Hundreds of marbles, ball bearings and homemade catapults have been ... a catapult with you in public and you have or you intend to use it to damage property or harm a person or animal you are ...

Roller-type or ball bearings packed in grease inside all four wheel hubs allow wheels to spin freely without generating excessive heat while supporting the weight of the vehicle. In addition ...

It works by pressing the edge of three bearings fairly hard up against a smooth rod, at an angle. The bearings actually squeeze the rod a little bit, making a temporary indentation in the surface ...