S-100A Ultrasonic Cleaner: Cavitation Cleaning for SMT Nozzles, Squeegees and Fixtures

A nozzle comes off the placement head at changeover, gets wiped with a lint cloth, and goes straight back on. Two hours later the pickup-error log fills with missed 0402s, and the cause is flux baked inside the nozzle bore that no cloth reaches. Solder pallets and wave-solder fingers carry the same soil at larger scale. The S-100A cleans by cavitation in a 30-liter SUS304 tank — 40,000 Hz, 600 W across ten elements — reaching blind holes and apertures that hand tools never touch.

The cost you haven't named

Hand cleaning cannot reach the soil. Paste packs the inside of a nozzle bore and the thread of a wave-finger clamp. A cloth cleans what it can see, so the residue that causes the failure survives the wipe.
Consistency depends on who is cleaning. One operator wipes for ten seconds, another for a minute. The result varies by shift, so pickup rates and print quality move for reasons nobody has written down.
Abrasive scrubbing damages the surface it is meant to save. Brushes and picks round squeegee edges, scratch nozzle tips and open stencil aperture walls. The damage shows up later as print definition loss.
Labour is booked to a step that adds no product value. Replacing manual brush cleaning with a timed bath cycle frees one to two operators per shift — treat that as a planning benchmark for your own volumes, not a promised result.
Chemistry is wasted without heat control. Cold solution and no temperature regulation mean longer cycles, more concentrate, and a bath that degrades before it is used up.

The Four-Point Cavitation Cleaning Audit

Buying a tank is easy; specifying the cycle is the work. Run this audit on the parts you actually clean and the specification writes itself.

1. Sort parts by soil and geometry. Group the load into flux-bearing metal parts (nozzles, pump bodies, wave fingers, pallets), paste-bearing items (squeegee blades, holders, stencil frames) and general fixtures. Flux and paste respond to different chemistry and cycle lengths, so one basket for both means one soil is over-cleaned while the other is left behind.

2. Size the load to the working volume. Cavitation needs liquid contact on every surface. Parts sit in a basket with a gap between them, never nested or stacked. A 30 L tank with a 500 × 300 × 200 mm working volume sets the real limit per cycle, not the number of parts you can drop in.

3. Set time, temperature and chemistry as one decision. Heated solution removes flux faster than a cold bath, and the 1–99 minute digital timer makes the cycle repeatable across operators. Pick water-based saponifier, IPA or a commercial concentrate with the soil in mind, and keep flammable solvents out of a heated bath unless your safety review allows it.

4. Place the station where the dirty work already happens. A cleaner at the far end of the building is a cleaner nobody uses. Put it beside the nozzle maintenance bench, the stencil store or the wave-solder tear-down area, and add a rinse and dry step — cleaning is a cycle, not a soak.

The vehicle: S-100A Ultrasonic Cleaner

The S-100A is a parts bath, and that distinction matters. Our stencil cleaners (S-1688, SME210/220, SMM-1100) wash stencils and misprint boards by spray or roll; the SME5600 and SME6200 are inline PCBA washers that carry assemblies through wash, rinse and dry. The S-100A does neither. It is the 30-liter bath you put small parts into — nozzles, squeegee hardware, pallets, fixtures and loose components — cleaned by cavitation rather than solvent spray or hand scrubbing.

Sort parts by soil and geometry → 30 L SUS304 tank and basket. Tank and cleaning basket are both SUS304 stainless steel, so caustic saponifiers and IPA are compatible with the wetted surfaces, and parts stay separated in the basket instead of piled in a solvent tray.
Size the load to the working volume → 500 × 300 × 200 mm tank. That volume takes a full set of pallets or several nozzle trays per cycle with liquid around every part, which is what makes the result repeatable.
Set time, temperature and chemistry → 600 W across ten elements with digital heat and a 1–99 minute timer. Ten transducers spread cavitation instead of concentrating it under one spot, and digital heating holds the solution at temperature so cycle time does not drift with the season.
Place the station in the workflow → 530 × 330 × 330 mm body, drain valve, 220–240 V supply. At roughly 18.5 kg the unit fits on a bench beside the maintenance area, and the built-in drain means a bath change is a valve, not a lift.

Specification note: basket configuration, cycle time, working temperature, cleaning chemistry and the regional power variant should be confirmed at quotation, because they depend on the soils you remove, your part mix and local supply standards.

Specifications

| Parameter | Value |

| --- | --- |

| Model | S-100A |

| Ultrasonic frequency | 40,000 Hz |

| Ultrasonic power | 600 W (10 elements) |

| Tank capacity | 30 L |

| Tank material | SUS304 stainless steel (tank and basket) |

| Timer | 1–99 minutes, digital |

| Heating | Digital precision-controlled |

| Power supply | AC 220–240 V, 50/60 Hz |

| Product size | 530 × 330 × 330 mm |

| Internal tank size | 500 × 300 × 200 mm |

| Drain | Fitted |

| Weight | Approx. 18.5 kg |

The loop: re-audit the cycle every month

Chemistry ages, soils change with paste and flux suppliers, and a cycle tuned in January does not behave the same way in July. Build a loop: every month, pull one cleaned nozzle and one pallet from a normal cycle, inspect them under the microscope used for placement checks, and compare against your commissioning baseline. Log bath changes and cycle count so a declining result is traced to tired chemistry rather than to the machine. When a new paste or flux is approved, re-run the Four-Point Cavitation Cleaning Audit before volume builds. That loop keeps cleaning a controlled process instead of a habit.

Your next step

Send us the parts you clean today, the soils involved (flux, paste, oil, dust) and your current cycle time per batch. We will return a cleaning review showing basket loading for your part mix, which chemistry and temperature window to specify, and what to confirm at quotation. Reach Jason at jasonwu@smthelp.com or on WhatsApp +86 13602562576.

FAQ

What can I clean in the S-100A?

PCBs, stencil frames, nozzle assemblies, solder pallets, wave fingers, fixtures and loose precision components — anything that fits the 500 × 300 × 200 mm basket and tolerates immersion.

Why 40,000 Hz for SMT parts?

40 kHz lifts baked flux and dried paste from metal surfaces and is a well-proven frequency for stainless and plated parts. Assemblies with wire bonds or open cavities should be qualified on a sample first.

What cleaning solutions can I use?

Water-based saponifiers, IPA and most commercial ultrasonic concentrates are compatible with the SUS304 tank. Flammable solvents need your own process safety review before use in a heated bath.

How long is a typical cycle?

Three to fifteen minutes depending on soil and temperature, with the digital timer supporting 1–99 minutes for set-and-forget operation.

How is the bath maintained day to day?

Skim surface debris, change the bath when the solution turns cloudy or the result degrades, drain through the fitted valve, and wipe the tank dry between fills.

Jason Wu

Founder & CEO, Southern Machinery (Shenzhen Southern Machinery Sales And Service Co., Ltd.)

Email: jasonwu@smthelp.com / info@smthelp.com

WhatsApp: +86 13602562576

Catalog & manuals: file.autoinsertion.com | Machine photos: ph.smthelp.com

LinkedIn: linkedin.com/in/smtsupplier | YouTube: youtube.com/c/Smthelping