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Best way to remove a hammer butt? #2508536
02/08/16 07:10 PM
02/08/16 07:10 PM
Joined: Jul 2015
Posts: 17
Monterey County, CA
G
germanpianist Offline OP
Junior Member
germanpianist  Offline OP
Junior Member
G

Joined: Jul 2015
Posts: 17
Monterey County, CA
I need to remove the butt from one hammer in a piano, and frankly I've never had to do that before. The hammer head and shank are perfectly fine still, I just need to know how to unglue the shank from the butt.
Thanks!

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Re: Best way to remove a hammer butt? [Re: germanpianist] #2508577
02/08/16 10:24 PM
02/08/16 10:24 PM
Joined: Sep 2004
Posts: 2,354
Old Hangtown California
G
Gene Nelson Offline
2000 Post Club Member
Gene Nelson  Offline
2000 Post Club Member
G

Joined: Sep 2004
Posts: 2,354
Old Hangtown California
It's helpful to have a removal tool. It fastens to shank and is threaded so that when you turn the threads it pulls the shank relatively evenly with some leverage advantage.
Take a knife and trim any exposed glue collar, hook up extractor and put a little tension on it, a couple drops water at glue joint, warm up butt with a heat gun and don't burn the wood and just a little more torque it should slide out easily.l when glue softens.
If it breaks inside the butt it's a bit more effort different procedure but you can avoid that by being careful.


RPT
PTG Member
Re: Best way to remove a hammer butt? [Re: germanpianist] #2508626
02/09/16 03:21 AM
02/09/16 03:21 AM
Joined: Jan 2011
Posts: 1,650
Canberra, ACT, Australia
C
Chris Leslie Offline
1000 Post Club Member
Chris Leslie  Offline
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C

Joined: Jan 2011
Posts: 1,650
Canberra, ACT, Australia
Also, if you intend to replace the buck skin as well, a hair straightener can be clasped over the butt to provide heat. If fact, you don't really need a removal tool for pulling. The heat alone and a little moisture is sufficient to soften the glue enough to twist the shank out by hand after about a minute.


Chris Leslie
Piano technician
http://www.chrisleslie.com.au
Re: Best way to remove a hammer butt? [Re: Chris Leslie] #2508646
02/09/16 05:41 AM
02/09/16 05:41 AM
Joined: Oct 2008
Posts: 466
Münster, Germany
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Gregor Offline
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Gregor  Offline
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Joined: Oct 2008
Posts: 466
Münster, Germany
Originally Posted by Chris Leslie
a hair straightener


[img:center][Linked Image][/img]


piano tech - tuner - dealer
Münster, Germany
www.weldert.de
Re: Best way to remove a hammer butt? [Re: germanpianist] #2508689
02/09/16 11:09 AM
02/09/16 11:09 AM
Joined: Jan 2012
Posts: 186
South Jersey
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BenP Offline
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BenP  Offline
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Joined: Jan 2012
Posts: 186
South Jersey
A couple drops of vinegar will also do wonders loosening up hide glue. In fact, if you're replacing the butt anyway (which it sounds like you are), you can soak that whole end of the hammer shaft in vinegar for a few minutes and the shaft should pop out quite easily.


Ben Patterson, RPT
South Jersey Piano Service, LLC
www.sjpianoservice.com
Re: Best way to remove a hammer butt? [Re: BenP] #2509185
02/10/16 05:44 PM
02/10/16 05:44 PM
Joined: Oct 2011
Posts: 881
Hong Kong
Weiyan Offline
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Weiyan  Offline
500 Post Club Member

Joined: Oct 2011
Posts: 881
Hong Kong
Originally Posted by BenP
A couple drops of vinegar will also do wonders loosening up hide glue. In fact, if you're replacing the butt anyway (which it sounds like you are), you can soak that whole end of the hammer shaft in vinegar for a few minutes and the shaft should pop out quite easily.

Should the vinegar residue weaken the join of new glue?


Working on:\

J.S.Bach Prelude in C Min: No. 2 from Six Preludes fur Anfanger auf dem
Am Abend No. 2 from Stimmungsbilder, Op. 88
60s Swing No. 1 from Swinging Rhythms
http://weiyanwo.wordpress.com
Re: Best way to remove a hammer butt? [Re: Weiyan] #2509204
02/10/16 06:22 PM
02/10/16 06:22 PM
Joined: Jan 2012
Posts: 186
South Jersey
B
BenP Offline
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BenP  Offline
Full Member
B

Joined: Jan 2012
Posts: 186
South Jersey
Originally Posted by Weiyan
Originally Posted by BenP
A couple drops of vinegar will also do wonders loosening up hide glue. In fact, if you're replacing the butt anyway (which it sounds like you are), you can soak that whole end of the hammer shaft in vinegar for a few minutes and the shaft should pop out quite easily.

Should the vinegar residue weaken the join of new glue?


No, not if it's cleaned off and allowed to dry thoroughly.


Ben Patterson, RPT
South Jersey Piano Service, LLC
www.sjpianoservice.com

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