Capacitor Discharge Stud Welders for Thin Sheet Metal
ZOC Machinery supplies RSR series CD stud welders for fast, low-heat fastening on thin sheet metal. Four models cover stud diameters from Ø3 to Ø12 mm, featuring adjustable charging voltage and a digital voltage display for electrical cabinets, stainless steel products, appliances, and industrial sheet metal fabrication.
What is a Capacitor Discharge (CD) Stud Welder?
A capacitor discharge stud welder uses energy stored in capacitors to attach metal studs to sheet metal through a short electrical discharge. This low-heat welding process is ideal for many thin sheet metal applications where minimal distortion and backside marking are important.
ZOC Machinery’s RSR series CD stud welding machines feature adjustable charging voltage, digital voltage display, and built-in protection functions. Four models cover stud diameters from Ø3 to Ø12 mm, supporting different sheet metal fastening and production requirements.
0.5–3 mm
Typical Sheet Thickness
Designed for thin sheet metal applications where controlled heat input helps minimize distortion and backside marking.
Ø3-12 mm
Stud Welding Range
Four RSR models cover different stud diameters for various sheet metal fastening requirements.
No Ferrules or Gas
Lower Consumable Requirements
Typical CD stud welding requires no ceramic ferrules or external shielding gas, helping simplify operation and reduce consumable costs.
Ideal Applications: Electrical Cabinets • Stainless Steel Equipment • HVAC Components • Household Appliances
RSR SERIES
Capacitor Discharge Stud Welding Machines
Compare four RSR series CD stud welders by welding diameter, capacitor capacity and machine weight. From Ø3-6 mm to Ø3-12 mm stud ranges, each model offers different capabilities for sheet metal fastening and industrial production requirements.
Compact CD stud welder for Ø3-6 mm studs, with 66,000 µF capacitor capacity and a 14 kg machine weight.
CD stud welding machine for Ø3-8 mm studs, featuring 99,000 µF capacitor capacity and a 15 kg machine weight.
CD stud welder for Ø3-10 mm studs, with 132,000 µF capacitor capacity and a 17 kg machine weight.
Higher-capacity CD stud welder for Ø3-12 mm studs, featuring 198,000 µF capacitor capacity and a 30 kg machine weight.
RSR SERIES
CD Stud Welder Specifications & Model Comparison
Compare RSR series capacitor discharge stud welding machines by stud diameter, capacitor capacity, power, voltage, dimensions and weight. Review the specifications of all four models to identify a suitable CD stud welder for your sheet metal fastening requirements.
RSR Series Model Comparison
| Specification | RSR-1600 | RSR-2000 | RSR-2500 | RSR-3150 |
|---|---|---|---|---|
| Welding Diameter | Ø3-6 mm | Ø3-8 mm | Ø3-10 mm | Ø3-12 mm |
| Capacitor Capacity | 66,000 µF | 99,000 µF | 132,000 µF | 198,000 µF |
| Welding Power | 400 W | 500 W | 500 W | 600 W |
| Dimensions (L × W × H) | 450 × 240 × 260 mm | 480 × 240 × 260 mm | 480 × 240 × 260 mm | 580 × 260 × 330 mm |
| Machine Weight | 14 kg | 15 kg | 17 kg | 30 kg |
Common Technical Specifications
| Specification | Value |
|---|---|
| Input Voltage | AC 110/220 V |
| Output Voltage | DC 25–200 V |
| Input Frequency | 50–60 Hz |
| Welding Rate | 10–30 welds/min |
| Cooling Method | Air Cooling |
| Protection Rating | IP23 |
| Maximum Stud Length | ≤50 mm |
Note: Specifications are based on the RSR series product datasheet. Please confirm the required model configuration and application requirements before ordering.
Need Help Choosing the Right RSR CD Stud Welder?
Tell us your stud diameter, workpiece material, sheet thickness, and power supply requirements. Our team can help you identify a suitable RSR model and confirm the required configuration.
How to Choose the Right Capacitor Discharge Stud Welder
Choosing the right CD stud welder depends on your stud diameter, sheet thickness, workpiece material, production requirements and available power supply. Use the following guide to compare your application needs with the capabilities of the ZOC RSR series and identify a suitable model.
Stud Diameter
Match the stud diameter to the appropriate RSR model. The series covers Ø3–Ø6 mm with the RSR-1600, Ø3–Ø8 mm with the RSR-2000, Ø3–Ø10 mm with the RSR-2500, and Ø3–Ø12 mm with the RSR-3150.
Sheet Thickness & Material
Consider the base material, sheet thickness and required weld quality. The RSR series is intended for typical 0.5–3 mm sheet metal applications, but suitability depends on the stud size, material combination and welding conditions.
Production Requirements
Consider your daily welding volume and required production pace. The RSR datasheet lists a reference welding rate of 10–30 welds per minute. Actual output depends on the stud specification, charging cycle and operating conditions.
Power Supply & Accessories
Check the available input voltage at your facility and confirm the required welding gun, stud chuck and cables. The RSR datasheet lists AC 110/220 V input options; verify the required configuration before ordering.
Not Sure Which RSR Model You Need?
Share your stud size, sheet thickness, workpiece material and power supply requirements. Our team can help you identify a suitable CD stud welder for your application.
Why Choose ZOC RSR Series CD Stud Welders?
The ZOC RSR series capacitor discharge stud welding machines combine inverter-based charging, electrolytic capacitor energy storage, adjustable charging voltage and built-in self-check and protection functions. These features help operators configure the equipment for suitable stud welding applications and monitor key settings during operation.
Inverter-Based Charging Power Supply
The RSR series uses an inverter-based power supply to charge the capacitor bank, forming the charging stage of the capacitor discharge stud welding system.
Electrolytic Capacitor Energy Storage
Capacitor capacity ranges from 66,000 to 198,000 µF across the four RSR models, providing different energy storage configurations for various stud diameters and welding applications.
Adjustable Charging Voltage
Stepless charging voltage adjustment allows operators to set the charging voltage according to the selected application and appropriate welding parameters.
Digital Voltage Display
The digital voltage display makes the selected voltage easier to read during setup and operation, helping operators check the machine's voltage setting.
Built-in Self-Check & Protection
Built-in self-check and protection functions are included in the RSR series design. Refer to the equipment manual for detailed functions, operating procedures and protection instructions.
Air Cooling & IP23 Protection
The RSR series uses air cooling and has an IP23 protection rating according to the product datasheet. Check the installation environment and applicable operating requirements before use.
Common CD Stud Welding Problems and ZOC Solutions
When using CD stud welders for thin sheet metal fastening, common concerns include backside marks, inconsistent weld quality and equipment compatibility. The following guide outlines practical considerations and how the ZOC RSR series features can help address these challenges in suitable applications.
Problem: Backside Marks and Sheet Distortion
Excessive heat input or unsuitable welding settings can leave visible marks or distort thin sheet metal, increasing finishing and rework requirements.
Solution: Controlled Heat Input with CD Stud Welding
The short capacitor discharge helps limit heat input in suitable applications. Adjust the charging voltage to the stud and material combination, then verify backside appearance and weld quality through test welds.
Problem: Inconsistent Weld Quality in Repeated Production
Variations in welding settings, stud fit-up, surface condition or charging cycles may lead to inconsistent weld results and additional inspection or rework.
Solution: Adjustable Settings for Repeatable Welding
The RSR series provides adjustable charging voltage and a digital voltage display. Establish suitable welding settings, maintain consistent workpiece preparation and inspect test welds before routine production.
Problem: Incorrect Machine or Accessory Selection
A mismatch between stud diameter, material, welding gun or stud chuck can complicate setup and may result in unsatisfactory welds or unnecessary purchasing costs.
Solution: Model and Accessory Matching Support
Share your stud diameter, workpiece material, sheet thickness, required stud length and input voltage with ZOC Machinery. Our team can help identify a suitable RSR model and compatible stud welding accessories.
Typical Applications of CD Stud Welding Machines
CD stud welding is suited to thin sheet metal applications that require fast fastening with controlled heat input. The RSR series can be considered for the following production environments, depending on stud design, base material and sheet thickness.
Electrical Enclosures & Control Cabinets
Attach grounding studs, mounting points and internal fasteners to control cabinets, switchgear, distribution boxes and server enclosures, where a clean exterior finish is important.
Commercial Kitchenware & Food Equipment
For stainless steel worktables, refrigerators, food-service equipment and appliance panels, CD stud welding offers a fast fastening option while helping limit visible marks on the opposite side of thin sheet metal.
Automotive Sheet Metal & Trim Components
Suitable for attaching small-diameter mounting studs to selected automotive sheet metal parts, trim clips, brackets and interior components. Confirm the base material, coating and stud design before production.
Elevator Panels & Architectural Decoration
For stainless steel elevator interiors, decorative panels, ceilings and metal facades, CD stud welding can support concealed fastening where the visible surface finish is a priority.
CD Stud Welding System & Compatible Accessories
A capacitor discharge stud welding system requires compatible equipment and accessories for reliable operation. ZOC Machinery supplies RSR series CD stud welders, welding guns, stud chucks, cables and CD weld studs to support different sheet metal fastening requirements.
The RSR-3150 capacitor discharge stud welder supports Ø3–Ø12 mm studs and features 198,000 µF capacitor capacity with adjustable charging voltage for various sheet metal fastening applications.
The YF-CD-10 stud welding gun is designed for capacitor discharge stud welding applications. Confirm gun compatibility, stud diameter and the required connection configuration before ordering.
Explore stud welding chucks, collets, welding cables and other accessories for CD stud welding equipment. Choose compatible components based on your welding gun, stud size and application.
Explore CD weld studs for capacitor discharge welding applications. Available options include different thread sizes, materials and lengths for sheet metal fastening and industrial production requirements.
Need a Compatible CD Stud Welding Setup?
Tell us your RSR model, stud diameter, workpiece material and required accessories. We can help you confirm a suitable welding configuration for your application.
CD Stud Welder Demonstration & Bend Test
Watch the RSR-2500 capacitor discharge stud welder attach three threaded CD studs to thin sheet metal, followed by a manual bend test to observe the welded connections and material response.
RSR-2500 Welding Demonstration & Bend Test
- Stud Positioning:
Positioning threaded CD studs on the metal sheet before welding. - Welding Demonstration:
Welding three CD studs using the RSR-2500 stud welding machine. - Manual Bend Test:
Bending the welded sheet to observe the stud connections and material response.
CD Stud Welder FAQs
Find answers to common questions about ZOC RSR series CD stud welders, also known as capacitive discharge stud welders. Explore welding capacity, material compatibility, power requirements, accessories and pricing to help you choose the right equipment for your application.
CD stud welders provide fast, low-heat fastening for thin sheet metal. Their short welding discharge helps minimize distortion and backside marking in suitable applications, making them useful for electrical cabinets, stainless steel products and sheet metal fabrication.
Choose according to stud diameter, sheet thickness, material and production requirements. The RSR-1600 supports Ø3–Ø6 mm studs, RSR-2000 supports Ø3–Ø8 mm, RSR-2500 supports Ø3–Ø10 mm, and RSR-3150 supports Ø3–Ø12 mm.
Common materials include mild steel, stainless steel, aluminum and copper, depending on the stud design, base material and welding conditions. Material compatibility should be confirmed through suitable welding tests before production.
CD stud welding is used for thin sheet metal applications, and the RSR series brochure describes a typical sheet thickness range of 0.5–3 mm. Actual suitability depends on stud diameter, material and welding parameters. Sample testing is recommended for very thin sheets.
Conventional ignition-tip CD stud welding generally requires neither ceramic ferrules nor external shielding gas. This simplifies the welding process and reduces auxiliary consumable requirements compared with welding methods that use them.
Learn How CD Stud Welding Works
The RSR series datasheet lists AC 110 V and 220 V input options with a 50–60 Hz supply frequency. Please confirm your local power supply requirements and the available machine configuration before ordering.
CD stud welding equipment may require a compatible welding gun, stud chucks, welding cables and grounding accessories. Standard and optional accessories depend on the selected model and quotation. Contact ZOC Machinery to confirm the complete configuration.
Capacitor discharge stud welder prices depend on the RSR model, welding capacity, gun configuration, accessories and order quantity. Contact ZOC Machinery with your stud specifications and application requirements to receive a detailed quotation.
Request a Quote for Your CD Stud Welder
Tell us your stud diameter, sheet thickness, base material, input voltage and order quantity. ZOC Machinery will recommend a suitable RSR series capacitor discharge stud welding machine and provide a detailed quotation covering machine configuration, compatible accessories and shipping options.
We typically respond within 12–24 hours with model selection advice and quotation details.
