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  • Surface grinder dust control

    My machine room is not large, and the SG and T&CG share the same space with the other machine tools. (but at opposite ends ;-)

    Are there any comments on useful "dust collection" systems that don't fall back to harbor freight of grizzly' and still retain winter time heated air?

    Vent into a 5 gallon bucket of liquid? That's what I do with the laundry drier.

    In summer, I just blast the air out through a vent port in the wall ;-)

  • #2
    https://www.mcmaster.com/#dust-collectors/=17quvks

    Not HF or Grizzly, so hold on to your wallet.

    I have no idea how well a bucket of water would work. If you try it, I would suggest some arrangement to make the bubbles small and the bucket deep so they will have a long path to travel. Perhaps a final filter over the top.

    Perhaps a vacuum with a HEPA filter would be better.

    Good luck.
    Paul A.
    SE Texas

    And if you look REAL close at an analog signal,
    You will find that it has discrete steps.

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    • #3
      The grinders in work for samples were all in small rooms, the pipe (flex metal) went into a spark trap which was a box with a lid, inside there were about 16 metal plates, theairtravelled round those in as meandering a pattern you could get, half the plates fitted to one side of the box, half to the other, the vacuum was supplied by a DCE metallic dust extractor unit, which worked fine for steel, did not work as well for cast iron as the released free graphite passed through and choked the filter bags, in fact a good proportion on the graphite was sufficiently small to pass through the bags into the room, not good as a layer of conductive dust ended up getting everywhere in the room, occasionally shorting out cercuit boards on the spectrometer and computer in the room, I had to fit a diverted that when the samples were blast furnace iron the outlet went through a bifurcated fan and out through the wall, cleanliness improved no end, looking at the dust under the microscope, metallic off steel was actually tiny "swarf" or chips, long and often curled, suprised me a bit that grinding was as the books said a machining process at a microscopic scale, seeing is believing I suppose.
      Irons produce fragmented particulate waste. I never had non ferrous to consider as it wasn't a product.
      Used commercial dust collectors are fairly common, filter media aka bag filters are a bit pricy but the cloth ones have a considerable life with steel, I found a home made magnetic interceptor worked well, strip magnets were bonded to a plate (ex photocopier or laser printer I think, 12" X 3/4" X 1" ), that was dropped in a plastic bag and the airflow passed over it, most of the metallic dust picked up to it and the bag could be changed by turning inside out to clear the magnets.
      I've never tried cyclone seperators myself.
      Mark

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      • #4
        I simply run a shop vacuum with a long hose connected to the hood mounted on the left side of the SG table. No problems so far. If I ever need to upgrade, I'd go with an ash vacuum cleaner.
        Mike
        WI/IL border, USA

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        • #5
          Cyclone dust separator to collect most of the crud and extinguish possible sparks, followed by shop vac or good household canister vacuum with hepa filters?
          Location: Helsinki, Finland, Europe

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          • #6
            The best dust reduction technique I have found is to grind wet.
            Yes you have to scoop out the disgusting black sludge from the end tank and the suds resivoir but its better there than on your machines.

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            • #7
              Originally posted by MrFluffy View Post
              The best dust reduction technique I have found is to grind wet.
              Yes you have to scoop out the disgusting black sludge from the end tank and the suds resivoir but its better there than on your machines.
              That is the best way to control the dust, none better. But most of us HSM guys don't use coolant because our machines aren't used on a daily basis.

              This is what I rigged up for my grinder. It catches about 90 % of the dust. Grinding isn't the big issue it's dressing the wheel.




              I have a similar setup for my T&C grinder that I'm still working on. The problem there is there isn't much room for the shoot or funnel like there is on the surface grinder. If I re-position the head then I have to re-position the collection shoot and there isn't any room to play.

              JL................
              Last edited by JoeLee; 05-23-2017, 08:28 AM.

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              • #8
                What comes off the grinder. From careful observation of grinding fines (yes, I know, living the dream) I'm of the opinion that almost all is chips with very little abrasive material. Except when dressing, when abrasive goes everywhere.

                So, the best way to deal with the grinding fines is flood coolant. Best way to grind period - better finish, work doesn't grow and wheel is a lot less prone to clogging. That doesn't help much all with the spray of grit when dressing which is where the real potential damage to neighbouring machines comes from. I too suffer from lots of machines crammed together

                This is in the idea phase, but I've been thinking of making some sort of removable sheet metal 'trap' to position around the wheel and dresser that captures the abrasive spray. With flood used during regular grinding, the only nasty bit is dressing....which such an attachment might address
                Last edited by Mcgyver; 05-23-2017, 09:14 AM.
                in Toronto Ontario - where are you?

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                • #9
                  What supplys the vacuum

                  Originally posted by JoeLee View Post
                  That is the best way to control the dust, none better. But most of us HSM guys don't use coolant because our machines aren't used on a daily basis.

                  This is what I rigged up for my grinder. It catches about 90 % of the dust. Grinding isn't the big issue it's dressing the wheel.




                  I have a similar setup for my T&C grinder that I'm still working on. The problem there is there isn't much room for the shoot or funnel like there is on the surface grinder. If I re-position the head then I have to re-position the collection shoot and there isn't any room to play.

                  JL................
                  JoeLee,
                  What are you using the supply the vacuum and hold the dust?

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                  • #10
                    @JoeLee

                    That is one beautiful machine.
                    12x16" Delta 3d printer (Built from scratch)
                    Logan 825 - work in progress
                    My Blog - http://engineerd3d.ddns.net/
                    Youtube Channel - https://www.youtube.com/channel/UCVY...view_as=public
                    Instagram - https://www.instagram.com/engineerd3d/?hl=en

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                    • #11
                      Originally posted by MichaelP View Post
                      I simply run a shop vacuum with a long hose connected to the hood mounted on the left side of the SG table. No problems so far. If I ever need to upgrade, I'd go with an ash vacuum cleaner.
                      I recently did this exact thing in my shop. I had to raise the inlet for the shop-vac to a height that wouldn't suck up the coolant, but I'm seeing and sniffing a lot less airborne particulates.

                      Dan L
                      Salem, Oregon

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                      • #12
                        This is the dust collector vacuum unit that I use on my SG. It's not really a vacuum, it doesn't have much pull. I think it originally was one of those tings that the nail salons use to wisk away the smell of the nail polish and nail filings, Ha, Ha.
                        It's not a good design for dust since it pulls all the abrasive crap through the squirrel cage blower and the motor bearings eat most of it. It does catch a lot of dust. I made a pre-filter out of some PVC pipe fittings that go in line. There are a couple filter discs that I made out of an old furnace filter. Most of the stuff gets stopped right there.




                        This is what the inside looks like. The remainder of dust that gets past the in line pre-filter stops here.
                        Hey.... it's easy to clean out.



                        Here is the pre-filter. If you look close you can see a couple filter discs sitting on the floor next to it. Those are what I put inside. I think I staked three of them in there.



                        JL.......................

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                        • #13
                          This is the other one I've been working on..... for the past 4 years or so. I think this one was one of those dental vacs. It has a real Electrolux motor in it, has good suction. I modified the inside to take a dust bag. I used the bag cage from an old vac and made some mounts for it on the bottom of the compartment.







                          JL..................

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                          • #14
                            This is the mount I made for the T&C grinder. It's a real tight fit as I have little room to fit anything in there.



                            I'm not sire if I'm even going to be able to hook the vac hose up to it.



                            I tried to make the mount as versatile as I could to try and accommodate the various positions of the grinder, but I think there is still going to be a few positions and set ups that I won't be able to use it on. As long as I can dress the wheel into it I wold be happy.



                            JL...................

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                            • #15
                              +1

                              Looks like it was just uncrated

                              Very nice!

                              Sent from my SM-N910V using Tapatalk

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