Lubrication issue on a felt guide roll detected with SPM LR/HR

This case study outlines the use of SPM LR/HR technology to monitor and extend the life of a felt guiding roll bearing in a paper machine's drying section. Condition data was collected through route-based measurements for over fourteen years, starting in 2008. Regular analysis with SPM LR/HR and SPM Spectrum allowed early detection of poor lubrication, leading to recommendations for re-lubrication, which extended bearing life.

Although no damage was detected in FFT spectrums, periodic re-lubrication significantly lowered shock pulse values and prolonged bearing lifespan. In February 2023, a sudden increase in SPM LR/HR values indicated inner race damage, prompting a recommendation to replace the bearing. Visual inspection confirmed this damage.

Overall, the SPM LR/HR technology helped the customer avoid unplanned downtime by providing early warning of lubrication issues and eventual bearing failure, extending bearing life to fourteen years.