MRC24 - 3d printed micro RC Rock Crawler

MRC24 is a micro RC Rock Crawler in approx. 1/24 scale using small hub motors to directly drive all wheels. It's a fun toy to climb slowly rocks and terrain. 

All main parts are 3d printed: chassis, front and rear axle. However, you will need additional electronics and hardware to complete the crawler. Basic 3d printing and RC knowledge is recommended before starting this build. Feel free to mod parts and share them by using the hashtag #mrc24.

Build

BOM

Here is the the bill of materials. I linked to the sellers where I bought my stuff. Of course you can use similar parts / same parts from different vendors too. Links to Aliexpress are not affiliate links but you can get me (2$) and yourself (4$) a coupon by using the following link: https://a.aliexpress.com/_EHlIzXL

3d printed parts

7 files, overall 10 parts (print wheels 4x). Prints sliced by SuperSlicer are tested on a Vz235 using Esun PLA+ with 99% infill. 

Electronics

• RC - e.g. Radiomaster MT12

• 8mm Servo - e.g PTK 7308 (with standard horizontal ears)

• brushed ESC - simple / dual channel

• 4x N20 motors (I used 200rpms/6v for 2s)

Wheels

• 1" wheel tires - e.g. Injora Comp Pins

Hardware

• Linkset - Balljoints M2

• 4x Dampeners

• M3 Screws/nuts: 2x to mount knuckle on front axle

• M2 Screws

• 4x Mr63zz 3x6x2.5mm Bearings

• M2 heat inserts (OD3.5mm L5mm) 

• XT30 connector

• 2s lipo

• Velcro Tie (battery)

• optional: Tungsten Weights (I used 1/4ounze; 9mm dia)

For a quick overview you can watch this