Rotating pinblock

[Ron Nossaman]

>Hi List, Just want your opinion on a problem that I am having with a 
>certain brand of pianos.  There are several that I am servicing of the 
>same brand that do not use a plate bushing.  Several months after shipment 
>from the manufacturer I have noticed that the tuning pins have moved 
>forward in the plate holes to the point of the pins touching the front of 
>the tuning pin holes in the plate.  The pins have now rotated to the point 
>that most of them are no longer slanting back (7degrees) but are now 
>either straight up and down or actually tilting forward having pivoted on 
>the front of the plate hole.  The manufacturer says that "most techs don't 
>think this is a problem."  This situation is also accompanied by very 
>noticeable tuning instability. I happen to think that this is a great 
>problem and have told them so.  What do you think? TP


I don't believe block rotation, but pins migrating in a too soft block 
aren't that uncommon. What brand?

Ron N