This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Re: those pesky swingsHi Wim, sorry to give you more work so close to the holidays, but the "protek" topic comes up from time to time, so would you mind trying the following? Choose the centre-pin that provides a snug birds-eye fit (hopefully only one size-over), and gently ream/burnish the bushing to get a reliable function; 3 1/2, 4 swings, whatever. Then, ... treat it with Protek again! The situation where Protek makes a overly tight centre ridiculously loose in a nanosecond, has been blamed on a number of likely causes; plated center pins, over-burnishing, corrosion,etc. And I think any of these may be correct, given the circumstance. Since you hadn't mentioned the origin of the parts, or whether they had previously been re-pinned, I'm going to guess that corrosion is the culprit. Hopefully the reaming will remove any glaze from the bushing cloth, the (repeat) Protek'ing will do no more than it's supposed to (protect the nice shiny pin and the cloth), and you will have a very stable part. Please share your results, if you don't mind. With "mystery" actions, where the pinning seems tighter than it has a right to be, my habit is treat the centers with Protek in advance of re-pinning, just to know what I'm dealing with. BTW, I do recall Newton mentioning protek'ing center pins quite recently, and how sad he can't be here to share his wisdom with us now. kindest regards, Mark Cramer, Brandon University We all know that a hammer is supposed to swing 4 - 8 times. If it is less than 4, then the bushing is too tight. If it's more than 8, supposedly the bushing is not tight around the pin, and that might cause the hammer to wobble up to the string, which will eventually lead to uneven wear on the hammer, whcih creates tone problems, ya da, ya da. So here is the problem. I've got this hammer with only 3 swings. So that mean the bushing is too tight. Before I take the pin out, ream the bushing, and put in the same size pin, I put a little Protec on the bushing. But now, all of a sudden, I've got 10 - 12 swings. According to the above presumption, the bushing is now not tight around the pin any more. Or is it? Has the introduction of Protec shrunk the bushing to the point I need to ream and repin with a larger pin? Or do I leave the original pin in there, and allow the 10- 12 swings? Wim ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/caut.php/attachments/c1/ae/e4/a0/attachment.htm ---------------------- multipart/alternative attachment--
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