PRECISION FASTENER
WASHING SYSTEMS
Automated parts washing solutions engineered specifically for aerospace fasteners, aviation hardware, and high-precision threaded components. From small batch ultrasonic to fully automated inline Roboclean conveyor systems.
System Capabilities
Automated Batch Washing
Fully automated cycle control handles large volumes of fasteners — bolts, screws, rivets, and specialty hardware — with zero manual intervention per batch.
High-Pressure Spray Impingement
Precision spray nozzles deliver targeted impingement cleaning to threaded surfaces, hex heads, and recessed features that ultrasonic alone may not reach.
Passivation Ready
Integrated Incoloy heating elements and acid-resistant wetted parts make our systems ready for nitric acid, citric acid, and mixed acid passivation of stainless and titanium fasteners.
Roboclean Multi Wash Integration
The Roboclean Multi Wash system is purpose-built for high-throughput automated fastener cleaning — continuous conveyor feed, multi-stage wash/rinse/dry in a single inline unit.
Aerospace & Aviation Grade
Meets the rigorous cleanliness standards required for aerospace-grade fastener processing — MIL-spec, AS9100, and customer-specific cleanliness protocols supported.
Ultrasonic + Spray Combination
Combine ultrasonic cavitation cleaning with spray impingement for the deepest clean on complex threaded and blind-hole fastener geometries.
Roboclean Multi Wash
The Roboclean Multi Wash is Aeroklean USA's fully automated inline conveyor parts washing system — ideal for high-volume fastener cleaning in aerospace and industrial production environments. Continuous feed, multi-stage wash, rinse, and dry in a single stainless steel machine.
In Production: The Roboclean Multi Wash operates seamlessly in active aerospace fastener manufacturing lines, handling continuous part flow with minimal operator intervention.
Roboclean Multi Wash — Full Side View
Roboclean Multi Wash — Exit End & Basket Rack
Roboclean Multi Wash — Interior Tanks & Gantry
Roboclean Multi Wash — AEROKLEAN USA Branding
Roboclean Multi Wash — Porthole Window Series
Continuous Conveyor Feed
Load parts at one end, retrieve clean & dry parts at the other
Multi-Stage Process
Wash → Rinse → Dry in a single pass through the machine
304 Stainless Construction
Full stainless steel interior and exterior for industrial longevity
Custom Configurations
Belt width, tank count, drying options, and chemistry built to your spec
How It Works
The Roboclean Multi Wash operates as a fully automated multi-stage pipeline. Watch the sequence below — baskets load continuously from the staging area and advance through each process tank until they exit clean and dry.
Staging / Load
Baskets filled with fasteners are loaded at the staging area. The automated hoist picks up each basket and delivers it to Tank 1 — no manual handling required once loaded.
Tank 1 — Wash
Parts enter the primary wash tank where heated detergent solution (up to 160°F) removes machining oils, cutting fluids, grease, and surface contaminants.
Tank 2 — Rinse 1
A hot-water cascade rinse removes detergent carry-over, ensuring no residual chemistry remains on the fastener surfaces before the next stage.
Tank 3 — Rinse 2
A second clean-water rinse stage guarantees complete detergent removal. This is critical for passivation processes and aerospace cleanliness standards.
Tank 4/5 — Dry
Parts move into the heated blow-off and drying stage. Forced hot air and radiant heat ensure fasteners exit fully dry, ready for inspection, packaging, or installation.
Automated Hoist Transfer System
The overhead hoist trolley travels the full length of the rail — from the staging area all the way to the exit — picking up each basket only after it has completed its full soak dwell time in the current tank. All tanks operate simultaneously: while the hoist transfers one basket forward, every other tank is actively processing its own basket. This keeps the pipeline fully loaded and maximizes throughput with zero idle time.
Optional Add-Ons & Upgrades
The Roboclean platform is modular — each tank can be configured independently with one or more of the following cleaning technologies to match your specific part geometry and cleanliness requirements:
Ultrasonics
Ultrasonic transducers bonded to the tank walls generate millions of microscopic cavitation bubbles per second. This implosion energy scrubs blind holes, threads, and recessed features that spray nozzles and agitation cannot reach — ideal for aerospace-grade cleanliness.
Can be combined with other options ›
Spray Under Immersion
Submerged spray manifolds direct pressurized jets of solution directly at parts while they are fully immersed in the tank. The combined action of hydraulic pressure and full liquid contact provides excellent cleaning on complex geometries without surface damage.
Can be combined with other options ›
Agitation Only
A turbine or pump agitates the solution, creating continuous fluid movement around the parts. Effective for general-purpose cleaning where chemistry alone can do the work — a cost-effective configuration for standard fastener wash and rinse stages.
Can be combined with other options ›
360° Rotation
Rotor baskets spin continuously inside the tank — parts tumble through the solution in a full 360-degree rotation, ensuring every surface, thread, and crevice is exposed to fresh chemistry on every revolution. Ideal for high-volume small fasteners and bulk hardware.
Can be combined with other options ›
Oil Filtration
Continuous overflow weir oil sweep removes floating oils from the tank surface before they can redeposit on clean parts. Oil-laden solution cascades over the internal weir, passes through filter media, and is pumped back clean — extending bath life and reducing change-out intervals.
Can be combined with other options ›
All options can be combined — ultrasonics, spray under immersion, agitation, 360° rotation, and oil filtration can each be applied to individual tanks or across all stages. We configure each system to your exact application.
Oil Sweep Filtration System
State-of-the-art continuous oil removal — engineered to keep your wash bath clean, extend chemical life, and eliminate oil redeposition on parts.
How the Overflow Weir Works
Oils Float to the Surface
Machining oils, cutting fluids, and hydrocarbon contaminants removed from parts are lighter than water — they naturally float to the top of the wash or rinse tank solution.
Overflow Weir Sweeps the Surface
An internal overflow weir wall is positioned just below the solution surface level. Oil-laden surface liquid continuously cascades over the top of the weir and into a separate collection chamber — the "oil sweep" effect means the surface is perpetually skimmed clean.
Oil Filters Capture the Contamination
The overflow from the weir chamber drains down through dedicated oil filter media. The filters trap and coalesce the oil droplets, separating them from the aqueous solution. Captured oils accumulate in the filter for periodic disposal — no manual skimming required.
Clean Solution Recirculated Back
The now oil-free solution is pumped back up from the filter assembly and returned into the main tank — completing a continuous closed-loop recirculation cycle. The tank surface stays clean at all times, even during active washing.
Why It Matters — No Redeposition
Without oil removal, floating oils sit on the tank surface. Every time a basket is lifted out of the tank, parts pass back through the oil layer — redepositing the very contaminants you just washed off. This defeats the purpose of cleaning and can cause part rejection, coating adhesion failures, and passivation defects.
The oil sweep system prevents this entirely. Parts exit through a surface that is continuously swept clean — so the last thing to contact your parts before they reach the rinse stage is clean, oil-free solution.
Extends Tank Bath Life Significantly
By continuously removing oils from the bath, the cleaning chemistry stays concentrated and effective for far longer. Fewer change-outs mean less chemical cost, less waste disposal, and less planned downtime — a direct reduction in total cost of ownership for your washing system.
Continuous Drum Washer
The ultimate high-throughput solution for bulk fastener and small-part cleaning — continuous feed, zero handling, fully automatic wash-rinse-dry in a single rotating drum.
What Is a Drum Washer?
A drum washer — also called a barrel washer or continuous tumble washer — is a long, inclined rotating cylinder with internal helical flights (a corkscrew-shaped auger) running its full length. Parts are loaded through a hopper at the inlet end, and the rotating drum's flights grab and tumble them forward, station by station, through multiple cleaning zones inside the same machine.
Unlike batch washers that stop and start, a drum washer never stops — parts are feeding in at one end while clean parts are falling out the other. This makes them ideal for ammunition shells, small machined fasteners, stampings, rivets, and any high-volume small part that can tolerate tumbling.
Inside the drum, parts are simultaneously submerged in solution, hit with spray nozzles, and tumbled by the helical flights — every surface, thread, and bore is exposed to fresh chemistry continuously. When the drum is long enough, multiple distinct process zones (wash → rinse 1 → rinse 2 → hot-air dry) are all contained in one machine.
How the Helical Flight Works
Parts Load via Hopper
Bulk parts are poured or conveyed into the hopper at the inlet. No baskets, no fixtures — just parts directly into the drum.
Drum Rotates & Flights Advance Parts
The angled corkscrew flights inside the drum pick up parts on each rotation and push them forward — like a screw conveyor — toward the exit end. The drum is also slightly inclined to assist gravity travel.
Spray + Immersion + Tumbling
As parts are advanced, they are tumbled through wash solution, hit by spray manifolds mounted inside the drum, and continuously reoriented — ensuring all surfaces clean simultaneously.
Zone Separation Inside One Drum
Internal weir plates or chamber dividers separate the wash, rinse, and dry zones without stopping part travel — the drum handles multiple chemistries in a single enclosed body.
Parts Exit Clean & Dry
Clean, rinsed, and dried parts tumble out the exit end continuously — ready for inspection, packaging, or immediate use.
Best For
- Ammunition casings & shells
- High-volume bulk fasteners
- Stampings & pressed parts
- Small machined components
- Rivets & clips
Key Advantages
- Zero operator intervention
- Continuous — no batch downtime
- All zones in one machine
- Tumbling ensures 100% surface exposure
- Scalable throughput via drum length & speed
Available Options
- Multiple wash/rinse zone count
- Ultrasonic integration
- Hot-air blowoff drying
- Oil sweep filtration
- Custom flight pitch & drum diameter
Drum Washer Systems — Aeroklean USA
Stainless Steel Drum Washer — Full View
Horizontal Drum Washer — Inlet Hopper & Control Panel
Nuts & Bolts — Drum Washing in Progress
Clean Fasteners — Post-Wash Inspection
Bulk Fasteners Loading via Hopper
Hardware Exit — Dry & Clean
Brass Shell Casings — Drum Cleaning Process
Clean Brass Casings — Exit Inspection
Ammunition & Brass Shell Casing Cleaning
Drum washers are the industry standard for cleaning brass shell casings, cartridge cases, and ammunition components at scale. Whether you're processing 9mm pistol brass, rifle casings, shotgun hulls, or specialty military calibers — the continuous tumbling action of the helical drum ensures every casing is cleaned inside and out, with primer pocket debris, carbon fouling, and case lube fully removed in a single pass.
Fastener Types We Clean
Built for Aviation
Aircraft rely on thousands of fasteners per airframe — every one of them must be clean, passivated, and free of machining oils, chips, and contaminants before installation. Aeroklean USA's precision fastener washing systems deliver the cleanliness levels required by aerospace quality standards.
Ready to Automate Your Fastener Washing?
Tell us your fastener types, production volume, and cleanliness requirements — we'll recommend the right system from our precision parts washer series.