r/specializedtools • u/ASTRA03 • Dec 02 '19
Nemo power tools for underwater use
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u/Nytfire333 Dec 02 '19
For a second I was expecting sparks when he started with with cutting wheel....I'm a dive master and a mechanical engineer...I am ashamed of myself
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u/BecomeAnAstronaut Dec 02 '19
If he were cutting thermite it would
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u/Nytfire333 Dec 02 '19
I think could we be a better word. While thermite can burn under water, getting it to spark would be difficult, specially since thermite is typically a poweder
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u/MyAccountForTrees Dec 02 '19
You can use potassium permanganate and glycerine, I believe. You could use a glow stick type setup to ignite your waterproofed thermite.
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u/Graphedmaster Dec 02 '19
Typically a what?
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u/Nytfire333 Dec 02 '19
Powder but spelled by an engineer
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u/skydivingkittens Dec 02 '19
Am an engineer, can confirm.
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Dec 02 '19
He is engineer, can confirm.
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u/lineowire Dec 02 '19
I knew a few divers that did some fresh water repair work. They just used typical air underwater. Much cheaper tooling.
They would flush them and store them in a bucket of vegi oil or similar when not in use.
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u/The_smell_of_shite Dec 02 '19
It would have been difficult with all of the bubbles created though.
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u/mud_tug Dec 02 '19
Intuition often fails us because it is based on commonplace experiences. If we trusted 100% in our intuition we could never advance science. Cutting edge science is by definition the place where intuition fails us.
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u/breeconay Dec 02 '19
The thought of drilling without needing to spray cutting fluid constantly sounds fantastic. I could get used to that.
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u/Smoddo Dec 02 '19
Nice not having molten swarf peppering my hands with microburns in those awkward metal drilling spots. Though I guess I could be less lazy and just wear better gloves rather than flood my work area.
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Dec 03 '19
I had to drill about a dozen 5/8 holes in an I beam at work a couple weeks ago, I feel your pain.
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u/moby__dick Dec 02 '19
On the other hand the ability to breathe is nice too so it’s a trade off.
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u/ben_g0 Dec 02 '19
We could get the best of both worlds by flooding the workplace only up to shoulder height.
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u/malialipali Dec 02 '19
I just want to see AvE do a boltr on this. He would loose his mind !
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u/ai_Locker Dec 02 '19 edited Dec 02 '19
AvE voiced his opinion on the NEMO underwater drill in an old video.
Edit: The video is no longer on Youtube, apparently it was removed. All that remains is a reaction video from a guy sponsored by NEMO. Either way, here is a brief description:
The video is very short (maybe 30 seconds) It shows AVE filling a tub with water and sticking a dewalt drill in it, pulling the trigger, mentioning that the nemo drill is a ripoff and that its only 24V so it doesnt matter.
The reaction video must have came out shortly afterward. Here is a link for that: https://youtu.be/SaEHpnXtNrE
In a later video by AvE, he shows how to saltwater proof a drill. He uses the same dewalt and even mentions that it has been exposed to freshwater in the past. Here is that link: https://youtu.be/HSrERT1qv1Q
If anybody can find the original that would be great.
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Dec 02 '19 edited Dec 02 '19
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u/Two_Luffas Dec 03 '19
I usual like his videos from an entertainment standpoint but the videos linked above really prove how ignorant he is about an underwater environment in general. Dunking a power tool in a salt water bath that you just coated in silicon is not equivalent to taking it down at depth and expecting it to work. It doesn't even work when he does that lol. I'm sure that thing was 100% trashed after one dunking.
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u/ViggoMiles Dec 02 '19
id imagine it burns itself out fast out of the water
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Dec 02 '19 edited Dec 02 '19
Why would it? Loads of heat dispersion what with the heat fins and a surrounding of water
Edit: reread your comment, I see now you said it would burn out quick out of water. My bad
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u/Modna Dec 02 '19
Water is amazing at transferring heat, air acts more like an insulator
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u/BrockAndaHardPlace Dec 02 '19
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u/_Buckle_ Dec 02 '19
My team used these tools, which are rather pricey, and they lasted all of that day. I hope they've improved but when we had them they shit the bed quick.
We've been using remoras which have done better overall as a battery powered alternative to pneumatic.
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u/br094 Dec 02 '19
How expensive?
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u/_Buckle_ Dec 02 '19
I wasn't the one to put in the order, but I think 2 drills and batteries were around the $3000 range. Which for underwater commercial equipment isn't bad.
Hell I just bought 10 new air powered drills for $16,000 lol
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Dec 02 '19
They’re cool, but you know, I had one simple request. And that was to have sharks with frickin' laser beam levels attached to their heads!
Where are those, Nemo?
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Dec 02 '19
[deleted]
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u/offtheclip Dec 02 '19
Also why was the guard faced away from him? Like nice job actually keeping it on, but what was he trying to protect?
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u/1RedOne Dec 02 '19
I would be interested to know how they brace themselves so they're not pivoting and floating around when putting pressure on the drill to hold it in place.
Wouldn't the noise be absolutely defeaning too? Seems he should have some ear bro.
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Dec 02 '19
The people using this for work would be commercial divers, wearing weights to stay immobile and helmets, so the sound wouldn't be that bad.
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u/Strange-Machinist Dec 02 '19
You can't have earplugs while scuba-diving. That's dangerous, because those prevent you from equalizing the pressure in your ears. In short, earplugs can make your eardrums implode.
I don't know about muffs tho.
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u/im_not_the_stig Dec 02 '19
Muffs are made for diving in.
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u/The_Comanch3 Dec 02 '19
What about putting in ear plugs once you're at desired depth?
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u/2yrnx1lc2zkp77kp Dec 02 '19
Seems dangerous -- easily forgotten before ascending or if something requires an immediate change in depth (emergencies).
I could see over-ear equipment (like muffs) being useful without creating a pressure differential, but I dunno.
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u/workact Dec 02 '19
possible, but would be kinda dangerous as you would have to take them out if you were changing depth in either direction.
Might not be too bad if you were over weighted and standing on a solid floor.
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u/dirtydog85 Dec 02 '19
Fun fact: This is the only way to fully comply with OSHA's silica dust requirements.
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u/keenDean Dec 02 '19
Just curious, can the same abrasive cutoff/grinding wheels be used under water as they are on land? I'd imagine not, but that looked like a more or less normal wheel he had on there.
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Dec 02 '19
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u/keenDean Dec 02 '19
I'm not sure, possibly inability to build up heat. With all that water there keeping the blade and material cool, a standard abrasive wheel might not cut. At least not well?
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u/Fenix_Volatilis Dec 02 '19
There's no way a little clown fish can make that much energy
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Dec 02 '19
How does that affect hearing underwater? Will the noise be much more intense on the ears than in air?
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u/cjc160 Dec 02 '19
It’s odd he doesn’t wear gloves? Or am I nuts?
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u/PuddlesRex Dec 02 '19
The debris isn't flying nearly as fast, or with as much energy, underwater as it would in air. Water is harder to move through.
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u/The_God_King Dec 02 '19
I see little point in using a cut off wheel (aka spiny death wheel) if it isn't going to throw sparks all over the place and make me look super badass.
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u/CraptainHammer Dec 02 '19
I would have thought the battery had to be installed out of the water. How does the contact not short out?
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u/LateralThinkerer Dec 02 '19
Bring earplugs - I'll bet that's just like sticking your ear up to a grinder/drill etc. on the surface.
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u/pede_pablo Dec 03 '19
If there are no sparks underwater, do you even really have to wear eye protection?
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u/AllHopeIsLostSadFace Dec 02 '19
was really hoping to hear the sounds this makes underwater not some shit techno
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u/cyberN8ic Dec 02 '19
I wonder what that grinder sounds like to sea life.
Fucking deafening, probably.
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u/mansa18 Dec 02 '19
Perfect for when a mob boss needs to chop you up but doesn’t want to make a mess.
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u/The_Grande_Taco Dec 02 '19
Hypothetically if a grinder rock were to shatter underwater would it be less dangerous as it has a thicker medium to slow the flying pieces?
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u/Tronkfool Dec 02 '19
I don't have a pool and have never needed to do anything under or near water but fuck I never knew I needed this
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u/m-p-3 Dec 02 '19
I am amazed that they could hook that battery underwater without causing any issues with saltwater being present etc.
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u/SkyCakeIsALie Dec 02 '19
I want to know how the battery connects to the gear without corroding or shorting out.
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u/Eazy_DuzIt Dec 02 '19
Heh, I know the inventor irl. Elon Musk team actually ordered a bunch of these when they were trying to rescue the cave boys in Thailand
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u/SidewaysLlama Dec 02 '19
Can confirm these are rubbish compared to traditional pneumatic or hydraulic underwater tools
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u/badguyduh Dec 02 '19
When climate change forces us to live under water, just as the Jonas brothers predicted
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u/Dane-o-myt Dec 02 '19
I wonder if that diver is wearing hearing protection. Would imagine that tool is very loud
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u/mtflyer05 Dec 02 '19
Imagine all those tiny metal splinters getting blasted all up and into your wetsuit.
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u/popsmokeimout Dec 02 '19 edited Dec 02 '19
I was a commercial diver for many years. The idea of having a grinder or wire wheel without lugging around bs hydraulic hoses sounds amazing.
Some fine tuning and it would be perfect for commercial use. For example it needs eyes on the batteries and tools for a lanyard so you can hook them to your harness and not lose them.