Versatile Industrial Resistance Welding Solutions
WPI Taiwan’s Pneumatic Spot Welding Machine series provides a dependable and cost-effective solution for diverse metal fabrication and assembly needs. This line features two distinct configurations to suit different production requirements: the S Series for general-purpose spot welding, and the SP Series specifically reinforced for thick plate and projection welding.
To meet global manufacturing standards, we offer a complete range of power technology options, including AC, DC, AC Inverter, and DC Inverter systems. Whether you require traditional reliability or modern energy-efficient precision, WPI Taiwan provides the ideal power configuration for your specific factory workflow.
Features
- Dual-Series Industrial Design:
-. S Series: The workhorse solution for general industrial applications, widely used for reliable sheet metal assembly and resistance spot welding across various manufacturing industries.-. SP Series: Specifically engineered with a reinforced frame structure for thick plate welding and high-pressure projection welding applications, delivering enhanced rigidity and welding performance.
- Customizable Power Systems: Available in multiple power configurations to meet different welding requirements:
-. Standard AC / DC: Proven and reliable power solutions suitable for general industrial resistance welding applications.-. AC Inverter / DC Inverter: Advanced inverter technology provides superior energy efficiency, precise welding current control, and optimized heat distribution for improved weld consistency.(Please contact WPI Taiwan to discuss the most suitable power source for your specific welding application.)
- Flexible Controller Options: Choose the control system that best fits your welding process:
-. Analog Control: Simple, reliable, and easy-to-operate control system for standard welding applications.-. Microcomputer Control: Provides multi-program and multi-stage welding parameter settings for complex welding processes and precise quality contro.
- High-Rigidity Steel Frame: Built with a robust steel frame structure to withstand continuous industrial operation, providing excellent mechanical stability and consistent electrode force for reliable welding quality.
- Optimized Projection Capability (SP Series): The SP Series is designed for demanding projection welding applications, including nut and bolt welding, where concentrated electrode force and controlled heat input are required to achieve strong and consistent weld joint.
Specifications
| S - TYPE _ Spot | SP - TYPE _ Spot & Projection | |||||
|---|---|---|---|---|---|---|
| Model | SA-354S | SA-504S | SA-604S | SA-804SP | SA-1004SP | SA-1204SP |
| Rated capacity KVA | 35 | 50 | 60 | 80 | 100 | 120 |
| Max. Short current A | 15000 | 18000 | 20000 | 28000 | 35000 | 38000 |
| Throat Spec. mm, H x L | 200 x 400 | 200 x 400 | 200 x 400 | 200 x 400 | 200 x 400 | 200 x 400 |
| Electrode Force KG | 350 | 500 | 500 | 800 | 800 | 1000 |
| Electrode Stroke | 70 | 70 | 70 | 70 | 70 | 80 |
| Cooling Water L/min | 5 | 6 | 6 | 8 | 10 | 10 |
| Electrode mm | Ø16 | Ø16 | Ø16 | Ø16 | Ø16 | Ø16 |
| Electrode Holder-mm | Ø25 | Ø25 | Ø25 | Ø32 | Ø32 | Ø32 |
Applications
- S Series (General Assembly): Extensively used for general sheet metal fabrication, steel furniture assembly, cabinet manufacturing, and hardware production, providing stable and efficient resistance spot welding performance.
- SP Series (Heavy-Duty & Projection): Designed for demanding applications such as nut and bolt welding, thick plate structural joints, automotive components, and heavy-duty industrial hardware, delivering higher electrode force and reliable projection welding performance.
- Wide Material Compatibility: Suitable for reliable resistance welding of mild steel, low-carbon steel, stainless steel, and various alloy steel materials, meeting the welding requirements of different industrial applications.
The Pneumatic Spot Welding Machine series is a reliable solution widely used across various industrial manufacturing sectors:



