Ball bearing is a type of rolling bearing that installs spherical alloy steel balls between the inner and outer steel rings in a rolling manner to reduce friction during power transmission and improve the efficiency of mechanical power transmission. Ball bearings cannot withstand large heavy loads and are more common in light industrial machinery. Ball bearings are also known as ball bearings.

Ball bearings mainly consist of four basic components: ball bearings, inner rings, outer rings, and retainers. General industrial ball bearings meet the AISI52100 standard, and the balls and rings are usually made of high chromium steel with a Rockwell hardness between 61-65.

The hardness of the retainer is lower than that of the ball and ring, and its materials include metal (such as medium carbon steel, aluminum alloy) or non-metal (such as Teflon, PTEF, polymer materials). Rolling bearings have lower rotational friction resistance than journal bearings, so at the same speed, the temperature generated by friction will be lower.

Ball bearings are generally used in low load mechanical transmission equipment. Due to the small bearing area of ball bearings, serious mechanical damage is prone to occur during high-speed operation. Therefore, in heavy-duty mechanical transmission, needle roller bearings are often used to increase the bearing surface, improve mechanical transmission efficiency, and reduce mechanical damage.