New Dewalt 20V Max High Torque Impact Wrench

Dewalt 20V Max Cordless Impact Wrench DCF900 Used on Lug Nuts

Dewalt recently announced a new 20V Max XR high torque impact wrench, DCF900, featuring a 1/2″ hog ring anvil.

The new impact is said to deliver 47% more torque compared to the DCF899 impact wrench.

The new Dewalt DCF900 impact delivers 1030 ft-lbs of max fastening torque, and 1400 ft-lbs of max breakaway torque.

Dewalt 20V Max Cordless Impact Wrench DCF900

Compared to its predecessor, the DCF900 delivers 47% greater fastening torque, and by my calculation about 16.7% greater breakaway torque, or reverse torque, which is used for nut-busting and removal purposes.

The Dewalt DCF899, which launched in various configurations 7-1/2 years ago in May 2015, delivered 700 ft-lbs of fastening torque, and 1200 ft-lbs of reverse torque.

The latest DCF900 impact features a new BatteryGuard technology, which is a shock-absorbing battery-to-tool connection that helps reduce wear and tear on the battery while you work.

Dewalt 20V Max Cordless Impact Wrench DCF900 Used on Steel I-Beam

The new impact wrench also has a Precision Wrench mode that helps to prevent overtightening when used in the forward direction, and fastener run-off when used in the reverse direction.

Dewalt 20V Max Cordless Impact Wrench DCF900 Driving Floor Anchors into Concrete

Dewalt says that the DCF900 is ideal for fastening large pipe flanges, grooved couplings, wheel lugs, concrete anchor bolt setting, and other commercial applications that demand power and efficiency to get the job done.

Dewalt DCF900 Key Features & Specifications

1/2″ drive
Hog ring anvil (for socket retention)
1030 ft-lbs max forward torque
1400 ft-lbs max reverse torque
0-2300 RPM
0-2200 IPM
Brushless motor
BatteryGuard battery connection
4-mode speed settings
Precision Wrench – helps prevent overtightening and fastener run-off
Variable speed trigger
LED work light with adjustable brightness
8.81″ length
Weighs 6.4 lbs

Here are the max fastening torque and speed ranges for each of the 4 modes, as per the online user manual:

Low: 100 ft-lbs, 0-650 RPM
Medium: 600 ft-lbs, 0-1040 RPM
High: 1030 ft-lbs, 0-2300 RPM
Precision Wrench: 0-820 RPM forward
Reverse: 0-2300 RPM in all modes

Precision Wrench Explained

With the DCF900 set to the Precision Wrench mode:

Forward Direction – the tool will fasten at 820 RPM until impact begins, then pause for 0.75 seconds before impacting at 2200 IPM, providing greater control and reduced chance of overtightening or material damage.

Reverse Direction – the tool will impact at normal speed (2300 RPM) and impact at 2200 IPM. When it senses the fastener has broken free, the tool will cease impact mode and reduce its speed to prevent “run-off” of loose hardware.