On 9/19/2010 5:42 PM, Roger Gable wrote: > Ron, > I don't see any standard that used 52 threads per inch. My thread gauge > tags it at 56, but we could be measuring two different manufacturers, or > my eyes are getting worse than I'd like to admit. My magnifying glass still works, fortunately, unlike the eyes. Different manufacturers would be my guess. The brass plate systems always were a crap shoot as to whether I had a screw that would fit them. > On a related subject. I got involved in thread technology about a month > ago when I couldn't gauge the threads of the Samick leg and lyre bolts. > I discovered that the threads used by Samick is an obscure thread called > British Whitmore. So if you loose the leg or lyre bolts to these pianos, > your only replacement source is from Samick. > Roger Gable Whitworth, that is. It was the first attempt at a world standard, when everyone was using something different. I've had movers lose the bolts, and just made new nuts for locally available bolts. Seemed easier, overall, and certainly quicker. Ron N
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