ted, >> >> Just some feedback on the "long pinning method" you mention below >> (Thanks Jurgen!). I have been doing this for quite a while now and it >> seems to have much more longevity and be more stable than other >> methods. >> I think it is because the long pin pulls one direction through the >> center, thus "combing" the fibers in one direction and packing >> them in >> tight. When I use other back and forth burnishing techniques and >> "shake >> down" the parts the grams may go from say 5 to 4 or 3 until they >> become >> immovable. With the long pinning method there is no "shaking down" >> necessary or possible. Either way is good and can be done to >> perfection, >> but this "European way" is becoming my preferred method because of >> this >> instant and permanent stability and better longevity. Better >> Longevity >> means that I repin about every 3-4 years instead of every 2-3 >> years. It >> may be even better than that because I'm at about 4 years since I >> started using the method and some are still good! >> >> Regards, >> Jim Busby BYU > > -------------- next part -------------- An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/20070911/223a1240/attachment.html
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