“The causes of unexplained failure of IKO rotary table bearing during operation may include defects in manufacturing, inadequate lubrication, excessive loading, misalignment, contamination, or fatigue due to cyclic stress, which require thorough investigation and corrective actions to prevent future failures.”
1. Contact fatigue failure
Contact fatigue failure refers to the failure of IKO bearing working surface caused by alternating stress. Contact fatigue spalling occurs on the working surface of rotary table bearing, which is often accompanied by fatigue cracks. It first occurs from the large alternating shear stress below the contact surface, and then extends to the surface to form different spalling shapes, such as pitting or pitting spalling, and spalling into small flakes is called shallow spalling. Due to the gradual expansion of the spalling surface, it often expands to the deep layer, forming deep spalling. Deep spalling is the fatigue source of contact fatigue failure.
2. Wear failure
3. Fracture failure
4. Clearance change failure