Block & tackle
thingiverse
In a 1.5-hour experiment, I cleaned a bearing using a screwdriver and discovered that it spins smoothly; in fact, even without any external force, the bearing continues to rotate approximately eight times due to its weight momentum.
Download Model from thingiverse
With this file you will be able to print Block & tackle with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Block & tackle.