Close-up of a damaged bearing
Close-up of the damaged bearing.

Electric current passage in a gearbox bearing

This case study deals with a gearbox bearing failure in a tire manufacturing plant. It involves RPM measurement troubleshooting and also demonstrates atypical differences in prewarning times between the measuring techniques used.

The plant has been using equipment and monitoring systems from SPM since 2011 to optimize production and prevent downtime. In this case study, an incorrect assembly of the coupling and grounding caused a gearbox bearing failure due to the passage of electric current. The issue was resolved by adequately mounting the coupling and grounding, and the gearbox is now running normally again. The gearboxes in the mixing line are a demanding application for condition monitoring due to their fast-changing output speed and the challenging environment in which they operate.

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Case Study
Filename/description Language Size Modified
CS_035B_Electric current passage in gearbox bearing.pdf English (United Kingdom) 8 MB 8/15/2023
This case study from a tire manufacturing plant deals with a gearbox bearing failure caused by electric current passage.

HD Technologies

High-definition condition monitoring technologies provide exceptional pre-warning times, maximizing the planning horizon for maintenance and repairs. In turn, this enables fully utilizing asset life, cutting repair costs, and minimizing the consequences of unplanned downtime.

Intellinova online systems

With Intellinova, our unique HD condition-monitoring technologies can be fully utilized to successfully provide earlier warning of mechanical problems than any other monitoring technology.


In the competitive automotive industry, ensuring uninterrupted production is vital. SPM is a trusted partner to top manufacturers, offering essential condition-monitoring solutions for paint shops, air handling units, presses, and test machinery.