2447-20 M12 crown stapler
The 2447-20 is a cordless crown stapler for the M12 battery system manufactured by Milwaukee.
In 2021 it was the only stapler in the M12 system. The machine can fire up to 1500 staples on a single 1.5 Ah battery.
The machine can drive T50 staples with prongs of various lengths.
Exterior
The machine has a red plastic housing with a black rubberized back and front of the handle. The front and top side are almost completely straight allowing it to stand upright, on the front and upside down on a flat surface.
An M12 battery is inserted in the bottom of the handle. The handle attaches to the rest of the machine at the top and bottom.
The motor and gear housing are positioned vertically at the front of the handle. At the bottom on each side there is a threaded hole in which a metal belt clip can be screwed in on either side.
On the left side there are four LEDs below the belt clip that act as a battery charge indicator. Milwaukee calls this the "fuel gauge".
The top of the body contains a spring mechanism with a tension adjustment knob at the back.
At the front, on top is an LED light that illuminates the working area.
At the front of the machine is a black staple magazine. On the bottom is latch to pull out the magazine and load staples from below.
The staples up with a spring. There are openings on the sides through which they are visible and the top one acts as a reload indicator that allows the operator to see when the nails are almost used up.
At the very front of the machine is a metal "workpiece contact bracket" from which the staples exit and has to be pressed against the workpiece.
Operation
Before stapling the power adjustment knob should be used to set depending on the size of the staples and the hardness of the material.
To fire a staple press the tip against the workpiece and then press the trigger.
To work faster it is possible to keep holding the trigger and press the tip somewhere else on the workpiece to shoot another staple. This is called contact actuation because the machine is activated on contact with the workpiece.