[pianotech] National Piano Company follow up

[Ron Nossaman]

On 10/3/2012 8:40 AM, Larry Fisher RPT wrote:
> Thanks for the tip Ron.

You bet. I looked up the 1099 Scotchweld, and it looks like an ideal 
choice. Good job.


>I
> tried to break one off to give the glue a good test.  I could feel the
> pneumatic leaf bending so I stopped.  I’m thinking I might try PVCE next
> time  ............  but that may be 10 years from now.

Hopefully, or twenty. PVCE doesn't have a prayer of working, I'd think. 
Small contact area, high stress.


> The
> small wool punchings used on these push rods for shimming I’ve never
> seen anywhere else. They’re slightly larger than a quarter inch in
> diameter.

That's why old player people have a drawer (or two) full of punches.


> The dealer opted not to have the missing actuators duplicated.  Their
> dimensions are 5/32 (.155 in) X 7/16 X 1 1/16.  The hole is a .128 or
> 1/8 inch and wallowed out so the nail can move freely as the pneumatic
> leaf moves.  The originals were nylon or similar and I’d expect a good
> hardwood would make a suitable replacement.  ScotchWeld should work just
> as well to hold these on.

No more time than that would have taken, it seems pretty arbitrary when 
all 80 could have worked.
Ron N