Flange Center Friction Increase

[Ron Nossaman]

>Yeah, I simply repinned about 80 of the flanges. Was just looking for some 
>sort of explanation of what would cause such a reaction. Seemed pretty 
>darn weird to me. Working on this 1990 YC action has given me a bit of 
>insight as to why some pianos cost less than others. The bushings are 
>incredibly varied - some are rather black inside, some are red, some are 
>pink - after reaming, some burnish real nice a smooth, some squeak, and 
>some you can't even burnish with the same Mannino tool you just reamed 
>with. Seemingly horribly inconsistent. It is as if three different types 
>of bushing felt was used. Not a good thing I should think.
>
>Terry Farrell

I'm told it's a corrosion thing. The center pin plating apparently lets go 
of the pin and jams up, and contaminates, the bushing.

Ron N