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  1. DelPiero1 is offline

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    Posted On:
    4/18/2010 12:03pm


     Style: Hop Gar/CLF/Balintawak

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    Hell yeah! Hell no!

    Brass rings for arm conditioning

    Anyone have an idea if the brass rings that are used by Hung gar practitioners contain lead or other harmful metals?(cadmium, nickel..) I purchased a set a couple of years ago and now I am wondering...particularly after the recall of products from the PRC containing such metals. Wikipedia does state that lead tend to migrate to the surface of brass as well. Any info let me know.
  2. ChenPengFi is online now
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    Posted On:
    4/18/2010 12:11pm

    Join us... or die
     Style: Hung Gar, Choy Lay Fut

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    Hell yeah! Hell no!
    Quite possible.
    Since you already have a set you might get one of these test kits.
  3. DelPiero1 is offline

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    Posted On:
    4/18/2010 5:59pm


     Style: Hop Gar/CLF/Balintawak

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    Hell yeah! Hell no!
    Thanks for the link. I will give this a try.
  4. ChenPengFi is online now
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    Posted On:
    4/18/2010 7:34pm

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     Style: Hung Gar, Choy Lay Fut

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    Hell yeah! Hell no!
    Check across the welds especially.
  5. DelPiero1 is offline

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    Posted On:
    4/18/2010 9:39pm


     Style: Hop Gar/CLF/Balintawak

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    Hell yeah! Hell no!
    I will check them, I assume they are along the outer circumference of the ring. I was actually under the impression that they are cast in say a sand mold in one piece from molten brass?
    On a separate note I did have one crack recently and had to refill the crack by filing the crack open and then filling it in using a propane torch and some tin-silver solder. Seems to be holding up well. That particular ring had an air void in it that I believe lead to the fracture.
  6. ChenPengFi is online now
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    Posted On:
    4/18/2010 9:54pm

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     Style: Hung Gar, Choy Lay Fut

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    Hell yeah! Hell no!
    They are usually a rod bent into a ring then welded.
    I am surprised that you were able to fix it, brass is notoriously hard to mend as the percentages of the alloy could be all over the place.
    They might give off whitish smoke when heated for solder, this stuff is usually the zinc and should not be inhaled.
  7. DelPiero1 is offline

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    Posted On:
    4/19/2010 7:15am


     Style: Hop Gar/CLF/Balintawak

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    Hell yeah! Hell no!
    I had to do quite a bit of cleaning to get a good bond as you might guess. I filed the crack open, polished it with 180 grit sandpaper, cleaned it with acetone and then treated the area with dilute hydrochloric acid.
    I did not see any zinc fumes but I am assuming that is because the solder flow temperature is 240C (approx 480F) below the zinc evaporation threshold.

    I was not aware that they are made from brass rod. It makes sense that the stress crack occurred along the welded seam. I am not looking forward to nine more fractures though. I have even started looking into molding my own rings by sand casting.

    Thanks again for the info.
  8. ChenPengFi is online now
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    Posted On:
    4/19/2010 10:51am

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     Style: Hung Gar, Choy Lay Fut

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    Hell yeah! Hell no!
    Gotcha, sounds like you have handled a torch a few times before, plumber? Welder?
    I was picturing someone with a Costco mapp gas kit roasting the crap out of one of those rings.. :)

    If you do decide to cast, i am sure you realize the brass will certainly give off zinc smoke, so have ample ventilation.

    I could see a cottage business there.
  9. DelPiero1 is offline

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    Posted On:
    4/20/2010 7:36am


     Style: Hop Gar/CLF/Balintawak

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    Hell yeah! Hell no!
    I worked mostly with glass in the past. I think I'll post a pic of the ring once I find a camera.
  10. ChenPengFi is online now
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    Posted On:
    4/20/2010 10:58am

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     Style: Hung Gar, Choy Lay Fut

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    Hell yeah! Hell no!
    Cool, ftr i did ask a metal worker friend of mine about lead in brass and your concerns are indeed well warranted.
    Even here in the US, brass rod can often have lead in it.
    Whatever method was originally used to join the ends is suspect as well.
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