During a routine monthly predictive maintenance sweep at a cement manufacturing facility, an analyst noticed a subtle change in the high-frequency emission of a critical raw mill gearbox. The overall velocity readings showed no noticeable change, remaining steady at 3.2 mm/s. Vibration Analysis Diagnostics
An industrial HVAC supply fan driven by a 45 kW induction motor began generating a high-pitched acoustic noise. The motor was running continuously at 1,500 RPM (25 Hz). Vibration Analysis Diagnosis
phase shift was recorded between the horizontal and vertical measurements on the same bearing housing. Practical Case Studies On Vibration Analysis Pdf
A chemical processing plant noticed a sudden increase in the overall vibration levels of a critical 75 kW centrifugal pump. The asset was operating at 1,780 RPM (approx. 29.6 Hz). Visual inspections showed no obvious defects, but the temperature of the coupling housing was slightly elevated. Vibration Analysis Diagnosis
High axial vibration levels on both pump and motor bearings. During a routine monthly predictive maintenance sweep at
“The machine tells you its problem – you just need to learn its language.”
The high axial vibration at 2X running speed combined with the 180-degree phase shift confirmed severe angular and offset misalignment . Corrective Action & ROI The motor was running continuously at 1,500 RPM (25 Hz)
The presence of BPFI peaks with 1X sidebands indicates an advanced Stage 3 bearing defect, meaning the micro-cracks on the inner raceway were deep enough to cause significant impacts during every shaft rotation. The Resolution