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Albert Einstein He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).


The first integrated circuit invented by the engeneer Jack S. Kilby1 (1923-2005) contained only a few transistors. Texas Instruments.
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Pulley STL files (Homemade electric scooter)



Download the .zip file with the the STL files below

These are very simple examples. I’ve printed them using my Creality CR10 printer with 4 perimeters, 45% infill and a 0.4 nozzle. You have different sizes, print the one that more suits your project. In my case I've used pulley8.stl which is the red one in the photo below.


STL pulley 3D electric scooter



Ok guys so now you have the pulley. It has a hole for the one way bearing and some lines for the glue. Make sure the bearing is spinning in the right direction before you glue it in place as we can see in the photo below. In my case the shaft of the motor is 10mm diameter and it also has this streight cut. The only place where it is perfectly round is at the base that's why I've used pulley8.stl because it only use a one way bearing at the base. I've used pulley6.stl and the NOT-perfect shaft of the motor broke the bearing.


STL pulley 3D electric scooter