CA Glue for pin blocks

[reggaepass at aol.com]

Hi Owen,



Thanks for your reply.  I appreciate the benefit of your experience and will likely repin as needed rather than CA in this particular situation.




Don't know the particulars of how this block was drilled (not by me), only that torque is inconsistent now.  The block was done by someone who consistently gets excellent results.  It is possible that there were many months between when the block was drilled and when it was strung.  Could that possibly be a factor?  (Just out of curiosity really--the problem remains the same regardless.)




Alan Eder


-----Original Message-----
From: Owen Greyling <greyco at kingston.net>
To: 'Pianotech List' <pianotech at ptg.org>
Sent: Tue, 3 Jun 2008 2:49 pm
Subject: RE: CA Glue for pin blocks































Hi Alan,



 



Bolduc blocks are very forgiving, compared
to say, delignit, when it comes to variations in hole size. If you drilled the
block yourself, I would consider very strongly changing something in your procedure
before you drill another. I would NOT contaminate the block with anything. Pull
the offending pins and go up one size. Do one at a time and make notes about
where you put them, because you probably won’t be able to find them a
month from now. 



I am just fitting a new bolduc hybrid
block,( first I’ve tried) and will perform a few tests before I commit to
drilling at my regular speed and length of time in the hole. I tried the hybrid
block with the small laminations because of the insane amount of fitting that
this particular block requires. The flange, which is curved, slants in the opposite
to normal direction, plus has an angled section, which is not consistent in
size nor angle, that comes up from the tuning pin field, about an inch across that
I decided to fit almost as well as the flange. The original block though
beautifully fit to the flange, had all kinds of inconsistent space between the
angled flange and the webbing. I’m not really sure why it failed, but it
may have to with the “rebuilding” this piano suffered twenty years
ago. 



 



Back to your problem. Do you know what size
drill bit, and at what rpm’s the block was drilled at? If it helps, I
drill Bolduc blocks at 1250 rpm. using an air cooled .257 high helix drill bit,
as fast as possible, about 4 to 5 seconds in the hole. I drill with the block fitted,
and attached to the plate. I would really be interested in knowing what procedure
and techniques were used. Maybe I’m just lucky but I’ve always had
wonderful results with A. Bulduc’s pinblocks.



 



As with any advice, take what you need and
discard what doesn’t work for you. 



 



Good Luck,



 



Owen J. Greyling



 
















From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of reggaepass at aol.com

Sent: Tuesday, June 03, 2008 4:33
PM

To: pianotech at ptg.org

Subject: Re: CA Glue for pin
blocks






 



A matter related to this thread:  I have a client with a recently
rebuilt piano, including a new (Bolduc) pinblock.  The torque is
acceptable on many/most of the tuning pins, but is too low on several.
 The low-torque pins are not so loose as to not hold (at least, not yet),
but make it harder to tune accurately and, especially, to get into a good
groove as one moves along from string to string. 






 









So the question is: Should I use CA on the looser pins, even though
this is an otherwise healthy, new block (I'm guessing some drilling
discrepancies are the culprit), or would CA now present problems when we
restring again (on this same block) down the road?  And, if I should NOT CA
it, what then?









 









Thanks,









 









Alan Eder





























Stay
informed, get connected and more with
AOL on your phone. 













 




-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20080603/94de3c26/attachment.html