Luoyang Mingzhen Bearing Steel Ball Co.,Ltd

About Us

Production process
Home > Technical information > Production process

How steel balls are produced?

Heading: Cut the tested coil wire into short lengths and then compress each piece into ball shapes with heading machine. After this precess, each ball still has a protruding band (Burr) around the middle. It need to be removed in the next process.

Deflashing: Remove the burrs and produce a spherical shape with deflashing machine. In this process, the noise is very loud. It is because the balls are being ground inside grooved disks at a tremendously high pressure.

Heat treatment: Heat the balls with high temperature and then quench and temper them to give them sufficient strength and durability. Quenching means cooling the balls quickly from a high temperature. It will change the structure of the steel to make it harder but the balls are still brittle. Then the balls need to be heated again to a high temperature for further strengthening which is called tempering.

Grinding: This process adjusts the dimensional precision and finishes the balls to the stipulated dimensional difference with grindstone disks.

Finishing: Small size steel balls will do finishing to increase the material strength of the surface.

First lapping: The dimensional precision of the balls is further improved and they are finished to the specified dimensional difference.

Second lapping: Improve the balls' dimensional precision to the proper grade level and make the surface of the balls extremely smooth, shinny.

Visual inspection: All the completed steel balls will be visually inspected by our inspector to make sure no surface defects.

Other inspections: Size and roundness inspection, hardness inspection etc.

Packing: Visual-inspected steel balls will be packed into polybags and cartons with anti-corrosive oil.


If you have any enquiry about quotation or cooperation, please feel free to email us at or use the following enquiry form. Our sales representative will contact you within 24 hours. Thank you for your interest in our products.

Contact Us
Address: Liupo village, Mangling Town, Yanshi, Luoyang, Henan, China.
Tel: +86 (0)379 6439 0720
Fax: +86 (0)379 6439 0720
Home | About Us | Products | Technical information | Photo Gallery | News & Event | Contact Us | Mobile | XML