Industries · 3 min read · Updated 2026-09-26

Ultrasonic cleaning in industrial manufacturing

Parts off the machining centre, the press, the grinder and the heat-treatment furnace, cleaned before inspection, coating, assembly or shipping. What a manufacturing shop asks of a cleaning tank, the cleanliness specifications that drive it, and the set-ups from a single ST tank to an MT multi-tank line.

Technical guide. Figures are taken from our own spec tables; for your process we confirm the settings with a cleaning trial.

Machined parts on a CNC machining centre

In a manufacturing plant, cleaning is a process step with a specification, a takt time and a cost per part, like any other. The cleaning tank is chosen the way a machine tool is: from the part, the volume and the result the next operation needs. Most of what we build for manufacturing is one of four things.

Four jobs

Cleaning after machining. Coolant and chips off turned, milled and drilled parts, out of blind holes and cross-drillings, before measurement, assembly or the next process. The commonest job and the one ultrasonic cleaning was made for; the machining residue article is the process, and CNC parts before assembly and threaded parts and blind holes follow it into assembly.

Cleaning before coating. Paint, powder, plating, anodising, PVD and bonding all fail on oil. A wash, a rinse, a demineralised rinse and a dry, with a water-break test at the end; see cleaning before coating, oil and grease and rinsing and drying.

Cleaning to a cleanliness specification. Hydraulic blocks, fuel-system and brake components, bearings and transmission parts to VDA 19 / ISO 16232 particle limits. A filtered line with an ultrasonic rinse, and a bath-change schedule tied to the measured residue; see hydraulic valves and blocks, bearings and precision parts before inspection.

Cleaning between operations. Grinding fines before heat treatment, drawing compound before forming, polishing paste before inspection, scale after heat treatment; see rust and scale.

What the shop asks for

  • Takt. Parts per hour decide tank count and heating power. One basket every ten minutes is a single tank; one every three is a line with two wash stations.
  • Repeatability. A programme per part family, stored on the machine, so the result does not depend on the shift. The UMX Pro, AL and AU controllers hold them.
  • Bath life. Coolant and chips kill a bath in days. Filtration and a skimmer stretch it to weeks; see filtration and bath life and ST or SF.
  • Handling. Baskets above 100 kg go on a lift or a carriage. Integration with a conveyor, a robot or a crane is specified in the enquiry.
  • Corrosion protection. Steel parts that wait between cleaning and the next step get an inhibitor in the rinse and a dry cycle.
  • Documentation. Cycle logs from the PLC, a foil test at delivery, and the maintenance routine written into the shop's system.

Set-ups

Volume Set-up
A few baskets a day, small and medium parts ST-96 to ST-206, 28/40 kHz, basket and hoist, rinse sink, drip rack
Daily cleaning, oily or chip-laden parts SF-225 to SF-360 with filtration and skimmer, ST rinse, DT dryer
Heavy parts or dense loads AL-300 to AL-1000 with lift, agitation and modular filtration; rinse and dry stations alongside
Line production, cleanliness specification MT multi-tank line: spray or ultrasonic pre-wash, ultrasonic wash, ultrasonic rinse, demineralised rinse, hot-air dry, under one carriage
Small precision parts, inspection and assembly UMX Pro 50L to 162L with programmes, demineralised rinse, dry

Materials

Steel and cast iron at 28 kHz with alkaline cleaners at 55 to 65 °C. Aluminium and light alloys at 40 kHz with inhibited light-alloy cleaners at 50 to 60 °C, short cycles, or the machined faces etch. Brass and copper with neutral or mild cleaners. Titanium and stainless with almost anything. Plated and anodised parts at 40 kHz, low power, short time. Plastics below their softening point.

Plant maintenance

The same tanks serve the maintenance side of a plant: industrial filters cleaned for reuse, and heat exchanger plates and bundles descaled during a shutdown.

Mechanical engineering, tool and die, and automotive component manufacture each have their own page: mechanical engineering, automotive. The articles below cover individual parts and processes as they are written. The quote article lists what we need to lay out a cleaning station or a line.

Applications in this industry

Complex geometry

Parts and contaminants · 4 min readCleaning threaded parts and blind holes with ultrasoundTapped holes, blind bores and internal threads trap chips, coolant and air. Why the trapped air is the real enemy, how part orientation, degassing and movement get the liquid in, which frequency suits fine threads, and how to get the liquid out again.

Degreasing

Parts and contaminants · 5 min readRemoving oil and greaseOil is the easiest soil for an ultrasonic bath and the one that kills the bath fastest. Chemistry, temperature and time for light machine oil, chassis grease and waxy lubricants, and why the skimmer matters more than the transducers once the parts come out clean.

Filtration

Parts and contaminants · 4 min readUltrasonic cleaning of industrial filters for reuseStainless mesh, sintered metal and wire-wound filters can be cleaned and reused many times; paper and felt cannot. Which filters are worth cleaning, how to get the dirt out of the depth of the medium rather than just its surface, and how to prove a cleaned filter is fit to go back into service.

Heat transfer

Parts and contaminants · 4 min readUltrasonic cleaning of heat exchangers in industryScale, oil, biofilm and deposits on plate packs, tube bundles and coolers cost heat transfer and pumping energy. Which heat exchangers can go into an ultrasonic tank and which cannot, the two-step chemistry for scale and oil, tank sizes for plates and bundles, and the checks before the exchanger goes back into service.

Hydraulics

Parts and contaminants · 4 min readCleaning hydraulic valves and manifold blocks with ultrasoundA hydraulic manifold is a block of intersecting drillings, and every one of them must be free of chips, burr flakes and coolant before oil touches it. The cleaning sequence after deburring, the cleanliness targets, the equipment for new blocks and for repaired valves, and how to keep the clean block clean until it is plugged.

Machining residue

Parts and contaminants · 5 min readRemoving machining swarf, chips and coolantTurned and milled parts carry cutting fluid and fine chips in every pocket, bore, thread and cross-drilling. Ultrasonic cleaning flushes them in one cycle. The bath, what milled parts need in particular, the filtration that makes it last, and the cleanliness checks a machine shop uses.Parts and contaminants · 4 min readCleaning engine blocks after machiningBoring, honing and decking leave chips, abrasive grit and honing oil in bores, galleries and blind holes, and one grain in an oil gallery can wipe a new bearing. How rebuilders and remanufacturers clean a machined block, with the tank sizes and loads that fit car and truck blocks.

Mechanical parts

Parts and contaminants · 4 min readUltrasonic cleaning of bearings and mechanical componentsOld grease, wear particles and dirt out of dismounted bearings, gears and couplings so they can be inspected and reused. Which bearings to clean and which never to wash, the settings, and the steps that stop a clean bearing from rusting or being damaged before it is greased again.

Precision parts

Parts and contaminants · 4 min readUltrasonic cleaning of CNC machined parts before assemblyA machined part that goes into an assembly carries its coolant, chips and burr flakes into the product unless they come off first. What assembly asks of the cleaning step, how to lay out wash, rinse and dry around the machining cell, and how to keep the part clean between the tank and the fitter's bench.

Quality control

Parts and contaminants · 4 min readUltrasonic cleaning of precision parts before quality inspectionA coolant film or a single chip on a datum face is a measuring error, and a part that comes out of a warm bath is not yet the size on the drawing. How to clean precision parts so the inspection measures the part and not its dirt, and how cleaning relates to a technical cleanliness test.

Surface prep

Parts and contaminants · 4 min readCleaning parts before coating or painting with ultrasoundPaint, powder, plating and bonding fail on oil, fingerprints and residue. The cleaning sequence in front of a coating line, how to test that a surface is ready, the contaminants that cause craters and blisters, and how ultrasonic cleaning fits with conversion coatings and pretreatment.

Let's find the right fit

Not sure which size you need?

Send us the part, the quantity per hour and the soil you are removing. We will size the tank and the frequency with you.

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