OpenRC Tractor MK3 TEA20 XL

Update 12-01-2025

• Part 40a was not the final version and it didn't fit, now is corrected.
• Part 4-2a (standard fit) was not correct, now is corrected
• Added parts 4-2a and 4-2b with even higher tolerance (loose fit).

Update 08-01-2025

• Steering parts 4-2, 22 and 5 were a tight fit. I added normal fit option with increased tolerance. You'll find them by (standard fit) option.

Update 06-01-2025

• Part 2b was mixed up with 4-2b. Uploaded correct one.

Description:

Last summer, a friend contacted me because he said he needed a bigger and more powerful OpenRC Tractor. He wanted to take a 10km ride and tow his scale boat with it. My reaction was… what??? 10km? That's crazy but… genius at the same time!! So I asked myself, what if I DO make it bigger? I started working on an 1/6 scale version of the MK3 TEA20 and after a lot of work, it's finally ready!

It's been more work than expected because I had to redesign several parts from scratch but the result (in my humble opinion) it's worth it.

As always, it's free and ready to be downloaded and 3D printed with your favourite 3D printer and your choice of colors, and it comes with video instructions too!

I truly hope that you love it and remember that you can support my work with likes, following me on social or with a coffee or a tip!

Long live the OpenRC Tractor!

Changes from normal size MK3

• 1/6 Scale
• Double linear actuators for rear arms
• Improved steering link scale details
• More powerful drive motors
• More scale detail
• Working PTO

Instructions:

Check these resources to help you with your tractor build and don’t forget to click “like” and share makes of your tractor.

• List of printed parts and settings to print
• List of hardware parts (and links to buy)
• Assembly videos
• Electronics connections attached on PDF (also on assembly videos)
• Video in action soon

Considerations:

• Some parts have a “sacrificial layer”. It was made this way to avoid using supports. You’ll just have to remove them manually before assembling. I use the tool from the BOM spreadsheet.
• All parts should be correctly oriented to print the way they are (let me know if they’re not).
• Total printing time is around 85 hours and uses 2,5 kg of plastic but, of course, that depends on the printer/settings you use.
• Recommended printing settings can be found in BOM spreadsheet
• I used a piece of electric wire to mimic motor pipes