[pianotech] Pinblock Cracks; CA or Epoxy?

David Boyce David at piano.plus.com
Mon Nov 5 03:06:41 MST 2012


Thanks for all your responses folks.

The client at first sent me the photo, and I did think that as sometimes 
happens, it would only be a spliit in the birdseye veneer, and indeed I 
emailed that thought to him.

However, when I got there, using a fine broach as a 'depth guage', I 
found that the splits had depth varying from about a quarter of an inch, 
to three eigths of an inch.

The piano had been in exactly the damp-to-dry scenario.  The house was 
unoccupied and damp for years, then everything including the piano, put 
in storage while the house was gutted and renovated (with electric 
underfloor heating), then brought back into a warm dry house.

Actually, the tuning pins were fine, in terms of tightness, although, as 
you may see from a close look at the pic, oblong. Yukl yuk yuk.  The 
piano was about 400 cents low in some parts, and 200 in the bass, and we 
settled on tuning it at 300  cents low to see how it went.  It hurt me 
to pull the bass down, but it seemed the best option.

I did feel that with the epoxy, it might be difficult to get good 
penetration, and that this might be easier with CA, but I wondered if 
epoxy might be stronger at holding things together.

I've explained to the client that we will need to keep an eye on how the 
piano performs over the months, in its now warm and dry environment.

A photo is attached. Plus you can see photos of part of the journey to 
his house on my Blog at  pianopinions.tumblr.com

Best regards,

David.


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