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Grand Piano dag blocks function. Can someone please explain?

  • 1.  Grand Piano dag blocks function. Can someone please explain?

    Posted 16 days ago

    Hi can someone please explain me the function is the dag blocks? 



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    Julien Blackman
    Cunupia
    1-868-744-3499
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  • 2.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 16 days ago
    Hi Julian

    A dag block is in the back of the keybed to stop the action from hitting the damper tray. It's an L shaped block that will also keep the back of the action from jumping up and down while the piano is being played. In most pianos, there are three of them, left, right and center. 

    Wim





  • 3.  RE: Grand Piano dag blocks function. Can someone please explain?

    Posted 16 days ago

    I would imagine that they also have a role in holding the action in place when the piano is being moved on its side, typically on a skid. 



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    Floyd Gadd RPT
    Regina SK
    (306) 502-9103
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  • 4.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 16 days ago

    May we all please refer to them as dogs, not dags?

    In most cases, dogs do not assist in bedding the back rail of the keyframe. They do, however, keep the rear of the keyframe from lifting when the piano is placed on its side for moving. They also, in some cases, act as a rearward stop for the keyframe, locating it fore/aft in the action cavity.

    This is what grand piano keyframe/action cavity dogs do.

    The majority of pianos would work (play) just fine with them removed, once all the factory bedding of the keyframe has been performed adequately. There are instances where dogs do in fact pinch the back rail down to the keybed, but these examples are few and far between. 



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
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  • 5.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 16 days ago
    David

    I hope you're kidding. In my 47 years in the business, I've never heard of dags being call dogs. 

    Wim





  • 6.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    Wim,

    "Dag" is perhaps the most conspicuous misnomer in our profession. They are dogs, as in pinch dogs on a workbench.

    Kindly investigate the word "dag" in a dictionary. It is the fecal encrusted wool at the back end of a sheep.

    Dave



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
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  • 7.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago
    David

    Again, no disrespect, but this is the first time I've hear of the part we're describing as being called a dog. It's also the first time I've heard of it being used on a work bench. I'm not arguing with you, (I just saw a video of a guy using that word when he showed his workbench), but I just never heard of it before. 

    I guess, even after 78 years, with 47 of it being in the piano business, it's never too late to learn something new.

    Wim





  • 8.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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  • 9.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    Wim,

    In the 26+ years I have had the privilege of teaching at PTG regional and national conventions, I have presented both founded and unfounded terminology used in our industry regarding the nomenclature of piano parts and their functions, dag vs. dog being one of the many.

    Come dinnertime at these events, I can overhear conversations of those who have attended my day's class reverting to the vernacular they have employed over their long and storied careers.

    We can lead a horse to water, but...

    Sigh.

    Dave 



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
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  • 10.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    Wim,
    In the 26+ years I have had the privilege of teaching at PTG regional and national conventions, I have presented both founded and unfounded terminology used in our industry regarding the nomenclature of piano parts and their functions, dag vs. dog being one of the many.
    Come dinnertime at these events, I can overhear conversations of those who have attended my day's class reverting to the vernacular they have employed over their long and storied careers.
    We can lead a horse to water, but...
    Sigh.
    Dave 



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
    ------------------------------



  • 11.  RE: Grand Piano dag blocks function. Can someone please explain?

    Posted 15 days ago

    Dave,

    You are likely correct as dogs are widely used in woodworking and I know of no other case where dag is used except in sheep husbandry. Interesting that dogs are common in a wood shop but are not mentioned specifically as such in the on-line dictionary I use, only that they are a machinists holding tool.

    I hereby nominate you as the dog correction officer. 



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    Blaine Hebert RPT
    Duarte CA
    (626) 390-0512
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  • 12.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    I think Capo D'astro is the biggest misnomer. I was taught it is supposed to be Capo Tasto. Tasto being a fret.



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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  • 13.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    Steven,

    Re: your message #12 in this discussion of keybed dogs, we're getting off-topic, but d'astro =  the stars, i.e. "overhead" or "from above". The capo d'astro bar is an overhead foundation for anchoring the speaking lengths in the melody range and high treble section of pianos.

    David G. Hughes, RPT



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
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  • 14.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    David, the way it was explained to me was that the word "capo" (head) referred to the top of something and tasto makes it overhead fret. Which is certainly its function. Google translates capo d'astro as "star leader", maybe there's an Italian speaker that could expand on that for us.

    I hadn't looked till today but there are plenty of references on a google search for capo tasto piano.

    Maybe it's not a misnomer but just a different term.



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    Steven Rosenthal RPT
    Honolulu HI
    (808) 521-7129
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  • 15.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    Blaine,

    Re: your message #11 in this discussion: I am honored. Thank you!

    David G. Hughes, RPT



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    David Hughes RPT
    Vintage Case Parts
    Glyndon MD
    (443) 522-2201
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  • 16.  RE: Grand Piano dag blocks function. Can someone please explain?

    Registered Piano Technician
    Posted 15 days ago

    So it also seems to follow that "an old dog" can actually "learn a new trick"...yes?

    Peter Grey Piano Doctor 



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    Peter Grey
    Stratham NH
    (603) 686-2395
    pianodoctor57@gmail.com
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  • 17.  RE: Grand Piano dag blocks function. Can someone please explain?

    Posted 15 days ago

    No relation to this topic, but is there a technical term for when threads go on silly side tangents?

    -chris



    ------------------------------
    Chernobieff Piano Restorations

    "The Piano Whisperer"
    Maker of the finest maximum output piano soundboards. (Osage Orange Bridge Caps, Norway Spruce Panels, Engineered Ribs, Sustain Bar)

    Inventor of Inertia Touch Wave (Real Dynamic Inertia Control and Smoothness)

    865-986-7720 (text only please)
    ------------------------------



  • 18.  RE: Grand Piano dag blocks function. Can someone please explain?

    Member
    Posted 15 days ago

    cross threaded



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    James Kelly
    Owner- Fur Elise Piano Service
    Pawleys Island SC
    (843) 325-4357
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