Notes on balancing, vibration and measurement
The questions we meet in the field, the standards behind them and the methods that work, explained plainly.
Envelope Analysis for Early Bearing Fault Detection
Learn how to set up envelope analysis on site – pick bands, compute BPFO and BPFI, read demodulated spectra, and decide when a bearing needs action.
Soft Foot – What It Is and How It Ruins Shaft Alignment
Learn to find and fix soft foot before aligning a machine, so your laser alignment results hold and bearings last their design life.
Misalignment or Unbalance? Spectrum and Phase Tell Them Apart
Use 1X amplitude, 2X patterns, phase readings across bearings and orbit shapes to separate misalignment from unbalance before you correct a machine.
How to Choose a Trial Weight in Field Balancing
Pick a trial weight that produces a measurable response without overloading the rotor – rules, formulas, and a site checklist for single- and two-plane balancing.
Fan Unbalance Signs and When to Balance On Site
Recognise unbalance symptoms on fans, separate them from misalignment and bearing faults, and decide when field balancing beats a workshop overhaul.
How Do Bearing Faults Show Up in Vibration? BPFO, BPFI, BSF and FTF
A practical guide to bearing fault vibration symptoms, calculating BPFO, BPFI, BSF and FTF, envelope analysis and the four stages of bearing failure.
Predictive Maintenance: Seeing Failures Early with Vibration Analysis
What is predictive maintenance, how does it differ from preventive maintenance and which faults does vibration analysis reveal early? A practical guide with the P-F curve and programme steps.
ISO 21940-11 Balance Quality Grades: How to Choose G6.3 or G2.5
What are ISO 21940-11 (formerly ISO 1940-1) balance quality grades, how is Uper calculated and which G grade suits fans, pumps and motors? A guide with a worked example.
What Is Field Balancing? A Step-by-Step Guide to On-Site Balancing
Learn what field balancing is, how it differs from shop balancing, when single or two-plane balancing is needed and how it is done on site, step by step.
Is your machine vibrating? Talk to us before it stops.
Tell us the equipment type, speed and the symptom you see. We will agree the measurement plan, the visit date and, if needed, the machine or controller solution.