pinblock drilling angle, with pin bushings

[Richard Brekne]

Probably not all that good a thing you describe below. I ran into that 
one quite a ways back as well, and I think most anyone whose done any 
pinblock drilling has as well.

I always bypassed the problem by using pin bushings that were not 
pre-drilled. A dab of glue between the pinblock and the bushings keeps 
them tight so I dont run into the spinning bushing syndrom.

I'm not really sure whether its a big thing really... bushings get 
slightly crushed pretty easily.

Cheers
RicB



Michael Spalding wrote:

> Listers,
>  
> Just finished stringing a piano with tuning pin bushings.  Drilled the 
> pinblock at 4 degrees, but the bushings, of course, are aligned with 
> the holes in the plate webbing at 0 degrees.  Also, unless the 
> pinblock drilling is perfect, the bushing will be offset from the 
> pinblock hole.  So as the pin is driven through the bushing and into 
> the pinblock, I can see it change direction, and I would think that 
> either the bushing or the pinblock (or maybe both) is being damaged by 
> this misalignment .   Pin torque is right where I want it, so maybe 
> I'm obsessing over nothing.  But I would appreciate hearing from some 
> of you who have more years of following your restringings, is this in 
> fact a problem, and if so, how do you minimize the effect?
>  
> thanks
>  
>  
> Michael Spalding
> spalding48@earthlink.net <mailto:spalding48@earthlink.net>
>  
>