A yo-yo (also spelled yo yo)is a toy consisting of an axle connected to two disks,and a string looped around the axle. It has some similarities to as lender spool.
A yo-yo is played by holding the free end of the string known as the handle (by inserting one finger—usually the middle or index finger—into a slip knot) allowing gravity (or the force of a throw and gravity) to spin the yo-yo and unwind the string(similar to how a pull string works). The player then allows the yo-yo to wind itself back to the player's hand, exploiting its spin (and the associated rotational energy). This
is often called "yo-yoing".
In the simplest play, the string is intended to be wound on the spool by hand; The yo-yo is thrown downwards, hits the end of the string, then winds up the string toward the hand, and finally the yo-yo is grabbed, ready to be thrown again. One of the most basic tricks is called the sleeper, where the yo-yo spins at the end of the string for a noticeable amount of time before returning to the hand.
Today I would like to introduce to you the important component of the yo-yo ball —— bearings.
YO-YO Bearings are used for driving. Good bearings can make the yo-yo have a longer service life, lower noise and achieve a higher speed according to the needs of users. Professional yo-yo bearings are manufactured according to the yo-yo movement principle and users' varied demands.
I believe that when we were a child,everyone's favorite toy should be yo-yo, especially boys.
Now there are special competitive activities about yo-yo, some people can play yo-yo to perfection.These are all supported by good bearings.