DEWALT 20V MAX 1/4 Inch Hydraulic Impact Driver,Quiet, Brushless Cordless XR Extreme Runtime, LED Halo Ring, Tool Only (DCF870B)

Love it. I'm finally migrating from my first generation 20v brushed motor DeWalt impact. I expected it to be less powerful, and somewhat less intuitive. I was totally wrong. The torque multiplication is fantastic, just as good if not BETTER than my old unit (I can't say how it is relatively with the other brushless units, but it's probably a little bit lower performance. Three phase brushless systems are superior in every way you can slice it). It's very quiet, I mean probably less than half the decibels of my original. I set some of the iron works bolts that support my first floor to test; the tool itself makes so little noise it's amazing. The only thing that stood out, noise wise, was the actual impact cycles resonating with the steel beams. My 5 year old was sleeping directly above, and he didn't wake up for any of the eight large fasteners. The speed setting is awesome, but it's not just speed, the torque output is higher on speed two for sure, and I do not mean it makes more impact cycles per second (though it does), the actual torque is significantly higher. The speed setting should not be used as a drive restrictor, even though it probably could be with some practice (ballpark, thumb at arms length with one eye closed type of accuracy). I don't think the few mentions of non intuitive feel are fair or even accurate. Fire off one high friction screw into two pieces of pine, and consider your meatware calibrated. It weighs a lot.... A good deal more than my first gen unit. I'll put it this way, I put one of my 60v flex batteries on, and it was almost balanced just right. Price point is.... Eh. Could be better, but honestly, you get what you pay for. Hydraulic cavitation feels very nice, almost unnatural, but very very satisfying. Overall power is in range of expectations for the class for sure. I'm keeping my first gen for dum dum work, this unit is going to my workshop floor to use with electronics and other sensitive equipment. I frequently use a step down converter to use 5/32 bits with specialty types (no, I don't crank anything down with this, but I sure do break old fasteners free at full force!). The 20m work light is brilliant. Not that I don't already have an entire Division of purpose built lighting... This is just convenient when I don't want to drag another tool out for something quick or unforeseen. Battery consumption is very efficient due to the the phase solid state driven motors. I build these systems at the component level, I know them very well, you can't beat the efficiency and the power at such precision. This is a tank just like most of my DeWalt tools. I seriously doubt I'll be able to break it. You'd have to be a real a***hole to break one of these. I expect it to last indefinitely. I'm not 100% on how the hydraulic housing is configured, and if it will leak in 15 years or something, but I expect it was designed appropriately. Recommended, 10/10 ....and as a very picky engineer, I don't give anything full marks.

This is without a doubt the best impact driver I’ve ever experienced. It arrived right on time (Amazon prime shipping) and I took it to work with me today to put it to use. At first I wasn’t sure if it was even working. All I could feel was a little ticking in my drilling hand and barely any sound from the tool. Then I saw the 2 1/2” screw just gliding right into the cabinet face frames I was connecting. I used it exclusively on the high speed setting and the variable speed trigger was flawless. In situations where didn’t want to suck the screws up too tightly and needed finesse, I found that I could barely squeeze the trigger and get the most powerfully gentle tapping effect that allowed me to micro manage the tightness I wanted. I say powerfully gentle because this thing will keep on tapping until it pulls the screw through the material or snaps off the head. The tool is very compact and I could easily screw the faceframes of 9” cabinets and the action is extremely smooth. I had very little if any instance of my square drives jumping out of the screw heads. Drove all of my screws today on an aged 5ah dewalt 20v and didn’t drop a bar on the level indicator. It is quieter than my other non impact drivers and if you’re skilled, it will definitely ZIP your screws in at full throttle. I love dewalt tools and this one impressed me very much. Worth every penny and I’ll never go back to any other impact vs this hydraulic dewalt. It is truly a great tool. Super happy with it.

Quiet and powerful. For those that are Delwalt users, this is driver to get. To be fair, here at the end of 2025, the DCF860 is still the king of the driver's, but the DCF870 gets it done. I will take a little less power for the much lower volume when drivinf fasteners. I ran 2-1/2" #9 deck screws in and had to watch that i wasn't overdriving them. I stepped up to the 5-1/8" and its dropped them like a rock. The grip is comfortable as most Dewalts are today. No Hotspots with barehands. It feels solid but I haven't dropped it out of 2nd story window. The compact head will be great for working between studs. But the headline is how quiet it is. With predrilled holes i didnt even hear impacting until I got to the bigger fasteners. Granted this was all white pine. But when driving the aforementioned 5" mini lags, it was quieter than my 12V driving 2" #8's. When i put up plywood sheeting in my garage, everyone for half a block knew it using my old 887. If I'd have had the 870, no one would've had a clue. Its unquestionably by favorite impact these days. Now Dewalt how bout a fluid impact in a lower power form factor for furniture, trim work, and the like.

Compact, quiet, and well made.

My coworker used his regular dewalt impact next to me the other day and holy cow that thing is loud. I’ve forgotten how loud my old one was. We service/install automatic and manual pedestrian doors. We are in all types of medical facilities about 75% the time and the patients and staff don’t want to be hearing that kinda noise. This dewalt hydraulic impact is SO MUCH more quiet and more powerful. No issues so far. I’ve had it now for about 6 months and use it at least 5 days a week the whole time at work.

I have five other older dewalt impact drivers that I need to wear hearing protection when I use them. This one is far more powerful and super quiet in comparison. The best driver I have ever owned. A must have. I purchased a second one as soon as I used this driver for the first time. On the high power setting (2) you have to be careful or you will shear the head off the screw if you hold the power too long. Super happy with the upgraded unit. The older drives are going out to the street in front of my "Free" sign.

Muy buen producto hasta el momento el modelo más reciente y con excelente diseño, su funcionalidad en lo que respecta muy bien, solo me falta la batería de mayor capacidad

As an HVAC technician, I recently upgraded from the DCF887 to the new DCF870, and I couldn’t be happier. This impact driver is much quieter, and the hydraulic mechanism greatly reduces vibration, making it easy on the wrist even during long installation jobs. One thing I immediately noticed is that the wobbling issue I had with the 887 model is almost completely gone. The bit feels solid and stable, which gives me more control and accuracy. The compact head design is another huge advantage—it fits perfectly into tight spaces where standard impact drivers just can’t go. Overall, it’s a powerful yet smooth tool that’s ideal for HVAC or any trade work that requires precision in confined areas. Highly recommended.

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Es muy veloz para ser hidráulico y el gatillo tiene muy buena sensibilidad. Si gustas un hidráulico sutil para tareas donde requieras controlar la potencia te recomiendo el milwaukee surge de 12v. Si lo que buscas es velocidad esta es la opción. Una vez que usas los atornilladores hidráulicos te enamoras de ellos.