Steel ball is a spherical part made of steel, which is widely used in many fields due to its high strength, hardness and wear resistance. The following are some main uses of steel balls:

Bearings: In machinery and vehicles, steel balls are often used as rolling elements in rolling bearings. They reduce friction, reduce wear, and help equipment run smoother.

Grinding and Polishing: Steel balls are often used in grinding and polishing operations due to their hardness. They can be used to grind and polish hard materials such as metal, stone, and glass.

Filling and Support: In some cases, steel balls can be used as fillers, such as adding steel balls to concrete to increase strength. Additionally, steel balls can also be used as support structures, for example in construction projects.

Experiments and Testing: Steel balls are also widely used in scientific experiments and industrial testing. For example, in material testing, steel balls can be used to conduct wear tests to evaluate the wear resistance of materials.

Toys and Games: Although it sounds less common, steel balls are actually used in some toys and games. A classic example is a pinball machine, where steel balls are used as game elements.

Decoration and Art: Finally, steel balls can also be used as decorations or works of art. For example, they can be strung into necklaces or bracelets, or used to create sculptures or installations.

In general, steel balls are used in a wide range of applications, from industrial production to scientific experiments to toys and accessories in daily life. With the advancement and innovation of technology, the application fields of steel balls will continue to expand.