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About billpentz

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  • Birthday 12/06/1948


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    Gold River, CA
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    No, I don't want my 20 year old body back, I want my wife's 20 year old body back!

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  1. billpentz

    Amped up Oneida Super Dust Gorilla (long)

    Fred, I've had both of those systems. The first like you was an Oneida Air Systems. Unlike you when I could not make it work the way it should have, I decided it would be far more fun to create mount cyclone parts in my backyard. I think I learned just about everything that can be learned about cyclones the hard way. Eventually the result evolved into my current design that you will be getting from Clear Vue. Good for you!
  2. billpentz


    Gerald, many call airborne wood dust nuisance dust, meaning it is only mildly irritating to most. By definition airborne dust particles are sized under 30-microns. For comparison a typical human hair is about 70-microns thick and we can only see down to about 10-microns without magnification. OSHA testing shows on average about 15% of the dust woodworking produces consists of airborne dust. Fine dust is defined as under 10-microns and it gets by our natural protections going deep into our lungs. Allergies are mostly made not born, meaning we develop allergies after too much exposure. Only one in seven is likely to develop severe allergies, but you already said you are susceptible because of your seasonal allergies. Your current mask will strip off two thirds of the airborne particles by weight, but that still lets one third go right through. Worse, what goes through are the fine invisible dust particles. You don't have my allergy problems, so might be able to get along fine for a long time. Frankly, has I not turned a bunch of cocobolo, rosewood, teak, and walnut pens, I probably would have only had some irritation. Turning those pretty strong sensitizing woods took me from zero allergies to a reaction that was so bad it hospitalized me. What worked for me was shifting over to a better quality filter, but I found the Trend did not have enough fan to handle the finer filter, so I ended up shifting to a far more expensive mask.
  3. billpentz


    Gerald, This is touchy as many use these and like them. However, if you look at the technical specifications for the Trend Air Shield Pro powered air purifying respirator (PAPR), the filters are as you observed, meaning little better than cheap a/c filters. I was so allergic just walking into dusty shops immediately caused me to clog up and lose my breath. Wanting to get back to woodworking I bought a Trend Air Shield because a wood turner friend recommended it if I could not find a no longer made Racal PAPR. It did not work, but I refused to give up so purchased a Triton then a Trend Air Shield Pro. Bottom line, all three left me forced to flee within minutes of any dust exposure. U.S. respirators must be tested and approved by NIOSH before they can be used as protective equipment. The Trend Air Shield Pro specifications sheet says, "Warning The TREND AIRSHIELD PRO is not a RESPIRATOR nor a NIOSH approved device." The same sheet also says, "Use for: Relief from the bothersome effects of the common nuisance dusts." The same is true of the Triton. I also tested both my Trend and my Triton filters at the university and found our fine calibrated unhealthiest under 5-micron dust went right through the filters. Upgrading to a finer 3M filter so choked the airflow I could not breathe with the Triton and Trend units. What did work was the older Racal I found then upgraded with new batteries and a 3M fine filter, my new expensive 3M Airshield, and my way too expensive 3M PAPR welding setup.
  4. billpentz


    Al, Many woods contain very strong chemicals and oils which makes them taste bad and do bad things to predators. Some woods like cocobolo, ebony and rosewood can trigger a nasty reaction in a single few hour exposure. What really surprised me was not only how quickly I developed an allergic reaction, but also extensive allergy testing afterward showed me allergic to dozens of trees whose wood I had never worked ever. My respiratory allergist said this is common as we become allergic to a whole class of trees with similar chemicals, plus once allergic many other sensitizers set off reactions quicker, plus so do many other things besides wood. The good news at least for me is after a long time with no further exposure all settled to my being sensitive to just a few woods now.
  5. billpentz


    This is an area I know a bit about. Hopefully my post is not too late for this thread. What I have to share will probably anger many, it did me as well. First, most available woodworking respirator masks work poorly. I found my Trend Air Shield and Air Shield Pro, my Triton, and even my older Racal Pro all came with fine filters that freely passed the unhealthiest finest (less than 2-micron sized) particles. Only my better 3M units had ample filters. Only my Racal and 3M had good enough seals. None had very good batteries until I swapped out what they came with and built a new pack with high amperage hour removable separately chargeable cells. I only liked the 3M and Racal blowers, as the rest gave poor airflow especially as the filters dirtied. Second, fine wood dust lasts nearly forever unless it gets wet and with every 20 pounds of sawdust, we also make enough fine dust to cause 15,119 typical two-car garage sized shops to fail an EPA air quality test. This is why Cal-OSHA testing found most small shops that vent inside have so much built up fine invisible dust that just walking around without doing any more woodworking launches enough fine dust to fail an EPA air quality test. At the OSHA measured fine dust levels most small shop workers who vent inside breathe in more fine dust in a couple of hours than most full woodworkers who work in facilities that vent outside get in months. Third, I oversaw quite a bit of serious testing of almost every major brand of shop vacuum, air cleaner, dust collector and cyclone based dust collection system. That testing showed that the prior OSHA testing was pretty accurate in almost all come with far too open fine filters and lack the airflow needed for good collection. On average most small shop dust collectors and cyclone miss collecting over 15% of the fine dust we make. With woodworking making far too much fine dust this is bad news. Finally, good collection can be tough and expensive, but good protection is fairly easy and affordable. The best protection is to wear a good properly fit NIOSH approved respirator mask with dual HEPA quality cartridges and work outside or with our main doors open a bit and a strong fan blowing out a side door or window to create a good airflow through our shops to keep the fine dust from building. Our particle counters show for best protection we need to put on our respirator mask and start venting our shop before we start making fine dust and both the mask and fan need to stay on for about a half hour after we stop making fine dust.
  6. billpentz

    BIll Pentz Checking In

    Fred, It's nice to see you here. Has been too long! Also, my thanks for your stepping up so many times and saying good things about me on the various other forums..
  7. billpentz

    BIll Pentz Checking In

    Good morning from a new/old corner. Thank you to the many who have written to welcome me to this forum. I had a bit of a wakeup call this weekend. An old friend was a pretty good hobbyist woodworker and dreamed of retiring to make woodworking his retirement passion. That was me in the late 1960s with so much work lined up I had to turn most down. That also was one of the most enjoyable times in my life in spite of being insanely busy. Knowing my background, he asked my help and I introduced him to an up and coming restraint owner. He built his ideal shop and spent many retirement years becoming a "go-to" guy for lots of custom woodworking for local restaurants. By total accident we were driving around and saw an estate sale sign yesterday advertising lots of tools. After following signs for miles I found this was my old friend's home. He was gone and I never even heard. Inside I found his broken branding iron that I helped him make from an old big American brand soldering iron. I was pretty blown away at how badly I had lost touch.

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