# On-site dynamic rotor balancing > We eliminate vibration in rotating equipment right at your site in Portugal — without removing the rotor. We measure first, find the cause, and only then balance. Source: https://axiline.pt/en/ ## What we do From the initial measurement to the final check, plus instrument supply and staff training. Our main focus is dynamic on-site balancing. ### On-site rotor balancing We correct imbalance directly on the installed machine, in one or two planes, without removing the rotor. This is the right choice when measurements confirm that the vibration is caused by imbalance. ### Vibration diagnostics We measure vibration parameters, combine them with the machine's history and a visual inspection, and rank the likely causes — so you fix the right problem first. ### Impeller and fan balancing Fans, smoke exhaust fans, and supply air units. Two-plane balancing of the impeller in its own bearings — quieter and vibration-free. ### Vibration analysis Level, spectrum, speed, and phase. You find out where the machine vibrates, how strongly, and at which frequencies. One high number on its own is not yet a diagnosis. ### Balanset-1A instruments A portable two-channel vibration analyzer and balancer — the same instrument we use on site. For those who want to balance equipment themselves. ### Training and support We explain the measurement method and hands-on work with the balancing instrument, so your team can balance equipment on its own. ## What it costs The price has two parts: vibration diagnostics with a report, €300 per unit — always payable, and balancing — only if the measurement confirms it's possible. Move the sliders and the calculator will instantly show both amounts: the full job, and the option if balancing turns out not to be possible. Preliminary estimate. Minimum invoice per visit €500, minimum 4 hours on site; for work lasting more than a day, a per-diem of €140/day applies. All prices exclude VAT. An exact quote follows after photos of the machine. ## Site requirements For the visit to succeed in a single trip, we need a few things from you — small, but important. Here's what should be ready before we arrive. ### ⚙️ The machine is in working order Balancing is only carried out on machines that are in good working order and properly secured in place: bearings in working condition, frame free of cracks, fasteners tight. If we find a fault during inspection, repairs are needed first. In that case, we carry out vibration diagnostics, identify the cause, and prepare a report — and charge only for diagnostics and travel, not for balancing. ### 🧹 The rotor is clean Caked-on dust, dirt, and product buildup are themselves a source of imbalance: it sticks today, it flakes off tomorrow. The rotor needs to be cleaned before balancing — otherwise the result won't hold, and the money will be wasted. If cleaning isn't possible on site, we'll tell you honestly before starting the work. ### 👷 Someone responsible for start-up and shutdown Balancing requires 3–6 start-ups of the machine. We need one of your staff who knows the equipment, operates the start-up and shutdown, and is responsible for job safety and work authorization. Our specialists do not operate your equipment themselves — this is a safety rule. ### 🔌 Mains power 220 V, 50 Hz A standard 220 V outlet is needed near the machine to power the measuring instrument and laptop. An extension cord works too — what matters is stable power during the measurements. ### 🔧 Access to the machine We need access to the bearing housings to mount the sensors, space for a reflective marker on the shaft, and access to the rotor to fit the weights — an open hatch, a removed cover, or a window in the casing. If access requires disassembly, we'll agree on that in advance. ### 📸 Not sure the machine is ready? Send us photos of the unit and its nameplate, plus a short video of it running, on WhatsApp — before the visit, we'll tell you what to prepare, whether on-site balancing is possible, and how much it will cost. This is free. ## Frequently asked questions **Can you balance a rotor without removing it?** Usually, yes. Balancing is performed in the machine's own bearings, provided there is safe access, the rotor runs stably, and conditions allow for several start-ups. **Does strong vibration always mean imbalance?** No. Shaft misalignment, worn bearings, loose mounting, resonance, or parts rubbing against each other can shake a machine just as much as imbalance. That's why we measure first and only add weight afterward. **How is the price calculated?** Two parts: vibration diagnostics with a report, €300 per unit (always payable) + balancing based on rotor size (S +€250, M +€450, L +€700, XL from +€1,200), one or two planes included. If balancing isn't possible — for example, the bearings are worn out — you pay only for diagnostics and travel, and receive a report stating the cause. Attaching the weights: your own staff — included; our fitting work without welding +€150, with welding +€400 per rotor. Travel: 20 km included, then €0.60/km round trip. Minimum invoice — €500, + VAT. **Do you work outside Porto?** Yes. We're based in Vila Nova de Gaia, and we schedule visits across all of Portugal. Let us know where the machine is, and we'll sort out the travel. **What documents do you provide after the job?** A balancing report with vibration readings before and after, the mass and position of the correction weights, and, if needed, an assessment of the machine's condition.