While the ball bearing might be among Leonardo Da Vinci's less celebrated inventions, it's arguably one of his most important. Though it was initially designed as part of his failed helicopter ...

Ball splines and bearings: each play a role in mechanical function, and each are unique. All types of machinery are provided with supports for rotating shafts, and that supporting device is a ...

If the utility of an invention were somehow derived from the genius of its inventor, it would be pardonable that so many sources trace the idea for the ball bearing to a 1497 drawing by Leonardo da ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This is Aetna’s A-893-1 ball thrust ...