[CAUT] new front pins

Fred Sturm fssturm at unm.edu
Tue May 12 18:27:35 MDT 2009


On May 12, 2009, at 4:28 PM, G Cousins wrote:

> Encountered this before. One time plugged everything, drilled & re- 
> pinned  Scale of 1-10 a 7 job and a 20 pain
> Other time routed a full length insert. Much more better. Scale 9  
> job  5 pain.
> You may be able to figure out some sort of wooden bushing like a t- 
> pin bushing but that may be more trouble than worth

	I definitely don't want to go to the trouble of plugging and  
drilling, or doing an insert. This is a matter of wanting to replace  
"not so bad but iffy" pins with new WNG ones (while doing a fairly  
complete keys/action rebuild). WNG has a .131" shank, original are . 
150. I've been toying with some way of bushing the holes, with thin  
veneer, sandpaper, or just paper.
	So far my thinnest veneer comes up about .005" too thick, which might  
compress to make a tight fit, but getting the veneer and pin both in  
the hole is hard, maybe impossible. 220 sandpaper is a fairly snug  
fit, and goes in with a bit of finagling, but the result is a pin that  
can be turned with finger pressure - too lose. 180 seems very  
promising. It's a little touchy cutting just the right width strip,  
and then getting it to curl with the sand outward, to get it in the  
hole. I have found that curling it around a nail smaller than the  
shank of the new front pin works well. The sand holds the paper in  
place while driving the pin. I left a little ridge (1 mm or so) above  
the hole (level of the front rail) as an aid to getting the pin into  
the paper. And just left the pin a little high. Seems nice and snug
	So maybe I have answered my own question (thinking it over while  
tuning a piano after sending the post, then getting home and  
experimenting with ideas). Any comments about possible flaws would be  
welcome.

Regards,
Fred Sturm
University of New Mexico
fssturm at unm.edu


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