Introduction: Diy Brushless Pump
make an easy brushless water pump
you can use it to make fountains, mini waterfalls, emegercy pump or wherever you want
we need
- 3d printer
- instand glue
- epoxic glue
- color spray
- soldering iron
- cutter or sandpaper
- cpu or gpu fan
Step 1: The Motor
find a brushless motor from cpu or gpu 0.5A at least
the brushless motor can run very very long time instead of a brushed one
and are very good for water pumps
Step 2: Tear Down
- remove the plastic ring from the shaft behind the fan
- remove the fan
- remove the ball bearings
- clean it all from dust
Step 3: Remove the Flaps
you will need only the center with the magnet and shaft
so brake gently all the flaps and make the center smooth with a sandpaper or cutter(be careful)
Step 4: Add the Cable
remove the cables and add one only at GND and +12v
many motors have 3 cables
- BLACK : GND
- RED : +12v
- YELLOW : fan speed tacho signal
this motor have 4 cables use only GND and +12v
- BLACK : GND
- YELLOW : +12v
- GREEN : fan speed tacho signal
- BLUE : pwm
Step 5: Make It Waterproof
add epoxy glue on the pcb to make it waterproof
cover carefully all the parts and take a look for any bubbles
then add a tape around the core
add epoxy to the core to protect the coils
Step 6: Make It More Waterproof
for better water resistance paint it with a spray to close any small holes
DONT use it in aquariums if you dont sure about the spray you use, maybe is not good for the life there! maybe some colors are a little TOXIC.
if you have any suggestion about that let me know!
Step 7: Shaft Holder
dont use ball bearings under the water
i use a shaft holder from a non ball bearing fan, i think is from
bronze?????
(is the same 3mm)
Step 8: Impeller
with instant glue add the impeller to the center of the magnet and shaft
Step 9: All the Parts Together
print the .stl file and resize them for your motor
put all the parts together and make sure for any leakages