Simple Ball Bearing Car

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Introduction: Simple Ball Bearing Car

About: Our grandkids keep me busy!

Designed, 3D printed, assembled and tested in under one hour, "Simple Ball Bearing Car" uses a 3D printed single piece chassis with four neodymium magnets (6.35mm diameter by 1.6mm thick, used for the axles) and four ball bearings (14.5mm or 9/16" diameter, used for the wheels) to create a simple to print and assemble car that rolls quite far on smooth surfaces. It's a fun "first 3D printed" project that the kids and grandkids can help print and assemble (but please see "One final note, ..." below).

I 3D printed my "Chassis.stl" (the vehicle on the right in the cover photo) at .2mm layer height with 20% infill and no supports which completed in around 25 minutes. Next, using slip joint pliers, I pressed the four neodymium magnets into the magnet sockets in the chassis. Finally, I connected the four ball bearings (one each) to each of the four neodymium magnets and it was ready to roll! On a smooth wood floor, this model will coast 30 feet and further. If you wish to customize this simple design or examine the steps I took to create it, I've included the Autodesk Fusion 360 file "Simple Ball Bearing Car Chassis.f3d".

I updated the design to include "Chassis New.stl" (the vehicle on the left in the cover photo) which includes enclosing fenders for the ball bearings. I printed this version at .1mm layer height, 20% infill, and both with and without supports.

One final note, the neodymium magnets are small and the ball bearings easily separate from the chassis, so please use caution around the younger kids and grandkids (e.g. no eating the car parts!).

Designed using Autodesk Fusion 360, sliced using Cura 4.1, and printed in PLA on an Ultimaker 2+ Extended and an Ultimaker 3 Extended.

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    4 Comments

    0
    jk.llewellyn.designs
    jk.llewellyn.designs

    Tip 2 years ago

    Awesome! I remember one favorite car of my son's was a simple one that just loved to roll! Good job!

    0
    gzumwalt
    gzumwalt

    Reply 2 years ago

    Thank you very much, I'm glad you enjoyed it!

    Greg

    0
    zakbobdop
    zakbobdop

    2 years ago

    The design is so simplistic, I love it!

    0
    gzumwalt
    gzumwalt

    Reply 2 years ago

    Hi zakbobdop,

    Thank you, I hope you enjoyed it!

    Greg