Ball mill at the Asarel Medet copper mine.

Pinion bearing damage in ball mill

Using HD measurement technologies, Bulgarian copper producer Asarel Medet AD monitors the mechanical condition of critical equipment in the open-pit mine and flotation plant. This case study deals with the successful detection of outer race damage on a ball mill pinion bearing.

On the non-drive end bearing, the Intellinova online system initially indicated shock pulse levels that varied between green and yellow condition evaluation. This fluctuation was attributed to the operating conditions, with varying loads on the ball mill. Over the following months, bearing condition deteriorated, and when the bearing was replaced during a planned stop about eleven months after the first yellow readings, outer ring damage was verified.

Download full case study

Case Study
Filename/description Language Size Modified
CS_023B_Ball_mill_Asarel_Medet_BG.pdf English (United Kingdom) 3 MB 9/6/2019
Outer race damage on ball mill pinion bearing in copper mine.


In this heavy industry, condition-monitoring equipment must withstand mechanical and environmental forces as well as potentially explosive atmospheres. The SPM product range fits the bill.

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.

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.