Bearings for construction machinery work under heavy‑load, impact and dusty conditions, which easily lead to various failures. Typical failures include fatigue spalling, overheating burning, abrasive wear, indentation & corrosion, electric erosion, cage deformation and fracture. Symptom includes abnormal noise, temperature rise, heavy vibration and abnormal clearance. Severe failures will cause equipment shutdown and raise overall maintenance cost.

ZHZB offers professional bearing inspection and repair service. We disassemble bearings and perform ultrasonic cleaning first. Damage condition is evaluated by flaw detection and clearance measurement. Bearings with cracks or heavy deformation will be rejected for repair to avoid over‑repair.

For repairable bearings with slight raceway scratch, corrosion and wear, we restore working surfaces by precision grinding and superfinishing. Damaged rolling elements, cages and seals will be replaced with parts matching OEM working requirements. Precision and clearance will be strictly verified before delivery to restore bearing performance.

Not all bearings are suitable for repair. ZHZB follows strict quality standards to judge repairability. We help customers cut spare‑part cost and extend service life, delivering cost‑effective bearing solutions for excavators, mining machinery and other construction equipment.