Simple RC Car With Brushless Motor

thingiverse

I'm super excited to share this fun summer project with my son. We're building a sweet RC car that's totally affordable and easy to make. Here are the cool specs: Our car uses an incredibly cheap (under 10 euros) A2212 1000K brushless motor + ESC set from China, which we got from BangGood, Gearbest, or DX. It can reach speeds of about 30km/h on a 2S LiIon battery. Any 2-channel remote will do the trick for controlling our car's speed and direction. We're using a 9g servo for steering, connected to the steering mechanism with 1.5mm music wire. The servos come with two mounting screws, which we use to secure them in place. Most of the parts are 3D printed in grey ABS plastic. You can print all the parts without supports on any FDM printer if you orient them correctly. We're using a 6mm round aluminium rod for the shaft and axes - it's the perfect material for this project! All the bolts (we think there are around 26 of them) are M3x10mm Phillips cheese-head screws, with standard M3 nuts to match. If you want extra security, we recommend using washers under the nuts. The king pins for the front steering are made from 4mm round material - we used brass tube, but feel free to use whatever you have on hand! Our car has two 626ZZ and one 624ZZ bearing to keep everything running smoothly. We also have some spare washers that can be used as distancers for the wheels. The tires are a bit of a challenge, but don't worry - we've got you covered! You can either print them from flex filament or cast them from 2-part silicone using 3D-printed molds. We chose to cast ours, and it turned out amazing! Now that we've covered all the parts, let's talk assembly. Both gears are press-fit mounted: the small one directly on the motor shaft and the large one on the 6mm rear-shaft. The rear wheels just press onto the shaft - if you pre-drill them with a 6mm drill, they'll fit perfectly. Use some 6mm washers as distancers between the rear wheels and bearings. The front wheels are drilled with a 6.2mm drill and turn freely on the axle. They're secured with press-fitted caps, which need some 6mm washers to keep everything in place. We had an absolute blast building this RC car, and we hope you do too! Check out our project files on Grabcad: https://grabcad.com/library/3d-printed-rc-car-with-brushless-motor-1 And if you want to see our car in action, check out this awesome YouTube video: https://www.youtube.com/watch?v=QgrKxEjiJhY