123D Design Lego Brick

Introduction: 123D Design Lego Brick

About: 12 Years old want to be an engineer when I grow up, Skiing is my passion, I love to make things and am a straight A student, Proud to be Canadian I also <3 the outdoors

In this instructable i will be showing you how to make a Lego brick i don't have a 3d printer so it hasn`t been tested but i am almost positive it will work. If you have a 3d printer please consider printing it for me i will leave the file below

Step 1:

Dimensions of the main brick body Length: 31 mm Width: 15.5 mm Height: 9 mm.  Find primitives in the bar menu and select the cube enter in these dimensions 31, 15.5, 9.

Step 2: Placement of Studs

Firstly the studs have a radius of 2.5 mm and are 1.5 mm high. The studs are 1 mm from the sides, front, and back and 3 mm from each other. You may want to use a carpenters square to check that they are lined up perfect. 

Step 3: Bottom

First you will need to hollow out the bottom go into modify then shell once in the modify menu. Now a mini bar should have popped up on the bottom of the screen in the box that says thickness inside type 1 then click on the bottom of the square now you should have a hollowed brick. Now grab the cylinder from primitives and set it with a radius of 3 and a height of 9 now place centered in the brick 3 mm from the inside on one end. Now shell it with a inside thickness of 0.5 place two more exactly the same 1 mm from each other shell them too. Now you are done your 123D design Lego brick now you can send it off for 3D printing unfortunately i don't have a 3D printer so could one of you please tell me how it works thanks.

                                                                                                                                                                                    - TREX ZoaR0K 

                                                                                                                                                          P.S. Sorry for starting a lot of sentences with                                                                                                                                                                          now

Autodesk 123D Design Challenge

Participated in the
Autodesk 123D Design Challenge

Weekend Projects Contest

Participated in the
Weekend Projects Contest

1 Person Made This Project!


  • Game Design: Student Design Challenge

    Game Design: Student Design Challenge
  • Clocks Contest

    Clocks Contest
  • Block Code Contest

    Block Code Contest



9 years ago on Introduction

First, I want to thank you for the great effort for this instructable.
LEGO bricks have it owns standard dimension. So the bricks would fit together well. When we want to make our own 3D printed LEGO brick. We want to make sure that our 3D printed LEGO brick would fit well with the original LEGO bricks.
I made some mistake on my design, like the earlier version of the servo mount for LEGO (https://www.instructables.com/id/12-Thumbs-RC-LEGO-Dragster/#step1). And I wasted some money by ordered some 3D printed from the third party fabricator and it turned out that I could not used them with the LEGO bricks.

It seems to me that the dimensions of the brick is little off. My advice is to do some more research before settling with the dimensions.
Here are some links that I found useful,
or you could use the key word like, http://www.google.com/search?q=lego+brick+measurements&client=safari&rls=en&source=lnms&sa=X&ei=ZdsUUu3zKuHg2AWelYH4AQ&ved=0CAgQ_AUoAA&biw=1284&bih=705#fp=8fe0ec345e3f5309&q=lego+brick+measurements&rls=en&start=10
to find the dimensions of the LEGO brick.

Hope this comment is not discouraging you.