In-place field balancing, vibration analysis and predictive maintenance for fans, pumps, motors, crushers and separators. Measurement, correction and report in the same visit.
Hint: place the weight opposite the phase reading (180°), then tune the mass.
Answer five questions; we rank the likely causes and carry the result into the quote form in one click.
A rotor balanced in the workshop can vibrate again once installed, because of couplings, pulleys and bearing clearances. Field balancing corrects the machine in its own bearings at operating speed.
The rotor is not removed, so cranes, transport and workshop queues disappear. A single-plane fan is usually back in service the same day.
We confirm the source of vibration before balancing. If the problem is misalignment, looseness or a bearing, the report says so plainly.
Field Balancing (On-Site Balancing)
Every field balancing job closes with a measurable before/after report. The page below is an example prepared with representative values.
Request a QuoteField Balancing Report
Example — representative values, not customer data
APEX MACHINE RELIABILITY SOLUTIONS
| Measurement point | Before | After | mm/s RMS |
|---|---|---|---|
| NDE · H | 8.4 | 1.1 | |
| NDE · V | 6.1 | 0.9 | |
| DE · H | 7.2 | 1.0 | |
| DE · A | 1.8 | 0.7 |
Every job follows the same order; nothing is closed until a measurement confirms the result.
Horizontal, vertical and axial vibration at each bearing: overall level, spectrum and phase.
We confirm the problem really is unbalance, separating misalignment, looseness, resonance and bearing defects.
Single or two-plane balancing with trial weights and influence coefficients; laser alignment where needed.
Before/after values, ISO zone classification, weights applied and recommendations.
Balancing vectors, ISO tolerances, bearing and gear frequencies, resonance and fault-spectrum experiments. Free, no sign-up; your data never leaves your device.
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Field balancing is the dynamic balancing of a rotor in place — in its own bearings and at operating speed — without removing it. A portable vibration analyser and a phase reference sensor measure the amplitude and angle of the unbalance, and a correction weight is calculated and added to (or removed from) the correction plane.
Fans and blowers, pumps, electric motors, crushers, mills, separators, decanters, compressors, turbine and generator rotors, spindles and pulleys — practically any rotating machine with an accessible correction plane.
A typical single-plane fan balance is usually completed within a few hours, depending on access and safe stop/start conditions. For two-plane balancing and large rotors the duration becomes clear after the baseline measurement.
Unbalance appears as a dominant 1X (running speed) component, high in the radial direction and with a stable phase. Misalignment, mechanical looseness, resonance and bearing defects produce different signatures; we separate them before balancing to avoid the wrong fix.
Preventive maintenance follows a calendar and replaces parts even when they are still healthy. Predictive maintenance monitors actual condition data — vibration, temperature, ultrasound, oil — and schedules intervention when it is really needed, reducing both unplanned downtime and unnecessary part replacements.
Balance quality is reported against ISO 21940-11 (formerly ISO 1940-1) grades and machine vibration severity against the ISO 20816 / ISO 10816 evaluation zones. Where the customer or manufacturer specifies limits, those take precedence.
A practical guide to bearing fault vibration symptoms, calculating BPFO, BPFI, BSF and FTF, envelope analysis and the four stages of bearing failure.
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.
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.
Tell us the equipment type, speed and the symptom you observe; we will plan the measurement and site visit together.
Hello, I am Apex Assistant. Ask about balancing, vibration or predictive maintenance; I can point you to the quote form when needed.
Answers are AI-generated; technical decisions need on-site measurement.