The air challenge/saga continues: Respirators?

[Tim Allaire]

Although uncomfortable and annoying (not just flimzy dust masks--I mean real deal respiratiors), respirators seem to be a clear advantage during the machining process; no?! As I got caught up in the "data" of the Dylos debate, it seems to me that if we had a way to protect ourselves during peak "cutting" times that would deter health issues, while "air-scrubbers" worked on the nonpeak times (and dust collection being a no-brainer). Any suggestions on resipirators? Forced or non-forced? 3M or other brands? Is the comfort worth the risk of health?

Tim Allaire

[Wilbur Pan]

I've got the Quicklatch Pro made by AO Safety. It's $30 on Amazon, comes with P100 cartridges, and I've worn it for up to 3 hours without problems. It's very comfortable and very adjustable.

[Steven Wilson]

Yep, you should have a respirator around the shop. I have a 3M 1/2 mask (7000 model IIRC) that is comfortable, seals my face, and has a fair number of options for filtration (P100 filters, organic vapor, etc). I use mine when applying pesticides, finishing (lacquer, shellac especially), and anytime that I'm creating dust that can't be collected properly (using a router handheld). I also have an older 3M full face shield with nusance dust filtration that I use while turning. I'll probably ugrade that to a Trend Airshield sometime

[Jim Becker]

Frankly, I only use my respirator when spraying shellac and water borne finishes. I'll sometimes use a Dust-B-Gone mask when machining something "in my face" and I also have a Trend Airshield for use at the lathe. But I'll certainly agree with Steven that you should have something to take care of these needs...and it's likely that there isn't just "one" solution for every need.

[Will Blick]

Tim, I share your thoughts.... this Dyson thread really helped us understand when the serious dust occurs, and how fast it settles. So at a bear min. we should wear a respirator while making dust and shortly thereafter. Then, as you mention, we let the scrubbers, open doors, exhaust fans, or whatever clear the rest out, or allow the heavy stuff to settle. Overall, its a strategy I can live with - and based on what we learned, it seems sensible.

Although, I would like to know how people wear safety glasses with these respirators? The 7500 respirator comes up so high on the nose, no place for the safety glasses to sit on my upper nose?

[Steven Wilson]

Will, I don't have any problem wearing my safety glasses with the 3M 1/2 respirator. Just spend some time and select one that fits. As for the full face, powered respirators like the Trend, they're just a nice to have item, not really necessary. Having a decent respirator like an AOSafety or 3M is a necessity. They aren't that expensive and are useful for things other than making dust.

[Todd Franks]

Although, I would like to know how people wear safety glasses with these respirators? The 7500 respirator comes up so high on the nose, no place for the safety glasses to sit on my upper nose?

Will,
I wear both prescription glasses and the wide over the glasses type safety glasses (I'm in the process of getting real prescription safety glasses). I have the older 3M 6000 series respirator that uses the same P100 & organic vapor filters that the 7500 respirator uses. I'm not familiar with the fit of the 7500 but I've never noticed the 6000 giving me any issues with 2 sets of glasses.

-Todd

[Jim Becker]

Although, I would like to know how people wear safety glasses with these respirators? The 7500 respirator comes up so high on the nose, no place for the safety glasses to sit on my upper nose?

When I wear my AO Safety respirator when spraying, I cannot wear my normal "cheater" safety glasses due to the nose piece, but another pair of plain clear ones I keep in the shop for guests will work with it. If I were forced to choose...the glasses would get first billing every time...

[Matt Mutus]

Tim - I worked for years in a job where I had to wear a respirator many long hours at a time. You get used to it. I used the 3M (forget the model number - probably the same everyone else uses).

Yeah I sure do think the comfort (or lack of) is worth while compared to health risks. That said I was in a place with fumes and particles floating around far worse than wood. But the principle is still the same.

A lot of people leave respirators laying around or hanging on walls. That is wrong, they need to be stored in an airtight container when not in use. Usually they come in bags that reseal for this reason. Keep them clean and change the filters once in a while. ANd understand there are some fumes that respirators will not protect you from - I don't think this applies much in a wood shop - but you should read the specs anyway. Only then would forced air make sense IMO.

[Will Blick]

> I cannot wear my normal "cheater" safety glasses due to the nose piece,

ahhhh, I use these Cheater safety glasses most often, maybe that is my problem. I need to experiment with a few different kinds of non-cheaters, so they can ride the big hump on the 3m 7503 nose bridge, and still be somewhat concentric with my eyes. Thanks guys.

[Jim Becker]

Will, the "cheap" cheaters I have will actually work with the mask, but I hate them with a passion...the "cheater" part is too small and doesn't cover the whole bottom of the lens. The ones I normally use are wire-frame and have those little "things" (adjustable pads) that sit on your nose. Those are not compatible with my respirator. Fortunately, for spraying finishes, I don't need to read measurements even once, let alone twice! :) The basic safety glasses I use with the respirator came with one or more of my Accuset pneumatic guns, but I've seen the same ones with a variety of logos on them.

[Wilbur Pan]

When I wear my AO Safety respirator when spraying, I cannot wear my normal "cheater" safety glasses due to the nose piece, but another pair of plain clear ones I keep in the shop for guests will work with it. If I were forced to choose...the glasses would get first billing every time...

I'm not sure what "cheater" safety glasses are, but I can wear these glasses (http://www.woodcraft.com/family.aspx?FamilyID=5943) with my AO Safety respirator.

[glenn bradley]

I wear an AO Safety single cartridge. Sorry I don't recall the number just now but Mark Singer put me onto it. There only about $14, are OK with glasses and muffs. I use it when routing MDF or any other particularly nasty chore.

[Danny Thompson]

AO Safety "pig snout" mask. They never fog my prescription glasses or the safety glasses I wear over them.

[Andrew Nemeth]

I too use the 3M respirator when needed. Unfortunately, I don't always think about putting it on unless I can smell something, so I end up using it primarily for fumes and fine aerosols caused by spraying and finishing or when I am putting out A LOT of dust. That being said, I probably should use it more than I do.

3M used to offer several mask sizes when I used to buy them from a paint supply store but I don't recall seeing the sizing option in the BORG. It may be there but I don't know, 3M might not even offer the option anymore. I liked the fit of the small mask which works well with any glasses I have worn (both prescription and safety). The rubber seems a little thinner and more flexible giving me a more comfortable fit and feels a little less bulky.



A lot of people leave respirators laying around or hanging on walls. That is wrong, they need to be stored in an airtight container when not in use. Usually they come in bags that reseal for this reason.

As for storage, Matt is right in that the ability for the filter to remove or reduce fumes is related to how long it is exposed to air (or fumes). If you just leave the respirator out it will loose the ability to reduce fumes but it should still work just fine for dust (anyone, please correct me if I am wrong here). I usually use my new respirators for painting and finishing and I store them in an airtight bag or container. When I am no longer confident they are still good I retire them to the dusty work. If I replace the cartridge I treat it as new again.

As for cheap dust masks, I don't even bother. IMO they don't create a good enough seal to be effective. If it is worth putting on a dust mask it should be worth putting on a respirator.

[Todd Jensen]

You gotta just get used to wearing one, whether its a cheap disposable or a nice one - it'll really save you in the long run. I'm borderline multiple chemical sensitivity from my usmc experience(oil fires in the gulf) and blowing off protection in a production millwork environment. I can tell you this, once its gone, its gone, as far as your tolerance goes. JMHO, and I don't believe the dust settles any faster than 8 hours even with a scrubber and fans - you've got to assume its there.

[Jim Becker]

I'm not sure what "cheater" safety glasses are, but I can wear these glasses (http://www.woodcraft.com/family.aspx?FamilyID=5943) with my AO Safety respirator.

They have a "bifocal" type setup as I need reading lenses for close work. I have several different types. Most of the off-the-shelf versions have a close work area that is too small for my preferences. The one pair I have that I do like will not work with the respirator due to the nose pads...they are not one-piece specs like those in your link. The ones I use with the respirator are single vision and "similar" to those in your link.

[Will Blick]

> You gotta just get used to wearing one, whether its a cheap disposable or a nice one - it'll really save you in the long run. I'm borderline multiple chemical sensitivity from my usmc experience(oil fires in the gulf) and blowing off protection in a production millwork environment.


Todd, what were you exposed to in the production millwork environment?




> I can tell you this, once its gone, its gone, as far as your tolerance goes.


gosh, do i agree with this.... I do suffer from multiple chemical sensitivities, and am ultra careful with everything I handle. Somehow the wood dust issue evaded me for some time, hence the value of these forums. Modern science has not even scratched the surface on the effects environmental pollutants have on our neurological system. A case in point is many of the "first responders" at Ground Zero, (911) now suffering terribly from multiple chemical sensitivities. Some are completely disabled by their condition, while others suffer daily, unfortunately, some have died. When you are young and healthy, one can't fathom life with all these daily problems brought on by MCS. Thank you Todd for your service to our country.

[Tom Walz]

FYI

The source for smoke testing tubes for respirators is:


RAE
Irritant smoke
888 723-8823
3775 N. First st.
San Jose, CA 95134-1708
Tel: 408 952-8200
Fax 408 952-8480


We use them for respirators and shop air flow.

[Michael N Taylor]

I use the 3M 7500 and it is very comfortable and not very expensive. I bought the mask for $16 online and the cartridages were $4.25 for the better ones.

[Harry Hagan]

Here’s a system I’ve used once when spray painting indoors without being able to properly vent the area. (garage-sale find)
Hobbyair 1:
https://secure.foxvalley.net/axispro_com/OCCS/Default.asp?Func=DisplayProduct&ProductNumber=HB01


I used the Air Supplied Painting Hood to keep the paint off my head, face, and glasses. It also comes with a half facemask that will be useful for exposure to airborne particulates that won’t adhere.

Air Supplied Pros & Cons

Cons:

· The Air Supply intake must be located in an uncontaminated area. This requires a hose running from a blower unit and the air supply should be heated air in the winter.

· The hose is cumbersome if you’re not stationary and could easily (and will) become entangled with anything you’re moving around.

· Would definitely not use around machinery with moving parts that could come in contact with the hose.

· The blower is noisy

· Expensive—but far less than a pair of lungs if you’re exposed to contaminates frequently

Pros:

· Air as fresh as you can supply

· Moving air supply eliminates eyeglass fogging and moisture dripping from mask onto fresh paint or work piece

· No dust or paint boogers

· If you’re wearing the hood, the airflow keeps your head cool

They say, “What happens in Vegas; stays in Vegas.” Unfortunately, a lot of the harmful stuff you breathe stays in your lungs. The most harmful particulates are the ones too small to see. They infiltrate the deepest.