Pianotech

  • 1.  Hammer iron temperature

    Registered Piano Technician
    Posted 08-13-2018 21:50

    Hi all, 
    A quick question about temperature for the standard brass hammer iron that attaches to a soldering iron:

    I attached the iron to a Weller 40-watt soldering iron. On the first sample hammers, the iron worked great to get a neat finishing touch.
    However, after a few minutes, I started getting burn marks. I guess it worked well before it reached its max temperature (which is advertised at 900 F on the package). Thinking it could be something on the iron, perhaps some residue after manufacture, I cleaned the iron with metal cleaner. Then I let it warm up for a good 20 minutes. This time, with the iron at full temp, it burned the hammers almost immediately.

    Is the answer simply to get a dimmer? Pianotek sells a kit of soldering iron, tip, and dimmer. Dimmers are also available separately if you just need that part. It's called a Dial-Temp by Hot Tools.

    If you use this dimmer, what setting do you find gives the right temperature to do the job without scorching the hammers? If you use it for steam voicing, what temp do you use?

    thanks,
    Scott



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    Scott Cole, RPT
    rvpianotuner.com
    Talent, OR
    (541-601-9033
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  • 2.  RE: Hammer iron temperature

    Posted 08-14-2018 07:31
    Trial and error. There might be recommendations in the instructions. I have a old Esicontrol from either American or Schaff. For hammer ironing I set it between 50~60. For finish touch up, burning in it's set at 30~35.

    You definitely need a rheostat for controlling the temperature.

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    Regards,

    Jon Page
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  • 3.  RE: Hammer iron temperature

    Registered Piano Technician
    Posted 08-14-2018 11:26
    Scott,

    Back when I designed the Key Bushing Iron I tried various devices for this and ultimately settled on the little in-line dimmer that Pianotek now sells. It is a Leviton unit. Not very expensive. Wire it in yourself. Then make marks on the dial for your preferred temperature points (after experimentation).

    Or just buy the whole KBI. (I get nothing out of it BTW).

    Pwg

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    Peter Grey
    Stratham NH
    603-686-2395
    pianodoctor57@gmail.com
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  • 4.  RE: Hammer iron temperature

    Registered Piano Technician
    Posted 08-15-2018 21:22
    This is what I was taught by a very talented voicer: Plug the iron in (I have a Schaff plug-in iron). Stay with it - as it warms lick your finger and quickly touch the iron. As soon as it hisses when you touch it unplug it. Then you can begin ironing. Check it from time to time to see if it still hisses. If it cools off plug it in again briefly until it hisses again when touched with a wet finger. I can usually finish a set of hammers before it cools but your results may vary!

    Erich Borden, RPT




  • 5.  RE: Hammer iron temperature

    Registered Piano Technician
    Posted 08-14-2018 11:16
    I carry a small travel iron, like for clothes, in one of my cases. For ironing hammers I turn it up to about what I would want for a cotton shirt with steam, (but I don't add any water to the iron), and work fairly quickly. Place a damp towel between the iron and the hammers and you can use the same setting for that quick steam treatment when you want to bring the hammers down a bit.

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    Geoff Sykes, RPT
    Los Angeles CA
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  • 6.  RE: Hammer iron temperature

    Registered Piano Technician
    Posted 08-14-2018 12:06
    You need a rheostat for that to control the heat. n They are available on line.  Plug the rheostat into the socket and the soldering iron into the rheostat. Set it at about 50% or wherever you need to to control to the level you want.  You shouldn't be burning the hammers.  I only use irons to smooth felt and that's a pretty low setting.  

    I don't steam hammers but there you can go higher so that the contact with the hammer iron produces instant heat, like the high setting on a steam iron.

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    David Love RPT
    www.davidlovepianos.com
    davidlovepianos@comcast.net
    415 407 8320
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  • 7.  RE: Hammer iron temperature

    Registered Piano Technician
    Posted 08-14-2018 22:14
    Back in the Cretaceous era when irons for bushings were a new thing I was told that one should keep the temperature not much higher than the boiling point of water. This was because temperatures in excess of 250 degrees or so can damage the felt fibers. A little trial and error with my Dial-a-Temp  and a few drops of tap water yielded one mark with a paint pen for the setting I use with the Key Bushing Iron and another with a sharpie for the setting for the hammer iron attachment.

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    Karl Roeder
    Pompano Beach FL
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