The short answer
Balancing is selected when unbalance is confirmed as a contributor. Vibration may also involve misalignment, loose connections, support condition and other causes. Begin by assessing when and how the symptom occurs.
One symptom is not a diagnosis
A report that equipment vibrates describes an outcome, not its cause. SKF's spectrum-analysis guide discusses different vibration sources and their indicators. Even a prominent component at rotational frequency does not replace an assessment of the machine and operating condition.
Record useful observations
Explain when the problem began and what changed: load, speed, repair, component replacement or installation. Note whether vibration is continuous or limited to a particular regime. Retain earlier reports and measurement locations where available. Comparisons should account for consistent operating conditions rather than a single headline value.
Distinguish the methods
Vibration diagnosis helps direct the investigation. Laser alignment checks and adjusts the relative position of connected machines. Balancing addresses unbalance in the rotating assembly. These methods may belong to one work plan but are not interchangeable.
Consider an on-site assessment
For an installed fan, pump or other machine, discuss on-site diagnosis and possible balancing. Access, construction, operating conditions and measurement safety must be assessed first. In-situ balancing is not suitable for every assembly. ALWAZEN agrees feasibility and scope after reviewing the available information.
Information for assessment
- Machine type and operating regime
- When the problem appeared
- Previous measurements and repairs
- Access conditions
Common questions
Does balancing guarantee zero vibration?
No. It addresses unbalance; other causes require their own corrective actions.
Should the machine be dismantled first?
Not necessarily. Agree the diagnostic objective first, since some measurements are made on the installed machine.
Technical reference
SKF — Spectrum AnalysisGeneral information for technical planning. Procedures and acceptance criteria depend on the equipment, inspection findings and manufacturer instructions.