[pianotech] Pin removal speed

[bergpiano]

Rob,

I use a pnuematic impact wrench. I would say it reduces the glaze with the 
little impact movements. It removes a pin in about 2 seconds. You have to 
control it to find the right speed. It can go too fast especially toward the 
top of the hole. If you can't hold the removed pin against the inside of 
your wrist it is too hot,  just like the Chinese tea cup test. Then do some 
testing with cleaning brushes. Gun cleaning brushes work great. You may need 
to ream the hole with a reamer or drill bit. Sometimes certain areas of the 
block require different cleaning methods. As an example: when  restrung with 
a #4 pin or Lo Torq pin you can end up with a consistent 130 to 150  inch lb 
torque for the most part. A 3 ½ pin would lower the torq.

Dan Berg
Berg Piano Services
407-884-1814
http://bergpiano.com
Your Home For Piano Help


----- Original Message ----- 
From: "Rob McCall" <rob at mccallpiano.com>
To: <pianotech at ptg.org>
Sent: Tuesday, March 08, 2011 12:45 AM
Subject: [pianotech] Pin removal speed


Greetings,

What's the consensus on the speed at which to remove tuning pins from an 
otherwise good pinblock?

I've read to go slow as to not heat up or burnish the hole, and I've read 
someone on here recently who recommended the exact opposite, namely to go 
fast so as to not build up excessive heat.

So which do you use?  Why? Are your results consistent?

Thanks,

Rob McCall

McCall Piano Service, LLC
www.mccallpiano.com
Murrieta, CA
951-698-1875