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Gluing on wippen heel cloths

  • 1.  Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 17:33

    Greetings,

    It has "been a minute" (read: DECADES) since I last replaced wippen heel cloths (AKA capstan cloths). Back then, under the tutelage of my first master of high-end piano work, Keith Hardesty (OBM), after thoroughly cleaning off the remnants of the previously used glue and cloth, we would use a hot glue gun to attach one end of the replacement cloth on each wippen heel. Glue gun glue sets quickly so, once through, we would go back and glue down the other ends, maintaining tension on the cloth until the glue sets (a matter of seconds, as I recall). Before endeavoring to do this again after all these years, thought I would inquire if anyone has experience to support a different adhesive for this and/or a different protocol.

    Thanks,

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------


  • 2.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 18:49
    As you might guess, I use hot hide glue. Relatively thick. Same procedure.

    Regards,
    http://fredsturm.net
    www.artoftuning.com
    "Education is not preparation for life; education is life itself." John Dewey






  • 3.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 19:39

    Don't forget the little 'helper' felt, usually red, underneath the thicker main felt. Helps to maintain rounded cushion longer. You will see this on older Steinway parts.

    Omitted sadly by most vendors today.



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    Parker Leigh RPT
    Winchester VA
    (540) 722-3865
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  • 4.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 20:12

    Thanks for bringing this up, Parker.

    The piano in question is Mason & Hamlin model A from 1933 (yes, the same instrument referenced in my thread about gluing backrail cloth, for those of you keeping score). The bottom of the wippen heel is a curved surface, but the original had no "helper" cloth.

    I am considering adding the helper cloth as per your suggestion. Might there be any downside to that? Glue it on? Or just capture it under the tension of the larger piece?

    Thanks,

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 5.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 20:04

    Yes Fred, I would have guessed that you use hide glue.

    When gluing the second end of the cloth, any idea of how much time thick hide glue needs to set until it will hold the cloth under tension?

    Thanks,

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 6.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-12-2025 20:51
    Hide glue is close to instant. Pull it tight, press down for a few seconds, move on to the next. 
    Regards,
    Fred Sturm
    fssturm@comcast.net
    Youtube Spotify Deezer Apple Amazon
    http://fredsturm.net
    www.artoftuning.com
    "Art lives from constraints and dies from freedom." Leonardo

















  • 7.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-13-2025 08:59
    Alan 

    I taught a class on this at SCRC and also recommended Hide glue. I glued one end on sets of 22 because of limited workbench space. You can get through all 88 this way. By the time you have done all of them, the glue is set enough to start the other side. I find that pulling them tigh and using a rubber band works well. I cut the cloth a little longer than needed and flush trim with nippers the next day when everything is completely dry.

    I also demonstrated replacing the drop screw contact felt/leather at the same time.

    Norman Cantrell 





  • 8.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-14-2025 07:47

    Thanks for this, Norman.

    Do you feel that without the rubber band, the tension in the heel cloth would not have been maintained?

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 9.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-14-2025 08:04
    Alan 

    The set I was doing had the small under felt, which I did not replace, but it does cause a hump in the cloth. The rubber band helped clamp the free side in place. I do feel having the stretch consistent from wippen to wippen will give a more consistent regulation.  We all are a little OCD in this business, it just depends on which gnat we choose to strain out of our lives.

    Norman Cantrell 





  • 10.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-14-2025 08:12

    Norman,

    As someone once said, "You don't have to be obsessive /compulsive to be a piano technician, but is sure helps!"

    Ed Whitting, RPT, and I will be offering a class at the national convention, the sub-title of which is: "Mirco Changes That Yield Marco Results." IOW, big improvements can be made by "sweating the small stuff," ALL of it!

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 11.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-13-2025 22:12

    We use a modified keytop spring clamp.  The flat side of the clamp is reshaped to a curve to match the whippen heel felt – the curve caused by including the red center underlay felt.  The underlay felt also acts as a glue barrier, keeping glue from wicking into the heel felt.  We coat the entire whippen heel with hide glue, place the underlay felt in the center, then place the heel felt over top, exposing the ends to the glue.  The clamp then holds it all in place with the curve on the felt on and the slot end placed near the jack bottom on the whippen body.  We have a dozen clamps and by the time we reach #13, the first is set up enough to remove.  Fast and consistent. Gotta love hide glue, sets up quickly and is easily removed for the next technician.

     

    Rick

    ___________________

    Rick Florence

    Manager, Keyboard Technology and Event Services

    Arizona State University

    School of Music, Dance and Theatre






  • 12.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-14-2025 07:51

    Thanks for this great idea, Rick!

    I take it that you do not feel there is anything significant lost by the heel cloth not being stretched and, therefore, under tension?

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 13.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-15-2025 10:41

    If the felt is cut to the proper length, the pressing creates a very stable whippen heel.  We have not experienced any regulation issues.

     

    ___________________

    Rick Florence

    Manager, Keyboard Technology and Event Services

    Arizona State University

    School of Music, Dance and Theatre






  • 14.  RE: Gluing on wippen heel cloths

    Posted 05-15-2025 08:31
      |   view attached

    I have found that hide glue works best, especially if you are in a controlled environment such as your shop. I understand why people would use other glues if in the clients Living room. I have reversed many sets of cloth, leather, or felt when someone used a hot glue gun. In my opinion the glue in a hot glue gun is too thick even when hot, and it cools before it can penetrate cloth, leather, or wood making for a weak glue joint at best. Electrical tape works well when gluing odd shaped parts and has some stretch and pull to it similar to an elastic. Glue the red piece of cloth in the middle, a line of glue on the inside corners of the wippen heal, use an inch of electrical tape and let it set overnight, peel the tape and it is perfect.



    ------------------------------
    [Michael] [Morvan]
    [Blackstone Valley Piano]
    michaelmorvan9@gmail.com

    [Uxbridge] [MA] 01569
    [508-340-6443]
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  • 15.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-19-2025 11:36

    Great tip about the useful properties of electrical tape in this application, Michael, and your critique of hot glue gun glue. Thanks for that!

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------



  • 16.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-17-2025 10:45

    Hi Allen, I hot hide glue the ends of the cloth to the heel flat and then pull the cushion strip through of a chosen thickness.

    All the best



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    Mark Adams RPT
    Solana Beach CA
    (858) 583-3333
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  • 17.  RE: Gluing on wippen heel cloths

    Registered Piano Technician
    Posted 05-17-2025 15:20

    So good to hear from you, Mark!

    Your approach is a corroboration of what I was coming around to in my own mind.

    Best,

    Alan



    ------------------------------
    Alan Eder, RPT
    Herb Alpert School of Music
    California Institute of the Arts
    Valencia, CA
    661.904.6483
    ------------------------------