AF D4 bulldozer 1:14 RC

AF D4 – 1:14 Scale Remote-Controlled Bulldozer (3D Printable Model)

This detailed RC model is inspired by the iconic CAT D4 bulldozer and designed specifically for 3D printing enthusiasts and RC hobbyists. Featuring full remote-control functionality – from tracked drive to moving blade – it’s both a challenging and rewarding build.

Optimized for FDM 3D printers with a 0.4 mm nozzle, most parts print support-free. The model is organized into clear assembly sections for easy navigation, and the files include a calibration STL to help ensure a perfect fit.

📺 See the bulldozer in action!

https://www.instagram.com/angryflite/reel/DIt_N4ropLK/
https://www.instagram.com/angryflite/reel/DIwgQRTI70a/
https://www.instagram.com/angryflite/reel/DIqS2GFIPnY/

The download package includes:

• All STL files organized by function

• A detailed assembly guide

• A complete hardware list (screws, electronics, and mechanics)

Print it, build it, bring it to life! 🛠️🚜

Before you start

Printer Calibration

• Before starting the print, make sure your printer is properly calibrated.
• In the ZIP package, you will find a file named test_part.stl – place a MR128ZZ bearing into it.
• The bearing should fit with a slight resistance. If it does, your printer is well-calibrated.

Print Settings

• This project is designed for FDM printers with a 0.4 mm nozzle.
• Filament: PLA, PETG
• Layer height: 0.2 mm
• Infill: minimum 30% (any pattern is fine).
• Wall count: at least 3 walls (feel free to increase if needed).
• Most parts can be printed without supports.
• Files that require supports are labeled, e.g., BL001_addsup.stl – you can generate supports in your slicer.
• Alternatively, you can use pre-supported versions of the files – labeled as BL001_presup.stl.

Print Quantity

• The instruction includes information on how many pieces of each part to print.
• Files that need to be printed multiple times include a multiplier in the file name, e.g., C004_x2.stl – print 2 pieces of this part.

File Categories

• The files are grouped into 5 sections based on their placement in the model: Base section, Engine section, Blade section, Cabin section, Tracks section
• Each part in the ZIP archive has a unique identifier, which corresponds with those mentioned in the instructions.

Assembly Notes

• Some parts need to be glued together.
• Use CA glue (cyanoacrylate) or any universal adhesive – parts requiring glue are clearly marked in the instructions.

I wish you tons of fun during the build – and even more once the model is complete!

Online build manual: https://manuals.angryflite.com/en/af-d4-bulldozer-1-14-rc

Bill of Materials:

Part name	Quantity	AliExpress
M2 x 4 mm screw DIN 965	198 pcs	https://s.click.aliexpress.com/e/_omegdD5
M2 x 12 mm screw DIN 912	4 pcs	https://s.click.aliexpress.com/e/_olcWIon
M2 x 14 mm screw DIN 912	3 pcs	https://s.click.aliexpress.com/e/_olcWIon
M3 x 6 mm screw DIN 912	4 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 6 mm screw ISO 10642	8 pcs	https://s.click.aliexpress.com/e/_oltsEx5
M3 x 8 mm screw DIN 912	8 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 10 mm screw DIN 912	12 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 12 mm screw DIN 912	2 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 14 mm screw DIN 912	17 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 16 mm screw DIN 912	9 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 16 mm screw ISO 10642	79 pcs	https://s.click.aliexpress.com/e/_oltsEx5
M3 x 18 mm screw DIN 912	2 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M3 x 20 mm screw DIN 912	23 pcs	https://s.click.aliexpress.com/e/_oDr3uYn
M2 nut	201 pcs	https://s.click.aliexpress.com/e/_onS4C0B
M3 nut	154 pcs	https://s.click.aliexpress.com/e/_onlyJ43
4 x 1 mm magnet	28 pcs	https://s.click.aliexpress.com/e/_ol4GXFp
3 mm LED	8 pcs	https://s.click.aliexpress.com/e/_omsg9yj
2835 SMD LED	8 pcs (alternatively)	https://s.click.aliexpress.com/e/_oCeqF0j
4010 fan	1 pc	https://s.click.aliexpress.com/e/_oDsy5cb
MR128ZZ 12x8x3.5 mm bearing	2 pcs	https://s.click.aliexpress.com/e/_oEARlzl
Linear actuator 21 mm stroke 30mms 12V	2 pcs	https://s.click.aliexpress.com/e/_oppBfIX
Linear actuator 30 mm stroke 30mms 12V	2 pcs	https://s.click.aliexpress.com/e/_oppBfIX
6 mm flange shaft coupling	2 pcs	https://s.click.aliexpress.com/e/_okNqYuP
JGY370 40 rpm / 12V motor	2 pcs	https://s.click.aliexpress.com/e/_oEO09d5
Brushed ESC ~30A	6 pcs	https://s.click.aliexpress.com/e/_op7aMHZ
Li-Po battery 2000 mah 3S	1 pc	https://s.click.aliexpress.com/e/_oC9LsH1

ZIP package includes:
– STL files
– Build manual

—
update: 9.04.2025
– release

LICENSE:
What you can:
– print STL files how many you want
– modifying and add upgrades for yourself

What you can’t:
– sell STL files
– print and sell like your own product
– use this files commercial
– share third person (if you want to share files, just share link to store)