No, I think it's because the ones that say that ****. It's like saying you have to wear safety contact lenses under safety glasses, for liability.Pretty sure they all say that for liability.
Welding helmets say it too. The Uvex one looks to cover the sides, but pics show safety glasses underneath.
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Seems like semantics, if you're facing what's being worked on, a face shield should protect the entire face (including the eyes) if it's rated for that type of protection. Maybe if it were a chainsaw and you had stuff flying upward and under the shield, something could bounce into your eyes (or even then you'd more likely be tilting the shield down while looking to protect that area), but other than looking away from the work and leaving the shield open to flying particles I don't see it happening (unless the shield is too flimsy to begin with; a sticker on one said it didn't provide extra ordinary protection from flying particles and safety glasses were necessary, but I'm thinking a better shield is necessary if you want to protect the rest of your face at all).Safety glasses protect your eyes, while face shields protect your face.
Interesting. Looks like Honeywell and Sellstrom make those. Sellstrom mentions high impact standards, and Honeywell mentions heat resistance.This one you could probably get by without safety glasses, but it'd be hot as hell.
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Wamsutta, you may want to consider a mesh shield...
https://www.amazon.com/Pyramex-S1060-Shield-Steel-Visor/dp/B00YA27E6C/ref=sr_1_4?s=hi&ie=UTF8&qid=1471927488&sr=1-4&keywords=chainsaw+face+shield
Wamsutta, you may want to consider a mesh shield...
https://www.amazon.com/Pyramex-S1060-Shield-Steel-Visor/dp/B00YA27E6C/ref=sr_1_4?s=hi&ie=UTF8&qid=1471927488&sr=1-4&keywords=chainsaw+face+shield
Thank you, that's exactly what I need.
Looks like the "demining" or fragmentation visors are a good mixture
over a helmet as well).
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Doesn't look like they require safety glasses underneath
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Thanks. I was also reading about some tests set up to compare demining visors. Perhaps what's most pertinent to the discussion of material thickness is the following result: "By performing tests with visors that range in thickness, it has been demonstrated that even a small increase in visor thickness can tremendously affect the ability of a visor to prevent high velocity fragmentation from reaching the face of a deminer. In the tests performed for this study, it was demonstrated that by increasing visor thickness from 5 to 5.7mm, one could decrease the chance of a fragment penetration by over eight times."Also, pay attention to safety ratings and make sure they are sufficient for the work you're doing. Using a grinder where there's a risk of blade explosion you want something military rated, not just ANSI.
Here's some reading: http://blog.safetyglassesusa.com/how-to-identify-ballistic-rated-eyewear/
Everything in here is military rated: http://www.peosoldier.army.mil/equipment/eyewear/
in the back of my mind I expected them to be as substantial as they look, guess not.
Actually, I think this Peltor would be better for the weedwacker because it also has ear muffs to protect the ears.
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http://www.hillas.com/Categories/3M-Safety-Products-Head-and-Face-Protection/3M-Peltor-Brush-Defender-Visor-System-Face-Protection-V40AH31A-1P-with-H31A-Ear-Muff-1-ea-cs.html?gclid=CIq-xODK2M4CFUEmhgodzaAFDQ
Not sure (those sit pretty far off), depends on how the face shield fits and what I'm working with, but there are all kinds of horrible power tool vs face accidents pictured out there (that safety glasses do not prevent), along with one at the throat (in which some kind of protection was worn, and obviously wasn't adequate).If you're going to this extent to protect your face, are you also wearing throat protection like the mil spec pics above?
^^ I have used several brands of these for logging (with the helmets attached, though). You would be surprised at how much you can bend them if you push your finger (or a tree branch) into one (some brands more than others). Some I've tried are less like wearing wire mesh armor and more like wearing a window screen in front of your face. In other words, I'd stick with safety goggles under this type, too.
However, I also want full face protection with no safety goggles quite frequently when grinding and doing other stuff where I worry that, if I wear safety goggles with no face protection, I might emerge a lot uglier with my vision perfectly intact to notice. In these cases, I wear this 3M 6000 series full face cartridge respirator, which is actually really comfortable:
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I feel a LOT more protected in this than I do in the logging wire-mesh type. You can try punching your face while wearing it -- you'll feel very safe from yourself. Not sure how it does against bullets -- haven't tried.
I don't mind breathing through the filters although it gets tiresome sometimes, but you can just us it without filters. If I can stand the extra heat here working outside in SoCal, you'll be fine. I also have a fill PAPR powered respirator, which is a lot cooler to work in due to the airflow, but I only take that out for the nasty stuff since it's a pain to connect the parts and lug it around.
Thanks. I was also reading about some tests set up to compare demining visors. Perhaps what's most pertinent to the discussion of material thickness is the following result: "By performing tests with visors that range in thickness, it has been demonstrated that even a small increase in visor thickness can tremendously affect the ability of a visor to prevent high velocity fragmentation from reaching the face of a deminer. In the tests performed for this study, it was demonstrated that by increasing visor thickness from 5 to 5.7mm, one could decrease the chance of a fragment penetration by over eight times."
Industrial face shields are just one or two millimeters thick (and don't claim to stop power tool fragmentation). There doesn't seem to be anything in between that and mil spec (5+ mm for those). I'm kind of surprised not to have found a single heavy duty industrial face shield out there, after reading the sticker on one basically saying it wasn't going to work, and it implied that none of them do...in the back of my mind I expected them to be as substantial as they look, guess not.
Maybe those who come up with industrial standards figure the sum total of a tool guard + minmal face shield + minimal safety glasses would equal a thicker visor, but I gather from tests like the V50, and equipment comparisons based on it, that a single guard of appropriate thickness around the face is going to be much more effective. Also, the demining tests concluded that working as far away as possible from the point of origin of high velocity fragmentation would help, and since people are generally working closer to power tools, I don't suppose a quarter inch is much thicker than necessary for 100% effectiveness at stopping lower velocity fragments (or at least you may not have to replace it every time that happened, as scratches can be removed from this material). The standards for mine clearance operations say the fragmentation visor has a V50 rating of 1476 fps, and ideally should be used at a demolition safety distance upwards of 300 meters (furthermore, they do comprise face and eye protection all in one).
Going back and comparing data between other shields, the industrial tests referred to by Zekler use a steel ball fired at 623 feet per second to rate face shields for high energy impact, while the quarter inch riot visors are rated at 50% protection from bullets fired at 850 feet per second, and you have to figure that a fragmented tool can be sharper than a steel ball too (so I don't think the industrial tests are as realistic, even if they do rate comparitively high impact resistance with thinner material), especially if you're going for 100% protection from lower fps fragments at close range (all of the tests are ballistic in nature, whether or not the face shields are rated this way). So then, what are industrial shields rated for? Ball bearings breaking loose, like missing socks flying out of the clothes dryer...![]()
Didn't find specs on that shield at a glance, but got the Paulson DK5-X.250AF face shield in the mail (it's unmistakably thick, yet doesn't feel too heavy). They have a video describing its fitment and all (designed for PASGT helmets in particular which feature a front brim, I suppose it would fit a hard hat with a projecting rim fairly well, other than sealing it maybe). Come to find it was superseded by the DK6 which includes a brim shaped bracket for a more universal fit to helmets (I'll probably try both since that's on sale for $5 more). Looking at their other video for this new one, I think the NOS DK5 might actually fit an inch lower off the front (or the demonstrator didn't push the DK6 down all the way), and each is designed to clear a gas mask or respirator underneath. Not as likely to fog up at that angle I guess, well the AF versions are also anti-fog somehow (I think that's inherent in polycarbonate anyway, as it is said to absorb a certain amount of moisture, unless the treatment prevents this and I'm thinking of it backwards). Then there's the DK7, which has a lower profile vertical angle, with a flat bracket (yet it's a two inch shorter visor, and they have shorter versions of the others also, for use with larger than average respiration devices).I wear this 3M 6000 series full face cartridge respirator, which is actually really comfortable:
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. I don't know about you, but there's nothing silly about wearing glasses under a shield. My eyes mean a lot to me and my career.
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You got me there, the 1/4" shield is only 50 times safer (I'll estimate, based on the test showing an eight fold improvement for each .7mm increase in thickness).THIS X100.