SN7 series IGBT Inverter Drawn Arc Stud Welder
The SN7 series IGBT inverter drawn arc stud welder is a high-performance welding machine designed for use in steel construction, bridge building, and railway projects. It offers precise control with programmable welding time and current settings, allowing for accurate and reliable welds. The machine can achieve a preset time accuracy of 0.01 seconds and a current precision of 1 ampere, making it ideal for demanding industrial applications.
With its compact and lightweight design, the welder is suitable for continuous operation 24/7. It includes anti-misoperation features to prevent repeated welding on the same spot, along with short-circuit and circuit-breaker protections that safeguard the control board. This ensures smooth operation even after troubleshooting, reducing downtime and increasing overall efficiency.

Key Features:
Lightweight, easy to maintain, stable and consistent welding quality, energy-efficient, and environmentally friendly. Ideal for industries such as steel structures, shipbuilding, chemical, construction, metallurgy, automotive, bridges, boilers, and chassis.
Technical Specifications:
Model | Model | SN7-1600 | SN7-1600 | SN7-2500 | SN7-2500 |
Stud Diameter | φ5-16mm | φ6-18mm | φ8-20mm | φ10-25mm | φ10-28mm |
Maximum Welding Current | 1200A | 1600A | 2000A | 2500A | 3150A |
Welding Current Range (Stud) | 100-1200A | 100-1600A | 100-2000A | 100-2500A | 100-2000A |
Welding Current Range (MMA) | 100-1200A | 100-1600A | 100-2000A | 100-2500A | 200-3150A |
Weld Time | 400-3000ms | ||||
Weld Speed | 16pc/M10/min | 16pc/M12/min | 16pc/M18/min | 16pc/φ22/min | 16pc/φ22/min |
Main Circuit | IGBT | ||||
Control Circuit | PIC/DSP | ||||
Repeat Cycle Lock | Automatic Protection | ||||
Power Supply | 3-phase, 380VAC/50Hz or 60Hz (custom voltages available) | ||||
Voltage Fluctuation Range | ±10% | ||||
Cable Specification | 1*8+3*10mm2 | 1*8+3*10mm2 | 1*8+3*10mm2 | 1*8+3*10mm2 | 1*8+3*10mm2 |
Control Cable Specification | 4*1mm2 | ||||
Max. Weld Extension Cable | 100m | ||||
Max. Earth Extension Cable | 20m | ||||
Protection Rating | IP23 | ||||
Dimensions (mm) | 640*420*550 | 640*440*570 | 640*440*570 | 700*440*800 | 700*440*740 |
Weight | 55kg | 60kg | 70kg | 70kg | 98kg |
Multi-Function | Stud Welding / MMA Welding | ||||
Gas Protection | Optional | ||||
Weld Gun | KNQ7B / KNQ9 | ||||
Supply Scope | Welder, Weld Gun, Weld Cable, Earth Lead, Chucks, Ferrule Holders, Spanner, Manual |
Applications:

About Our Company:
CHINA IKING INDUSTRIAL GROUP CO., LTD is a leading manufacturer and exporter of stud welding products, with a dedicated shear stud and bolt & nut factory located in Tianjin. We offer a wide range of high-quality ARC studs, CD studs, and welding machines & guns. Custom manufacturing is also available upon request.
Our products strictly adhere to international and domestic quality standards, including EN ISO 13918, AWS D1.1, JIS B918, and more. Our quality control department ensures that all products meet the highest standards before leaving the factory.
With over 27 years of experience, we now operate 15 production lines and have a monthly output capacity of 4000 tons. Through continuous innovation and strict quality control, we have earned CE, ISO, and SGS certifications, becoming a trusted supplier and long-term partner for our global customers.
We have established long-term trade relationships with over 50 countries, including Russia, the UK, USA, Germany, Poland, Kuwait, Saudi Arabia, Bangladesh, UAE, Vietnam, South Africa, and many others.
Packing Details:
IGBT Inverter Drawn Arc Stud Welder
1. Outer Packing: Sea-worthy plywood cases.
2. Inner Packing: Welders are wrapped in bubble covers and fixed with battens and nails; matching welding guns and accessories are packed on pallets.
3. Packaging Size: Please refer to the specific model's packing dimensions.
4. Container Load: Please check the specific model's packaging size for container loading details.


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