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The DeWalt DCF870B is a 20V MAX XR brushless impact driver that uses a hydraulic drive instead of a standard impacting mechanism. DeWalt rates it up to 57% quieter during impacting and up to 40% faster driving than its regular cordless impact drivers, with 500 in-lb of torque, 3,000 RPM and 4,200 ipm. At 4 inches long and 2.2 lb bare, it fits cabinet and mechanical-room work where bigger drivers struggle. It suits tradespeople already on the 20V MAX platform who work in occupied buildings and want smoother, quieter fastening; the trade-off is lower peak torque than DeWalt's high-torque impact drivers and no battery in the box.
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Lowest price we've seen: $172.97 on Nov 11 at Amazon. Tracked across 15 stores since Nov 11.
Owners rate it highly, with 4.8 out of 5 from 31 ratings. The quiet hydraulic drive and smooth control draw the most praise; the main reservations are the lower torque ceiling and the bare-tool packaging.
Key Features
Quieter Driving
The hydraulic mechanism cuts noise by up to 57% compared to standard DEWALT cordless impact drivers while still giving you impact-driver speed. That matters when you are working in occupied buildings, finished spaces, or anywhere noise complaints slow the job down.
Fast Screw Driving
This DEWALT hydraulic impact driver is built to keep pace on larger fasteners, with up to 40% faster driving and a top speed of 3,000 RPM. You get the smoother feel of hydraulic driving without giving up productivity.
Tight-Space Ready
A compact 4 in. length, ergonomic body, 1/4 in. quick-connect hex chuck, and 9-LED work light make it easier to work inside cabinets, mechanical rooms, and framing corners where bigger tools get clumsy.
Overview The DEWALT DCF870B 20V MAX XR 1/4 in. Quiet Hydraulic Impact Driver is a cordless hydraulic impact driver built for fastening where noise, access, and control all matter. This is a hydraulic impact driver designed for driving screws, lags, and common fasteners in framing, cabinetry, metal fastening, and general jobsite work. Model Number: DCF870B. As a bare tool, it is aimed at users already on the DEWALT 20V MAX platform who want a compact impact driver that hits hard but sounds noticeably less harsh than a standard impacting mechanism. The headline feature here is the hydraulic drive system. DEWALT rates it as up to 57% quieter during impacting, which is a real advantage for work in schools, offices, hospitals, apartment turnovers, punch-list jobs, and any occupied space where a regular impact driver can be too loud. Quiet usually comes with a tradeoff, but this tool is also built to drive fast, with up to 3,000 RPM, up to 4,200 impacts per minute, and published claims of up to 40% faster driving in demanding applications. In plain terms, it is meant to give you the smoother feel and reduced noise of a hydraulic impact driver without turning into a slow specialty tool. Size is another big reason this tool makes sense. At roughly 4 in. long and 2.2 lbs as a bare tool, the DCF870B is clearly set up for tight access. That short head length helps when you are running screws between studs, inside cabinet boxes, around ductwork, or close to electrical panels and hardware. The 1/4 in. quick-connect hex chuck keeps bit swaps simple, and the forward/reverse rocker switch plus variable speed trigger make it easier to stay controlled when you are starting screws in finished material or delicate hardware. DEWALT also built in practical jobsite features instead of treating this like a stripped-down compact driver. The brushless motor is there for efficiency and long-term durability. The 2-speed mode select gives you a way to match output to the job, which is useful when you need one mode for controlled fastening and another for pushing larger screws faster. The integrated 9-LED work light is more than an afterthought too, with a 20-minute work light mode that helps when you are working in utility rooms, under cabinets, in attic spaces, or late in the day when shadows hide the fastener head. From a real-world use standpoint, this tool is a strong fit for contractors who work around people. Finish carpenters, cabinet installers, maintenance crews, remodelers, commercial punch-out teams, electricians, and HVAC installers all run into jobs where a full-size, sharp-sounding impact driver is more annoying than helpful. The quieter operation can make the work more comfortable for you and less disruptive for everybody nearby. It also helps if you spend long stretches driving fasteners overhead or in repetitive work, where the smoother hydraulic feel tends to be less fatiguing than a more abrupt hammering action. The DEWALT DCF870B 20V MAX XR 1/4 in. Quiet Hydraulic Impact Driver runs on the DEWALT 20V MAX battery system and is sold here as a bare tool, so battery and charger are not included. If you are already invested in DEWALT cordless tools, that makes this an easy add to the lineup instead of buying into a separate platform. It accepts standard 1/4 in. hex impact bits, so you are not locked into unusual accessories. If you want a compact impact driver for fastening in tight spaces, want strong output, and are specifically trying to cut down jobsite noise, this is one of the more purpose-built options in the DEWALT lineup.
Built for Occupied Spaces
If you work in places where people are nearby, quieter operation is not a gimmick. It means fewer interruptions, less fatigue, and a better fit for service calls, remodel work, and punch-list jobs.
Hydraulic mechanism designed for up to 57% quieter operation during impacting
Good fit for offices, apartments, schools, healthcare facilities, and finished interiors
Fast on Larger Fasteners
This is not just a quieter alternative to a standard impact driver. It is built to keep production moving when you are driving larger screws and lags and need speed without switching to a bulkier tool.
Up to 3,000 RPM and 4,200 impacts per minute
Published claim of up to 40% faster driving in demanding applications
Compact Control in Tight Areas
Short head length and better lighting make a difference when you are tucked inside a cabinet, reaching around mechanical runs, or working where a shadow hides the screw head.
Compact 4 in. tool length helps with access
9-LED work light with 20-minute work light mode improves visibility
What's in the Box
(1) DEWALT DCF870 Hydraulic Impact Driver
(1) Belt Hook
(1) Owner's Manual Battery and charger sold separately.
