Precision Engineering for Global OEMs

Custom Control Panel services

From rapid prototyping to high-volume production, Supro MFG delivers one-stop precision metal fabrication with ISO-certified quality. Reduce your lead times and production costs with our expert DFM support.

1-3 day Rapid Prototyping & Agile Supply Chain Delivery.
On-time delivery of high quality product commitments.
Extensive Material Selection & Industrial-Grade Finishing.
Direct-from-Factory Pricing & Transparent Costing.
ISO 9001-2015 / IATF 16949:2016 certified system.
Integrated Assembly: Delivering finished, ready-to-use products, not just components.

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Rapid Prototypes, DFM Optimization, On-Time Delivery, Real Manufacturer Quote.

Rapid stamping die Turnaround

Committed to exceeding expectations for quality and rapid turnaround, and meeting high-quality sheet metal parts.

Consistency & high quality

Whether it is rapid prototyping & large-volume manufacturing, we will implement it according to customer needs and standards.

Low Cost Effective

Integrate product design, bending, stamping, cutting, surface treatment, etc. to provide a series of manufacturing solutions.

Precision Metal Fabrication Services in China | Custom OEM Solutions & Rapid Prototyping

Your Strategic Partner for Control Panel Fabrication

At Supro MFG (Supro Manufacturing Co., Ltd.), we don’t just manufacture parts; we engineer reliability. As a leading China metal fabrication factory, we bridge the gap between complex design and cost-effective production. By leveraging our ISO 9001:2015 & IATF 16949 certified facilities and a seasoned engineering team, we provide 3,000+ global clients with unparalleled custom metal fabrication services—direct from the source with transparent, manufacturer-level pricing.

We specialize in the high-quality manufacturing and assembly of custom metal parts, with processing capabilities encompassing: sheet metal fabrication, metal stamping, CNC machining, laser cutting, metal welding, metal spinning, deep drawing, aluminum extrusion, die casting, as well as customized finished product assembly and surface treatment services.

From concept prototypes to mass production,

Supro MFG is your most reliable partner and you will benefit from our manufacturing services.

What is a Control Panel?

A Control Panel is far more than a simple metal enclosure; it is a precision-engineered housing designed to protect critical electrical, automation, and human-machine interface (HMI) components.

Our Control Panels are manufactured from high-quality base materials—including 304/316L stainless steel, cold-rolled steel, and aluminum—and undergo advanced CNC punching and automated bending processes to achieve precise dimensional tolerances for complex cutouts and conduit access holes. To ensure strict compliance with NEMA 4X and IP66 standards, we employ continuous TIG welding to guarantee structural watertight integrity and apply industrial-grade powder coatings for exceptional chemical resistance. These Control Panels are specifically designed for optimal thermal management and EMI/RFI shielding, effectively protecting your sensitive internal components.

As your trusted sheet metal fabrication partner, Supro MFG offers end-to-end custom control panel solutions, seamlessly supporting your project from rapid CAD prototyping through to high-volume, defect-free production.

Custom Control Panel fabrication Material Solutions

At Supro MFG, we offer a full range of metal materials to meet the demanding requirements of any industry or environment, and we can proactively advise our customers on metal fabrication techniques that utilize the properties of the materials to maximize the life and functionality of their products.

Cold-Rolled Steel

High mechanical strength and impact resistance. The coating offers excellent cost-effectiveness and is easy to form, making it the standard material for general-purpose indoor industrial control panels.

304/316L Stainless Steel

Exceptional corrosion and rust resistance. The interior surface is easy to sanitize and completely contamination-free, making it suitable for food, pharmaceutical, and sanitary-grade control panels.

Aluminum Alloy

Lightweight with excellent heat dissipation and thermal conductivity. Naturally oxidation-resistant and non-magnetic, it is commonly used in high-heat-generating and portable control panels.

FRP / Fiberglass

Excellent insulation properties and resistance to corrosion from strong acids and alkalis. Lightning-proof and non-sparking, specifically designed for offshore engineering and chemical/fertilizer control panels.

Polycarbonate (PC)

High impact resistance and good light transmission. High insulation and protection rating, commonly used for outdoor control panels with transparent viewing windows.

Galvanized Steel

The galvanized coating possesses self-healing corrosion resistance and provides strong structural support. It is rust-resistant and durable, and is widely used for internal mounting base plates (sub-panels) in control panels.

Securing Your Designs with Enterprise-Grade Confidentiality at Every Stage of Manufacturing

Your Innovation, Protected:
Uncompromising IP Security & NDA Compliance

At Supro MFG, we understand that your designs are your most valuable assets. As a strategic sheet metal stamping partner, our commitment to your intellectual property is absolute. We operate under a strict Zero-Leak Policy, ensuring that every blueprint, CAD file, and prototype remains strictly confidential within our secure engineering ecosystem.

We proactively offer comprehensive Non-Disclosure Agreements (NDAs) that align with international legal standards, providing you with a transparent and enforceable framework for cooperation. Beyond legal paperwork, our internal protocols include segmented data access, secure server encryption, and rigorous staff training on IP sensitivity. Whether you are a startup scaling a disruptive product or an OEM managing sensitive aerospace components, Supro MFG acts as a secure extension of your own facility. Partner with a metal stamping manufacturer that values your competitive advantage as much as you do.

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Common Issues with Control Panels

In industrial automation, power distribution, and HVAC systems, control panels serve as a critical line of defense for protecting sensitive electronic components. Any manufacturing defect—such as a failed gasket, an HMI cutout that exceeds tolerance limits, or a stripped grounding stud—can lead to a loss of IP/NEMA protection, equipment short circuits, and serious safety hazards. Based on strict NEMA/IEC standards and field data provided by system integrators, the following is an engineering-level analysis of several of the most common defects found in control panels, including their root causes and our rigorous solutions.

Ingress Protection (IP/NEMA) Failure

Water or dust penetrates around door gaskets, causing ingress protection failure. This is typically caused by inconsistent manual gasket installation, porous corner welds, or door deformation that prevents the gasket from being compressed evenly.

We employ an automated in-place forming (FIP) polyurethane foam gasket application system to ensure seamless, continuous sealing joints. All control panel joints undergo continuous robotic TIG welding and rigorous penetrant testing to guarantee compliance with NEMA 4X and IP66 water and dust resistance standards.

Human-Machine Interface (HMI) and Component Cutout Dimensions Exceed Tolerances

Control Panels may experience issues such as buttons, touchscreens (HMI), or cooling fans failing to fit into designated cutouts. This stems from dull CNC punching dies, uncalibrated laser equipment, or failure to account for powder coating thickness in final cutout dimensions.

We utilize high-precision fiber laser cutting systems and precisely calculate cut width and coating thickness tolerances during the CAD/CAM phase. Every batch undergoes rigorous First Article Inspection (FAI) using go/no-go gauges to ensure critical cutout dimensions perfectly match your components.

Grounding Continuity Failures

Due to the thick powder coating, grounding studs or brackets become insulated, preventing electrical grounding points from passing continuity tests during on-site wiring.

Prior to the powder coating process, we install high-temperature-resistant silicone protective caps on all internal grounding studs and connection points. We use galvanized self-riveting grounding fittings to ensure zero resistance and strict compliance with UL 508A safety standards.

Powder Coating Peeling and Edge Rusting

The coating on the control panel peels at the corners, or rust spreads inward from the edges. This is typically caused by sharp, unchamfered edges that prevent the powder coating from forming sufficient thickness (Faraday cage effect), or by inadequate chemical degreasing prior to coating.

At Supro MFG, every control panel undergoes meticulous deburring to eliminate sharp edges. Subsequently, it undergoes an automated, multi-stage iron phosphate or zirconium pretreatment process, followed by electrostatic powder coating, to ensure exceptional adhesion and salt spray corrosion resistance.

No design files? Let Supro MFG do it for you.

We often come across clients who have no professional design drawings and documentation, only a creative idea, which leads to the project being at a standstill.

If you are in this situation, then contact our team of experts.

Supro MFG, as an industry-leading custom metal fabricator, has an ever-experienced team of engineers who utilize their extensive fabrication experience and technical expertise to build your idea into a real product and create design files such as STEP/STP/SLDPRT/DXF/PDF/PRT/DWG/AI.

That’s what makes SUPRO MFG so great, and 2,000 corporate, entrepreneurial, artist, and other purchasers from around the world enjoy working with us and benefiting from our one-stop manufacturing services.

One-Stop Solution for Custom Control Panel

Typical Applications for Control Panel

Industrial Automation

Operating environments are dusty and subject to continuous mechanical vibration. Control panels must provide excellent electromagnetic compatibility (EMC), a high IP protection rating, and strict compliance with UL508A or IEC electrical safety standards.

Water and Wastewater Treatment

Long-term exposure to high humidity and corrosive gases such as hydrogen sulfide. Control panels must have IP66 / NEMA 4X-rated corrosion and moisture resistance, and be equipped with internal anti-condensation heating modules.

Food & Beverage Processing

Control panels must withstand frequent high-pressure chemical rinsing. They must feature a seamless sloped top cover and a hygienic design with no blind spots, and fully comply with FDA and EHEDG hygiene certification standards.

Oil & Gas / Hazardous Locations

The site contains flammable and explosive gases or dust accumulation. The control panel must feature explosion-proof (Ex d / Class I, Div 1) performance, a positive-pressure purging system, and extremely high airtightness with safety redundancy.

HVAC and Building Automation

Continuous temperature control is required, and internal wiring is complex and extensive. The control panel must feature a clear layout with standard wire numbering diagrams, as well as a well-ventilated heat dissipation structure and BMS bus communication interfaces.

Renewable Energy

These systems are constantly exposed to intense UV radiation and extreme diurnal temperature fluctuations. The control panel must be resistant to UV aging and thermal stress caused by high and low temperatures, provide surge protection against lightning strikes, and meet NEMA 4 outdoor waterproofing standards.

A part is only as good as its finish.

High-Performance Surface Finishing: Aesthetics Meets Durability

At Supro MFG, we understand that professional custom metal fabrication requires more than just structural integrity—it demands surface treatments that withstand harsh environments and strict aesthetic standards.

Our integrated finishing shop provides a seamless transition from the production line to the final coating, ensuring tight control over lead times and quality.