Close this search box.

How are ball bearings made

Finished product testing room

Leading Paragraph:

When it comes to ensuring smooth and efficient operation in various machinery, ball bearings play a crucial role. Understanding how these essential components are made can provide insights into their quality and reliability. So, how exactly are ball bearings manufactured?

Ball bearings are made by letting spherical drops of molten metal fall inside a tall tower-called a shot tower-and solidify as they fall. They are then ground to size.
Next, let’s take a closer look at the ball bearing production process.

How are ball bearings made so round?

The process of making ball bearings perfectly round involves several meticulous steps. Initially, the flash is removed by a machine equipped with two cast iron discs, which smooth the bearing balls into a spherical shape. To enhance their durability, the ball bearings are then heated and tempered before being subjected to precise grinding that ensures they meet the exact spherical size required.

How do they get the balls into ball bearings?

Inserting balls into the bearing assembly involves a clever technique. The balls are inserted through a gap and evenly distributed around the bearing assembly, ensuring that the rings become concentric. A cage is then fitted to the balls to maintain their positions relative to each other, ensuring smooth operation within the bearing.

Are ball bearings difficult to manufacture?

Despite their seemingly simple structure, manufacturing ball bearings is a complex process that requires high technical expertise. The precision and quality required in ball bearing production make it an important measure of a country’s industrial capabilities. Small workshops can produce basic bearings, but achieving high precision and durability involves advanced technology and stringent quality control.

Which method is used to make ball bearings?

The primary method used in making ball bearings is called cold heading. This process involves smashing the wire ends together without heating, forming a rough ball shape with a small ring around it, known as a “flash.” This initial formation sets the stage for subsequent grinding and finishing processes.

What is the machining process for ball bearings?

Grinding is a critical machining process used in ball bearing manufacturing. It involves using abrasive wheels or belts to remove small amounts of material from the surfaces of the components. This precise process ensures that the ball bearings achieve the final shape, size, and surface finish required for optimal performance.

How are ball bearings made step by step?

  • Wire Cutting: The process begins with cutting steel wire or rod into small pieces.
  • Cold Heading: The wire pieces are cold-headed to form rough spherical shapes.
  • Flash Removal: The flash is removed using machines with cast iron discs.
  • Heat Treatment: The balls are heated and tempered to enhance durability.
  • Grinding: The balls are ground to achieve the exact spherical size.
  • Assembly: The balls are inserted into the bearing assembly and fitted with a cage.
  • Quality Control: Each bearing undergoes rigorous quality checks before being approved for use.

Understanding the intricate process of how ball bearings are made highlights the precision and expertise involved in their production. From the initial wire cutting to the final assembly and quality control, each step ensures that the bearings meet high standards of quality and reliability. If you have any questions or need further information about our products, feel free to reach out to us at NYZ.

Picture of YU YAN


NYZ bearing engineers, with extensive experience in the bearing field, provide you with the best solutions.

Table of Contents

Related Products

Bearing collection

Get a Free Consultation on Custom Bearings!

Need a bearing that’s just right for your specific needs? NYZ offers flexible customization services to ensure optimal performance and reliability. Reach out to us today for a free consultation and learn how we can create the perfect bearing for you. Click here to send your inquiry now!

Get the latest quote now

We will provide you with the most competitive prices and bearing manuals to help you better choose suppliers and increase your profits