Conveyor belt systems are vital for the continuous transport of bulk materials in fixed plant environments, such as mining and manufacturing facilities. However, these systems are subject to harsh operational conditions that lead to various failure modes. Research indicates that failures can be broadly categorized into belt-specific damage and mechanical component malfunctions (Liu et al., 2019).
Belt-specific failures
The conveyor belt itself is often the most vulnerable component. Common failure modes include:
Longitudinal Tearing and Surface Degradation: Belts are highly susceptible to longitudinal tears, often caused by the impact of sharp objects or falling materials at discharge points (Urban et al., n.d.). Continuous material impact also leads to surface gouges and “core degradation,” where the internal strength-carrying members are compromised (Urban et al., n.d.).
- Abrasion and core damage: external wear typically involves cover abrasion, while internal damage manifests as cracks, bends, and corrosion of steel cords (Błażej et al., 2025). The type of transported material significantly influences these rates; for instance, overburden is far more abrasive than coal (Błażej et al., 2025).
- Operational deviations: mistracking or “belt deviation” occurs when the belt shifts from its intended path, often due to uneven force distribution or non-parallel rollers (Wang et al., 2023). If left unchecked, this can lead to friction-induced fires (Wang et al., 2023).
Mechanical and drive system failures
Beyond the belt, the mechanical infrastructure—including drives, gearboxes, and pulleys—faces significant stress.
- Gearbox and drive failures: the geared reducer is frequently cited as the most complex and failure-prone component of the drive system (Lakay, 2024). Failure modes here include gear tooth pitting, fracture due to fatigue, and shaft failure resulting from repeated stop-start cycles (Lakay, 2024).
- Pulley and idler issues: pulley failures often stem from bearing wear, shell degradation, or coating failure (Zimroz & Król, 2011). Similarly, idlers—the rollers supporting the belt—can deform or fail to fit the belt properly, accounting for a significant portion of system stoppages (Tau et al., 2023).
Conclusion
Understanding these failure modes is essential for implementing effective predictive maintenance. By monitoring factors such as belt tension, motor temperature, and vibration, industrial plants can mitigate the risk of catastrophic failure and unplanned downtime (Liu et al., 2019; Wang et al., 2023).
References
Błażej, R., Jurdziak, L., & Kirjanów-Lipińska, A. (2025). Analysis of uncertainty in conveyor belt condition assessment using time-based indicators. Applied Sciences, 15(14), 7939. https://doi.org/10.3390/app15147939
Lakay, A. (2024). An overview of the common conveyor drive failures. Beltcon.
Liu, X., He, D., Lodewijks, G., Pang, Y., & Mei, J. (2019). Integrated decision making for predictive maintenance of belt conveyor systems. Reliability Engineering & System Safety, 188, 347–351. https://doi.org/10.1016/j.ress.2019.03.047
Tau, A. L., Edoun, E. I., Mbohwa, C., & Pradhan, A. (2023). Analysis of equipment failure in a production line of a coal fly ash plant. Proceedings of the International Conference on Industrial Engineering and Operations Management. https://doi.org/10.46254/au02.20230103
Urban, et al. (n.d.). A surface defect detection system for industrial conveyor belt inspection using Apple’s TrueDepth camera technology. Applied Sciences, 16(2). https://doi.org/10.3390/app16020609
Wang, M., Shen, K., Tai, C., Zhang, Q., Yang, Z., & Guo, C. (2023). Research on fault diagnosis system for belt conveyor based on internet of things and the LightGBM model. PLOS ONE, 18(3), e0277352. https://doi.org/10.1371/journal.pone.0277352
Zimroz, R., & Król, R. (2011). Failure analysis of belt conveyor systems for condition monitoring purposes. Mining Science, 18(1), 259–270.
