Have you ever noticed abnormal sounds coming from mechanical equipment during operation? Or have you discovered cracks on bearings during maintenance? So why do bearings crack? Let’s analyze the reasons for bearing cracking:

1. Martensite structure must be fine: Coarse martensite is more brittle and even contains many microcracks, which can easily lead to grinding cracks;

2. Strictly control carbide levels: Carbides are brittle phases with low crack resistance and poor thermal conductivity. Controlling carbide levels can significantly reduce the likelihood of grinding cracks;

3. Minimize retained austenite: The thermal conductivity of retained austenite is only half that of martensite. The more retained austenite present, the greater the thermal stress during grinding, and the higher the likelihood of grinding cracks.

In general, ring fracture failure is relatively rare, usually caused by sudden overload. The cause is more complex and may be due to: bearing raw material defects (bubble shrinkage), forging defects (overheating), heat treatment defects (overheating), processing defects (localized burns or surface micro-cracks), host defects (poor installation, poor lubrication, transient overload), and so on. In addition, overloaded shock load or severe vibration may lead to ring fracture.

Kent bearing production of deep groove ball bearings uses GCr15 steel for the bearing steel. GCr15 steel is a type of high-carbon chromium bearing steel with low alloy content, excellent performance, and the most widely used. After quenching and tempering, it has high and uniform hardness, good wear resistance, and high contact fatigue performance. Therefore, the deep groove ball bearings produced have good impact toughness and fracture toughness, as well as excellent cold and hot working performance, and a long service life.