Jon Page wrote: > I ordered a set of f/r pins for a high use grand. They sent these rather > large plastic tubes to retrofit the new pins. It seems to me that having > to ream the frame hole .040" and then ream the tube hole .020" would > leave some room for slight misalignment. I doubt it's worth worrying about. Machinists have been double drilling for hundreds of years with no apparent problems. The reaming pass self centers in the original hole much more accurately than you could locate the hole from any measurement. I've been double drilling pinblocks for something like 25 years and find no indexing problems whatsoever with the second pass. Adequate accuracy is almost unavoidable. > I'm surprised that shim is the best they can do as a supplier. It seems > to me that something a simple .012" plastic sheeting would be an > adequate shim material, or even paper (since the glue would solidify it). I'd think so too, or scuffing up the pin base and gluing it in with their Assembly #65 glue. They swear it works to hold wooden hammer moldings onto carbon fiber shanks, so it ought to work for holding aluminum pins in wood, right? I have a set I haven't used yet. When it comes up on the wheel, I'll decide, but centering the reaming passes in the existing holes won't be a factor in the decision. Ron N
This PTG archive page provided courtesy of Moy Piano Service, LLC