Case study from the Cement industry – Finish Mill Separator
Machine: Finishing mill in a cement plant
Problem description
- Bearing outer race fatigue
- Higher than normal vibration
Spectrum indicating fault
- Test point: Inboard West Motor Radial
- Analysis name: Spectrum 60,000cpm or 1000hz
- Comment: Note harmonics of outer race
Spectrum indicating fault
- Test point: Inboard West Motor Radial
- Analysis name: Spectrum 60,000cpm or 1000hz
- Comment: Note harmonics of outer race
- Trend over 13 months
Spectrum After Repair
- Test point: Inboard West Motor Radial
- Analysis name: Spectrum 60,000cpm or 1000hz
- Comment: No sign of outer race defect
Root cause
- Defect area in the outer race of the bearing
- Could have been caused by many factors
- Lack of lube
- Dirt, etc.
