Best 12 Volt Cordless Impact Driver 2019
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Speed Test- Installing 10-16 x 3 Self-Drilling Screw - Winner Makita and Milwaukee
Both Makita and Milwaukee averaged 9 seconds. Hilti came in third with an average time of 9.7 seconds.

Speed -  installing 3” Star Drive Coated Screws– Winner Milwaukee

The following chart shows the results of this test:

Milwaukee averaged 1.5 seconds per screw and finished in first place. It beat out a win over the Dewalt by .58 of a second, which came in at 2.08 seconds.
Third was the Makita at 2.48 seconds.  Clearly the data shows a close race for this application, and that these tools are fast when installing 3” screws.

Runtime – Screws Driven Based On Adjusted Watt Hours – Winner Bosch
We used the 3-inch framing screws test to determine runtime. The most important/realistic result is comparing number of screws fastened per watt-hour.  By using watt-hour (total battery pack energy) we level the field for both voltage and amp-hours.

Watt-Hours is calculated by multiplying the voltage (actual voltage, not the MAX that some companies advertise) by the battery pack Amp-Hours. This calculation allows us to compare the total energy available to do the work based on both the voltage and size of the battery pack (amp-hours).

Bosch installed 145 fasteners and took a very comfortable first place. Second place went to Makita with 129 screws, followed closely in third place by Milwaukee with 126 screws.

Tool Temperature

During the runtime tests we observed some of the tools heating up, at the end of the runtime test, at the point of tool exhaustion we took temperature readings of the tool and batteries. We did not rank these measurements, but list them here for your information.


Best 12-volt Cordless Impact Driver Ergonomics Winner - DEWALT

For the ergonomics evaluation the team evaluated the following: grip, trigger switch, battery change, forward / reverse switch, vibration, balance, maneuverability, LED, Collet, and Speed change function / location.

For each category, the team ranked them 1, 2 or 3, (1 being the best)

The Dewalt took best ergonomics and is truly a comfortable tool to use, followed very closely by Makita.

The Dewalt took best score in every category and scored a 2 in the battery change. The Makita took best score in all categories except the collet and speed changing location. Third place went to the Bosch who excelled in the LED category, battery change and speed change button.

The Dewalt is a nicely sized tool,  at 5.05 inches long and 1.75 pounds it is extremely comfortable to use.

Decibels  - Winner Makita

These impacts all measured in a range of 94.1 to 99.6 decibels.

Decibel Procedure

Before we describe the tests we conducted, we wanted to talk a bit about sound-level test procedures.

Power Winner - Milwaukee, Metabo and Makita

We wanted to show you how they compared to each other in relative torque strength.

For this test, we used 3/8”x 8” lag bolts and installed them into three layers of 4x6 pressure treated lumber.

Three of the eight impacts were able to fully seat the 3/8" x 8" lag bolt; Milwaukee did it the fastest in 45 seconds, Metabo completed the install in 1:08 minute and the Makita did it in 1:10 minute.

The other impacts did not fare as well. The Dewalt was able to install the lag bolt 6-1/4" out of 8-inches and the rest were between 2-3" of lag penetration.

Price - Best 12-volt Cordless Impact Driver - Winner: Ridgid

Warranty – Winners: RIDGID / Hilti

Overall Best 12 Volt Cordless Impact Driver – Winner: Makita

The Best 12 Volt Cordless Impact Driver goes to Makita - by a long shot. Milwaukee came second and Dewalt a distant third.

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