Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact Wrench v2-500ft/lb
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Availability:
In Stock.
Arrives
Saturday, Aug 22
Size: 1/2"
Style: Wrench
Features
- This next generation v2 features a new high performance motor and ported exhaust for 500 ft-lbs of Max Torque
- Industry leading extreme short profile with a full length of less than 3-7/8"
- 3 forward and 3 reverse settings
- Innovative twin hammer design. 4.8 CFM. Hi-Flo fittings suggested.
- Weight 3.0lbs
Description
The Astro Pneumatic Tool 1822 1/2" Nano Impact is the latest in mini lightweight impact development. At only 3.85" long (or about 1/2" longer than a credit card), the twin hammer 1822 Nano Impact is deceivingly powerful, registering a max of 450 ft./lbs. of torque. The 1822 was designed to be extremely light (3.0lbs.) and well balanced when connected to an air line, and operates in 3 forward and reverse speeds. Featuring a twin hammer design for increased reliability, and coming from Astro's robust ONYX line, this impact has more than just the numbers behind it.
Color: Standard
Brand: AP Astro Pneumatic Tool Company
Material: Metal
Item Length: 7.5 inches
Item Weight: 3 pounds
Head Style: Round
Item Torque: 500 ft-lb
Operation Mode: Pneumatic
Voltage: 0.01 volts
Measurement Standard: SAE
Material Type: Metal
Finish Types: Painted, Polished
Color: Standard
Item Length: 7.5 inches
Item Weight: 3 pounds
Package Quantity: 1
Jaw Capacity: 0.5 inches
Brand Name: AP Astro Pneumatic Tool Company
Model Number: 1822
Unit Count: 1 Count
Number of Packs: 1
Set Name: ONYX
Number of Items: 1
Manufacturer: Astro Pneumatic Tool Company
UPC: 787721621492 745227021314 767654973905 784497139435 787721621584
Global Trade Identification Number: 14
Included Components: ONYX 1/2" Nano Impact Wrench - 450ft/lb
Item Type Name: Pneumatic Tools
Manufacturer Part Number: 1822
Manufacturer Warranty Description: Manufacturer’s Warranty
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Aug 22
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: 3/8"
Style: Wrench
The Astro Pneumatic Tool 1828 Onyx 3/8" Nano Impact Wrench absolutely exceeded my expectations. For such a compact tool, it delivers impressive power. It fits easily into tight engine bays and small spaces where a larger impact just won’t fit, which makes it perfect for automotive work and quick repairs. The build quality feels solid and durable, and it has a comfortable grip that makes it easy to control. Despite its small size, it has more than enough torque for removing bolts and fasteners without struggling. It also runs smoothly without excessive vibration. If you’re looking for a lightweight, compact impact wrench that still packs a punch, this one is a great addition to any tool collection. Definitely a solid buy for both DIYers and professionals. Definitely the best value for your money!
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Reviewed in the United States on February 25, 2026 by Melissa Martin
Size: 3/8"
Style: Wrench
Very compact and powerful for its size! Works well in engine bays to sneak into places a normal impact won't fit.
Reviewed in the United States on April 17, 2026 by Amazon Customer
Size: 3/8"
Style: Wrench
I've stopped using an air ratchet completely, and this replaces many of my regular ratchet jobs (for loosening, mostly). This thing is amazingly small, and I think probably makes as much or slightly more power than advertised - when properly oiled. I thought Astro Pneumatic was one of those cheap-o generic names, but no way; this is *awesome*, especially for the price. And it's amazingly small. I bought it specifically to use with some bolt extractors on a rusty exhaust manifold in a tight space, but I've found that the light weight and small size makes it useful for lots of things. I picked up some impact wobble extensions from Harbor Freight (even HF can't screw up an extension) as well as several sets of the Astro low-profile sockets and the Gear Wrench x-drive pinless universal joint, and this thing is getting used everywhere. I specifically like the lever-style torque settings on the back; they make a real difference, unlike some impact guns where they should have one useful setting and several labeled as useless. I run on lug nuts with the thing set on 2 (out of 3) to keep the speed down a bit, and after just a couple of hammers, they end up just snug enough (60-ish ft-lbs) that I can set the car down and use a torque wrench the rest of the way. The light weight is great; I have a magnesium Snap-On 1/2" drive impact, and while it'll either remove or break off anything I'm gonna encounter on regular automobiles, it does get a bit heavy when you're upside-down twisted around a driveshaft with dirt falling in your face. This thing, in combination with a Flexilla high-flow swivel coupler (you *need* high-flow fittings for an impact gun, and that swivel is easily the best-flowing one anyone makes) can get into a tight space and not make you feel like your arm is going to fall off. I replaced an alternator bracket oil gasket on my BMW N62 recently (which is about a 12 hour job), and used this for pretty much the whole job. It saved a ton of time and effort compared to trying to use ratchets, snaked around all the stuff jam-packed into an E60 engine compartment. As some others have mentioned, it's a tad loud, I guess, but the big Snap-On is far louder. Really, I consider this gun average for an impact gun. The noise is not as annoying as my air ratchet, which, as mentioned, I no longer use. It's also really well made. The picture makes it look like maybe plastic, but it's a textured finish on a metal case. The trigger feels good, the balance is good, the "shiny part" looks sort of like nickel or black chrome and is well machined, and overall you can tell that it's well-made by people who give a damn about their product. I've banged it around a little in the weeks I've been using it, and while there are a couple of little scratches, it's held up well. I've also sold a few friends on this thing, because I can't stop talking about how much I like it. :D I would've been happy if I'd paid $250 for the thing; the fact that it typically has a 2-digit price is just amazing to me. Buy one. You won't be sorry.
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Reviewed in the United States on April 11, 2019 by D. Sauer
Size: 1/2"
Style: Wrench
This is a great and strong impact. I do oil it every couple of days. I use it mostly in spaces that are tight, but also use it just because it is what's on my tool cart at the moment. Gets used mostly for brake jobs, but has no problems with most C/V axle nuts or using an on vehicle hub bearing press. This is the second one I've bought. The first one still works after years of use, but has become weaker due to heavy use. NOT unexpected for automotive tools that get used sometimes not how they are meant to be used and abused. Just buy it. Keep it oiled, and expect to love it.
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Reviewed in the United States on April 24, 2026 by kevin
Size: 3/8"
Style: Wrench
Very loud, but works great, very compact and comfortable in the hand. Seems to be very good quality!
Reviewed in the United States on July 31, 2026 by Erin B Varnedoe
Size: 1/2"
Style: Wrench
Writing this review after changing 3 wheel bearings, 2 ball joints, and 2 struts in a single day. I think the other reviews that mention lack of power are probably not supplying this tool with enough air, or using an improper setting. Based on tool usage, I had to set my regulator at 110 PSI to keep 90 PSI at the tool during use. This measurement was using 50 feet of 3/8" air line with 1/4" Hi-Flow fittings. I believe this tool is sensitive to a lack of air. This tool was able to remove axle nuts that were torqued to 150 ft/lb, rusted ball joint nuts, and wheel bearing bolts easily. Lug nuts were no problem for this. This hits much faster than my 1894 Thor impact. The Thor might hit harder, but this hits more often. This was able to remove bolts that Thor wouldn't, but Thor was able to remove bolts this would not. The selector level on the back of the tool really can decrease the power a lot, useful for not breaking bolts. During the repairs yesterday I handed my neighbor this tool while doing the repairs, he actually snapped a wheel lug stud while tightening with this tool on max power forward setting, resulting in one more part replaced on the job. So really no concerns over lack of power. This fit into places that my other impact wrenches simply will not (IR 2135, HF Earthquake, Thor, and an old Coleman Gun) and seems to have plenty of power for most jobs. Just keep in mind this hits and spins much faster than most full size. I cannot comment on reliability as I have only used this gun for about 8 hours, but I did put it through hell over those 8 hours.
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Reviewed in the United States on August 2, 2021 by Timothy H.
Size: 3/8"
Style: Wrench
Very good. Powerful, small, seems well made. I don’t know about 450 ft-lb, but rating an impact tool that way isn’t so great. It is, unfortunately, all we have to compare with, though. Elsewhere in these reviews is a complaint about its performance on loosening head bolts. I believe the review, but take a look at torque limiting extensions.. they are long, and torsionally springy, just like head bolts. When you apply an impact to something that deflects, the impact is lessened. Remember elon musk throwing the ball bearing at the cybertruck window? Oops, neither the window nor the bearing deflected much. The force exceeded what the window could withstand. If he had thrown it at the softer tire, the deceleration and force would be less, nothing would have broken. Same as throwing it at a pillow, but that doesn’t mean the pillow is stronger than the window, or that it wasn’t thrown hard. Same with the head bolt, the longish bolt would twist, only right at the moment the rotating hammer applies the torque, where a short rigid lug nut would come off. Try using any impact wrench with a long extension, it just doesn’t work as well. I notice sometimes that even a deep socket lessens applied torque vs a shallow one. Anyway, I really like this little gun, and was surprised by its power, whatever number is assigned to it. The reversing/power lever and trigger have a nice feel, also. I do think that when the applied torque varies a lot depending on the rigidity of the fastener, socket, and extension (if any), rating the power in ft-lbs is a poor way to do it. Thats what everyone does, though, so hopefully it gives some info for comparison. Maybe energy per blow when stalled?...I Don’t know.... probably true that this won’t loosen something torqued to 450 ft-lb. I’m tempted to call it a lie, but astro is just conforming to a not so appropriate unit. It is quite powerful for a little 3/8 drive gun. (Ft-lb torque and ft-lb energy are not the same, despite the unfortunate apparent sharing of units...one involves motion, the other is using the ‘ft’ only to describe lever dimensions.)
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Reviewed in the United States on May 12, 2021 by john w.
Size: 1/2"
Style: Wrench
I'm a shade-tree mechanic and last year my car's transmission or torque converter (don't know which) pooped out on me and I made the decision to get another car. I buy used cars I can write a check for and found a 2012 Terrain that looked like it had been cared for well and had an inch of maintenance receipts to boot. So I felt pretty confident and bought it. I'll try to keep this short, but 10k miles before I got the car it had been in a shop for a $1400 timing chain replacement. The shop ripped the previous owner off on that job big time. I know this for a fact and knew a new timing chain kit needed to be installed. Since I work from home and have a fair amount of tools I decided to step up my shade-tree game and tackle this timing chain issue and get it done right. Then I ran face first into a brick wall that goes by the name "tensioner". This tensioner is on the back of the cylinder head and takes a 32mm socket/wrench. Now I'm a big guy but this thing was practically welded on. It was looking like I may have had to remove the head over this tensioner because my impact gun was nowhere near small enough to get between the motor and firewall. You can see where this is going. This tool was small enough to get back there and powerful enough to zip the tensioner off like it was nothing. I bought this because I needed it, but if you think there's even a slight possibility you could use this tool DO IT!! This much power, in this small of a package, for this little money is a no-brainer imo.
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Reviewed in the United States on January 19, 2021 by cswann1