This drill gun is made using a DC motor. It has a removable battery, a custom-made battery pack using 18650 cells, and BMS. The body is 3D printed.

The DC motor used in this project is high-speed and high-torque(12v). The battery configuration is 3S2P (12.6v max)

Supplies

1-10mm drill chuck (preferred M10 thread) - 1
DPDT rocker switch - 1
18650 cells - 6
3S 6A BMS - 1
Momentary switch button - 1
XT60 connector - 1
12v High-speed DC motor - 1
M3 bolts
3D printed parts
Chuck adaptor (custom fabricated) - 1

Step 1: Design

For the design, I started with noting down the dimensions of the bought-out parts. Did a rough sketch of the body and the placement of the components. By using these inputs, I did the CAD design.

Step 2: 3D Printing

After designing in CAD, I had to make some changes to the design to make it 3D print ready. There are 5 different parts. All parts were printed using FDM printing, PLA material with 50% infill. Some parts needed to be sanded and painted. Finally, the parts are ready for assembly.

Step 3: Battery Pack

For the motor, we need a 12V source. For this, I chose to build a battery using 18650 cells. 6 cells, 3S2P. This cell configuration is then connected to a 3S 10A Li-ion 18650 Charger Protection Board. The power output of the BMS is connected to XT60 female connector.

Step 4: Wiring and Assembly

The wiring is quite simple. The motor is connected to a DPDT switch for direction control (pic1). The wires from DPDT are connected to XT60 male connector through a push button, which will be the trigger for the drill gun. The adapter is mounted to the shaft of the motor, using two M3 grub screws.