“Age before beauty” dictated that we start with the 14.4V Impactor, so we grabbed a 1/4″ quick-release 3/8″ drive adapter, slapped a 3/8″ to 1/2″ drive adapter on it, attached a 15/16″ impact driver socket to it, and went to town.
The 14.4V easily and quickly drove the screw, hammering like hell all the way. As you can see from the video below, the whole process took about 48 seconds.
Next we applied the same crazy-ass adapter-adapter-socket rig to the PS40 and gave it a shot at the same task. The absurdity of using the PS40 for this kind of job is clear when you consider that the screw is almost bigger than the driver!
As you can see, this task is definitely out of the PS40’s league. It did, however, drive the screw. It took about 3 minutes and an almost an entire battery charge cycle, but it did drive the screw. While we wouldn’t recommend the PS40 for the task, it’s worth noting that if you were stuck on the jobsite with only the PS40 and just had to drive a screw this big, you could get the job done.
While both drivers took a rest, we threw all the batteries back on their chargers and set up the sheet metal test, this time using a simple 1/4″ quick-release 1/4″ socket as the sheet metal screws had hex heads.
First the PS40:
The PS40 drives these screws quickly, spinning them for just a brief moment before the end drills in and the threads grab. After about 50 screws, though, the PS40 began to get a bit warm. As with the PS20, we feel this is caused by the vent placement. On such a small tool, there’s really nowhere to vent exhaust air except at the rear of the tool. When you put a second hand on the tool to “bear down,” it’s easy to cover the vents which can lead to heat buildup.
After 78 screws, the PS40 was hot to the touch, but kept on driving.
After 100 screws, it was so hot we were glad we were wearing gloves. Finally, on the 112th screw, it finally quit all at once in the way we’ve come to expect from li-ion tools.
That’s a pretty impressive runtime, and after just a moment to swap in the other battery, we were able to use the PS40 to remove all the screws as well. The removal task was much easier on the tool, and the PS40 cooled down completely during the process.
As you might imagine from the specs, this task was a walk in the park for the 14.4V Impactor. It spun up to full speed quickly and drove each screw like a bat out of hell.
Also, it stayed cool during the entire test, mostly because its larger size accommodates side vents in addition to those on the rear. During the test we could feel the hot air moving from the side vents.
We managed a whopping 225 screws on a single charge with the 14.4V.
Read on to page five for our conclusions.