A ball bearing is a kind of rolling element that utilizes balls to separate the moving parts of the bearing. The balls are usually made from steel or ceramic and therefore are to deliver frictionless movement between the different parts of the bearing. The utilization of roller bearings return to Roman times where they found them on Roman ships which were integrated 40 A.D.
It was Leonardo da Vinci who first discovered the concept as well as the mechanics of employing balls in the bearing but it was only until 1791 where Phillip Vaughn, an English carriage maker, patented the initial axle to work with the ball bearing.
Ball bearings are definitely more commonly used in machinery and in appliances. There are several interesting and different ways to use ball bearings for instance Earthquake Proof Buildings. The San Francisco Airport Terminal uses tapered roller bearings to help you it withstand the consequences of an earth quake. Throughout the airport there are actually over 200 columns, and each column is placed more than a ball bearing having a diameter of 5 feet so with regards to an earthquake it separates the floor in the building. After the sppherical has finished the columns are centered across the balls in the force of gravity.
There are many different varieties of ball bearings including Magnetic Bearings, which can be used in high-speed devices. These devices can go as fast as 50,000 revolutions each minute, an ordinary bearing would melt or explode at this speed however the magnetic bearing are equipped for this. Another is definitely the ball bearings which are widely used to move huge and very heavy objects. The Egyptians first used this concept when building the pyramids and it is still used today.