S-WS
S-WS Lead-Free Dual Wave Soldering Machine (S-WS250 / S-WS350B / S-WS450)
S-WS lead-free dual wave soldering for THT: S-WS250, S-WS350B, S-WS450, boards up to 450 mm, ±1–2 °C solder pot, spray fluxer. Same-day quote.
Stable lead-free soldering for every THT board you build.
The S-WS series covers board widths from 250 to 450 mm with spray fluxing, multi-zone preheating and a dual-wave lead-free solder pot held to ±1–2 °C. One supplier for insertion and soldering, one line plan.
Model, preheat length and options (nitrogen, titanium fingers) are matched to your boards and throughput.
At a glance
- 250–450 mm — PCB width across the series
- ±1–2 °C — solder pot temperature control
- 2 waves — turbulent + laminar, lead-free
- 450 mm — max PCB width (S-WS450)
- 10–100 — ml/min programmable flux flow
Where THT quality is won or lost
Most THT defects show up at soldering. These are the problems buyers bring to us.
- Bridges and blowholes: Unstable wave height and temperature cause bridging, voids and rework.
- Too much flux, or too little: Foam or manual fluxing wastes flux and leaves residue or dry joints.
- Hand soldering bottleneck: Selective hand soldering after the wave slows the whole line.
- Dross and solder cost: Poor pot design oxidises solder and raises consumable cost.
- Boards warp or drop: Weak fingers and conveyors bend boards or drop them into the pot.
- No partner for the full line: Insertion and soldering bought from different suppliers rarely fit together.
What makes the S-WS series a stable process — Feature, Advantage, Benefit
Six features across the series and what they mean for your yield.
Dual wave: Lead-free dual wave pot
Turbulent + laminar waves.
- Feature: Two waves (turbulent and laminar), lead-free pot with PID + SSR control, room temperature to 300–350 °C, ±1–2 °C.
- Advantage: Full hole fill on THT leads while clearing bridges.
- Benefit: Higher first-pass yield and less touch-up.
Key points: 2 waves · ±1–2 °C · Lead-free
Flux: Programmable spray fluxer
10–100 ml/min.
- Feature: Reciprocating spray fluxer (ST-6 or Meiji A-100 nozzle) with flux flow adjustable from 10 to 100 ml/min.
- Advantage: Even, thin flux coverage only where the board needs it.
- Benefit: Lower flux cost and cleaner boards.
Key points: Spray fluxer · 10–100 ml/min · Auto flux supply
Preheat: Multi-zone preheating
600 to 2000 mm.
- Feature: From 2 zones / 600 mm (S-WS250) to 4 zones / 1800–2000 mm (S-WS450), hot air or IR, up to 250 °C.
- Advantage: Flux activates fully and boards reach the wave at the right temperature.
- Benefit: Fewer voids and less thermal shock on components.
Key points: 2–4 zones · 600–2000 mm · ≤250 °C
Conveyor: Titanium-finger conveyor
Angle 3–7°.
- Feature: Double-strengthened fingers (titanium option), conveyor angle 3–7°, speed up to 1800–2000 mm/min.
- Advantage: Boards are held firmly through the wave without warping.
- Benefit: No dropped boards and consistent contact time.
Key points: Titanium fingers · 3–7° angle · ≤2000 mm/min
Control: PLC + touch screen or PC
Recipes and monitoring.
- Feature: PLC with touch screen (S-WS250, S-WS350B) or PLC + PC control (S-WS450).
- Advantage: Temperature, speed and flux settings are stored per product.
- Benefit: Repeatable results across shifts and products.
Key points: PLC · Touch screen / PC · Recipe storage
Line: Fits your THT line
After insertion, before unloading.
- Feature: Works after S3000/S3010A, S7020T and S7900 insertion and before the SUL unloader; nitrogen and titanium options available.
- Advantage: One supplier plans insertion, soldering and handling together.
- Benefit: Faster line start-up and one point of support.
Key points: THT line ready · Nitrogen option · Unloader ready
Key specifications for project evaluation
Values support initial evaluation and remain subject to final technical confirmation against your board size, component mix and line layout.
Series overview
| Parameter | S-WS250 / S-WS350B / S-WS450 |
|---|---|
| PCB width | 50–250 mm / 50–350 mm / 50–450 mm |
| Waves | 2 / 2 / 2 |
| Preheat | 2 zones, 600 mm, 3 kW / 3 zones, 1800 mm, 15 kW / 4 zones, 1800–2000 mm |
| Solder pot | 6 kW, ≈200 kg / 9 kW, ≈320 kg / 12 kW, ≈450 kg |
| Pot temperature | to 300 °C / to 300 °C / to 350 °C, ±1–2 °C |
| Conveyor speed | 0–1.8 m/min / 300–1800 mm/min / 0–2000 mm/min |
| Control | PLC + touch screen / Siemens PLC + touch screen / PLC + PC |
Machine
| Parameter | S-WS250 / S-WS350B / S-WS450 |
|---|---|
| Dimensions (L×W×H) | 2100×1200×1400 mm / 3500×1400×1650 mm / 4500×1400×1650 mm |
| Weight | ≈400 kg / — / ≈1500 kg |
| Power supply | 3-phase 380 V (415 V possible on S-WS350B); S-WS450: 3P5W 380/220 V |
| Running power | ≈1.5 kW / ≈2.5 kW / ≈3–5 kW (10 kW operation rating on S-WS450A) |
| Component height | ≤100 mm (S-WS250) / ≤150 mm (S-WS450C) |
| Conveyor angle | 3–7° adjustable |
| Air | 4–7 kg/cm² |
Values from the S-WS250, S-WS350B, S-WS450A and S-WS450C product pages and manuals. Variants differ in preheat length and heating method (hot air or IR); S-WS350B weight is confirmed with the quotation. Nitrogen (S-SW450) and titanium fingers are options.
Compatibility and interfaces: Lead-free, Tin-lead, Dual wave, Spray fluxer, Hot air / IR preheat, Titanium fingers, Nitrogen option, SMEMA
S-WS machines and key parts
See a complete THT line with wave soldering
Interactive 3D demo
Open the interactive S-WS series explainer with its 3D machine viewer (opens in a new tab).
From sample review to lifetime support
- 1 · Free application review — Send PCB files, BOM and component samples. An engineer checks fit before any quotation.
- 2 · Live demo with your parts — We run your own components on the machine and share the video and an ROI estimate.
- 3 · Configuration & quote — Feeders, tooling and line interfaces are matched to your board; quote the same working day.
- 4 · Installation & training — Engineer-guided startup, programming and operator training, on site or remote.
- 5 · Lifetime support — Remote diagnosis, spare parts from Shenzhen and a fix plan within 3 days.
Frequently asked questions
Which model do we need?
Choose by maximum board width: S-WS250 up to 250 mm, S-WS350B up to 350 mm, S-WS450 up to 450 mm. Output target and component height also matter.
Is it lead-free?
Yes. All models run lead-free solder; tin-lead is also possible.
Can you supply nitrogen or titanium fingers?
Yes. A nitrogen version (S-SW450) and titanium finger conveyors are available.
What utilities are required?
3-phase 380 V power, 4–7 kg/cm² compressed air and an exhaust connection. Running power is about 1.5–5 kW depending on model.
How fast do we get a quote?
Send your PCB size, BOM or component list, target output per shift and destination country. We reply within 2 hours in working time and quote the same day; a free live demo with your own components can be arranged before you order.
What about installation, training and spare parts?
Installation and operator training are included in the project plan (on site or remote). Spare parts ship from Shenzhen, and our engineers give a remote diagnosis and fix plan within 3 days.
Engineering Review
Send PCB details for a practical machine recommendation.
Useful details: PCB type, board size, component list, monthly volume, current worker count, line layout and target automation goal.
Next step: Send board width, component height, solder type and target output. We match the S-WS model and quote the same day.
Engineering Review
Send PCB details for a practical machine recommendation.
Useful details: PCB type, board size, component list, monthly volume, current worker count, line layout and target automation goal.
Send board width, component height, solder type and target output. We match the S-WS model and quote the same day.