Capacitor Discharge (CD) Stud Welder - CDMi 2402

The CDMi 2402 is a high-capacity inverter-capacitor Capacitor Discharge (CD) stud welder engineered for automated production and precision fastening on thin sheet metal from 0.02” (0.5 mm) thick. Delivering up to 2,400 Ws of welding energy with stepless voltage control from 50–220 V, it welds mild steel, stainless steel, aluminum, and brass studs from M3 to M8 while supporting production speeds of up to 40 studs per minute. The CDMi 2402 combines fast charging, precise energy control, and automation-ready features for demanding industrial manufacturing applications. Available from Sunbelt Stud Welding, Houston, TX, for customers throughout the United States.

Description

Application

Especially suitable for thin sheets (at least 0.5 mm)

Features

Microcontroller
Function monitoring
Display of error codes
Library function
Process monitoring
RS-232 interface

Safety

Integrated mains filter (protection against voltage peaks)
Optimal for construction sites with large mains voltage fluctuations
EMC test
High-voltage test with log
Retriggering lock
Thermal monitoring of transformer and internal temperature of stud welding unit
Temperature-regulated ventilator
Control unit galvanically separated from welding lines
Optimal protection against external interferences

Mild steel

Stainless steel

Aluminium

Brass

M3 to M8 (M10) - #4 to 5/16" (7/16")

GENERAL INFORMATION
Application Especially suitable for thin sheets (at least 0.5 mm) All-rounder for automation Extensive library function Change over of capacitors for optimal energy input M3 to M8 (M10) #4 to 5/16" (7/16")

TECHNICAL SPECIFICATIONS
Welding Process	CD
Welding Material	Mild steel, stainless steel, aluminum and brass
Technology	Inverter-Capacitor Charging Technology
Equipment	Automation
Display	LCD
Welding Range	M3 to M8 (M10 limited), dia. 2 to 8 mm (dia. 10 mm limited) #4 to 5/16" (7/16" limited), dia. 14 ga to 5/16" (dia. 3/8" limited)
Welding Rate	M3 / #4=40 studs/min. (voltage 60 V) M8 / 5/16"=21 studs/min. (voltage 170 V) M10 / 7/16"=17 studs/min. (voltage 210 V)
Capacitance	99 000 μF/33 000 μF with change over of capacitors
Welding time	1 to 3 ms
Energy	2,400 Ws / 800 Ws with change over of capacitors
Charging voltage	50 to 220 V (stepless voltage regulation)
Primary power	230 V, 50/60 Hz, 10 AT (slow blow) alternative primary power see Order Number
Connected load	1000 VA
Power source	Capacitor
Cooling type	F (temperature controlled cooling fan)
IP code	IP 21
Dimension L x W x H (without handle)	22.44" x 11.22" x 11.42" (570 x 285 x 290 mm)
Weight	57.32 lbs / (26 kg)
Suitable guns / heads	See below
Order number	92-12-22412B (115 V) 92-10-22412B (230 V)

WHERE THE CDMi 2402 FITS
USE CASE	WHY THE CDMi 2402
High-energy CD stud welding	Dual-energy capacitor system delivers 800 Ws or 2,400 Ws for broader application flexibility.
Multi-material production	Welds mild steel, stainless steel, aluminum, and brass using one welding platform.
Automated manufacturing	Process monitoring, LCD controls, and RS-232 communication simplify production integration.
High-cycle production lines	Welds up to 40 studs/min while maintaining stable charging performance.
Variable stud diameters	Stepless 50–220 V charging adapts welding energy to different stud sizes.
Thin sheet metal fabrication	Low heat input minimizes backside marking on materials from 0.5 mm thick.

FAQs

The CDMi 2402 is designed for high-speed Capacitor Discharge stud welding on thin sheet metal, making it suitable for electrical enclosures, HVAC equipment, automotive components, appliances, and OEM manufacturing.

Yes. The CDMi 2402 supports CD stud welding on mild steel, stainless steel, aluminum, and brass, depending on the welding application and compatible studs.

The CDMi 2402 uses inverter-capacitor charging technology to recharge capacitors more efficiently, reducing energy consumption while supporting faster production cycles and consistent welding performance.

Yes. The CDMi 2402 is automation-ready and includes process monitoring, an LCD interface, and RS-232 communication for integration into automated stud welding systems.

The CDMi 2402 can weld up to 40 studs per minute on M3 studs, with production speeds varying based on stud diameter, charging voltage, and application.

Choose the CDMi 2402 for thin sheet metal, minimal backside marking, and high-speed production. Arc stud welders are generally better suited for thicker materials and heavy structural applications.