CAUT

  • 1.  Grinder/buffer?

    Registered Piano Technician
    Posted 05-28-2023 10:41
      |   view attached

    Hi all,
    The Journal is planning a series on the basics of setting up a shop. I'm hoping to get input from a wide variety of techs, as I'm sure everyone's shop looks a little different. Stay tuned.

    I'd like to address one question for myself, and I'm sure others will have the same question: have you been able to get by with one machine doing both grinding and buffing? I have a tiny shop, about 9x10', so I have limited room for power tools.

     Currently, I have an 8", variable speed grinder, and I've replaced one grinding wheel with a buffing wheel. My primary tasks are buffing ivory keys and tool mods. 

    Have you been able to get by with one machine, or is it a better idea to have two dedicated ones?
    do you prefer one size over another-6" vs 8"? I assume a variable speed unit is preferred, at least for buffing ivory.

    thanks!



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    Scott Cole, RPT
    rvpianotuner.com
    Talent, OR
    (541-601-9033
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  • 2.  RE: Grinder/buffer?

    Posted 05-28-2023 13:30
    Hi Scott-

    I would suppose that depends on the size of the shop and how many people are working together. I had no problem using one tool for both. I didn't actually do much power grinding and did that stuff by hand with a file. The photo you shared looks nice.  

    Best,
    Dennis. 





  • 3.  RE: Grinder/buffer?

    Registered Piano Technician
    Posted 05-28-2023 14:06

    You can make a fine ivory buffing system using a 12 x 12 x 1  piece of hammer felt mounted on a block of round hardwood mounted on a shaft and driven by an old washing machine motor.  This gives you a dedicated system of the correct speed.  We had one at Steinway when I worked there.  Frank Stopa used a similar
    system.



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    Parker Leigh
    Winchester VA
    (540) 722-3865
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  • 4.  RE: Grinder/buffer?

    Registered Piano Technician
    Posted 05-29-2023 17:26
    Scott

    I have a Rockwell Radial drill press that allows the head to swivel 90 degrees. In my small 450ft first shop it was my buffer. With 5 belt speeds I had options and I used a motor arbor to hold the buffing wheels and chucked it into the drill press. I could also use a wire wheel on the arbor as well. I use two cloth wheels, one with red jewelers rouge for brass and a white wheel with buffing compound for keytops. 

    My grinder is still a typical 2 wheel grinder for metal but I clamp it to the workbench when I need it. Otherwise it lives on a shelf out of the way.

    If you want a dedicated buffing set up look for an electric motor from a player piano ( reproducer).  They turn at 1150 rpm which is a bit better than a typical 1750 rpm motor.

    Norman Cantrell 





  • 5.  RE: Grinder/buffer?

    Registered Piano Technician
    Posted 05-29-2023 15:51

    I have used my variable speed drill press for buffing for years.

    I use it at the lowest speeds and get less overheating and damage to plastics.  I find that most grinders, even variable speed ones don't go slow enough for me.

    It saves on shop space too.



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    Blaine Hebert RPT
    Duarte CA
    (626) 795-5170
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