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Thread: FIRE HAZARD with CBN wheels

  1. #16
    That Baleigh DC looks nice for industrial purposes, but out of range for most home shops..... Hmm, maybe a call to them might inspire them. I will have probably 4 grinders in the new shop, but still don't need that kind of air flow...

    robo hippy

  2. #17
    Join Date
    Jan 2010
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    LA & SC neither one is Cali
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    Quote Originally Posted by Reed Gray View Post
    That Baleigh DC looks nice for industrial purposes, but out of range for most home shops..... Hmm, maybe a call to them might inspire them. I will have probably 4 grinders in the new shop, but still don't need that kind of air flow...

    robo hippy
    Mr. Hippy, or may I call you Robo... I have always loved that nick.

    I didn't really search for a more hobby centric solution but I bet there are more reasonably priced ones, Grizzly has lots of metal working machines for example. I know Baldor used to make a simple one that mounted to the back of grinders, it looked like a small DC fan used metal ducting and had a bag that I assume was fireproof. They may still make it but it would still be expensive. But a HF DC, some metal ducting and one of these bags would seem to suffice. The popularity of bladesmithing has produced a ton of belt grinder builds on youtube and some have built associated metal dust collection systems.


    I looked Grizzly ha s a couple this is one http://www.grizzly.com/products/Meta...ollector/G0818

    The manual and exploded parts diagram might help reverse engineer one and allow someone to buy any parts that might be difficult to fabricate or locate.
    5,306 miles from where the greatest things with 4 wheels are born
    5,328 miles from where the greatest things with 2 wheels are born
    5,301 miles from where the greatest things with 2 wheels and a band are born
    Seems to be more than a coincidence to me...

  3. #18
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    Sep 2010
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    This happens on my WorkSharp if I allow the metal filings to build up under the glass wheel. Ignites where the iron touches the sandpaper and takes about 5 seconds to burn to the other side. No smoke, just a red glow.

  4. #19
    Friction is a hot lady with a mean temper. A few years ago, I was working on a piece of farm machinery Between the cleaning solution, steel wool, metal shavings and angle grinder, I managed to catch the lawn on fire. I do not do anything that creates sparks indoors. My shop grinder is on a wheeled stand and goes outside to sharpen tools. We already lost one house and shop to an electrical fire. We'll take no chances. I thought Mrs. was gonna kill the daughter for having a candle lit last Christmas.

  5. #20
    I have been chatting with Oneida (dust collection if you don't know...) and mentioned the problem we are having with metal dust. The clerk was not familiar with it, but said he would pass the info on to the engineers. We really need some thing affordable for the average shop. There is a shop vac in just about every shop.....

    robo hippy

  6. #21
    This happens to me quite often. I keep a ketchup bottle with a pinhole filled with coolant. I just give it a little squirt when I see the little moving glow. The first sign of this starting is horrid smell. If you let it keep going it usually burns out.

    This happens most with my surface grinder or my 12 inch fibre chopsaw. Sometimes I get little Christmas trees growing and they burn brightly at the top of the tree.

  7. #22
    Join Date
    Jan 2010
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    LA & SC neither one is Cali
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    I mentioned this to my cousin who is a bladesmith and he said either make a spark bong or use a Nordfab or similar spark arrestor.

    The spark bong is a metal Dust Deputy on a steel trashcan with a few inches of water in the bottom.
    5,306 miles from where the greatest things with 4 wheels are born
    5,328 miles from where the greatest things with 2 wheels are born
    5,301 miles from where the greatest things with 2 wheels and a band are born
    Seems to be more than a coincidence to me...

  8. #23
    Join Date
    Feb 2008
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    E TN, near Knoxville
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    Quote Originally Posted by Van Huskey View Post
    I mentioned this to my cousin who is a bladesmith and he said either make a spark bong or use a Nordfab or similar spark arrestor.

    The spark bong is a metal Dust Deputy on a steel trashcan with a few inches of water in the bottom.
    Someone sent me links to a spark bong a guy built. His first tries sucked the water out of the can. He reported that replacing the water with corn syrup worked better but didn't report on long-term use.

    My 5hp cyclone will probably pull the head off a cat so I would have to experiment.

    JKJ

  9. #24
    Join Date
    Mar 2013
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    Eastern NC
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    Quote Originally Posted by John K Jordan View Post
    . ...pull the head off a cat...
    JKJ
    Now that's a vivid image!

  10. #25
    First let me say thanks John for bringing this to our attention. I have worked with many metal shops and welded the first half of my life and I have seen plenty of glowing piles of metal from chop-saws grinders and belt grinders. My concern is using a dust collector that is used to collect wood simultaneously catching metal dust. Any dust will ignite, just ask the local grain elevator. Wood in small bits mixed with metal, I would be concerned about that. The problem is it could smolder for a long time before it burnt your shop down. That would be terrible, i'm sure you would agree. I would suggest a separate system for the metal dust or come up with some kind of filter barrier down stream. If your system will pull a cats head off it would pull air through a filter. Maybe a thien baffle, small set up, to a screen to a filter or system of filters to a blast gate. Just make sure no, zero metal gets to the impeller. Maybe a filter system could be incorporated on the outlet of the thien set up. I'm sure if one is already made Van will find it.

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