Electronics and electrical equipment are only as reliable as the enclosures that house them. From industrial automation controllers to solar inverters, medical devices, and telecommunications hardware, the enclosure is the first line of defense against moisture, dust, electromagnetic interference, and physical damage. Getting that enclosure right requires both engineering knowledge and manufacturing expertise.
At Metaltech Products, Inc., we fabricate custom sheet metal enclosures for electronics and electrical applications across a wide range of industries. With more than 20 years of experience and a full suite of in-house services, we help OEMs and engineers bring well-engineered enclosures to production efficiently and consistently. Visit our Services page for a full overview of what we offer.
Why Sheet Metal Is the Right Choice for Electronics Enclosures
Sheet metal is the dominant material for electronics enclosures in industrial, commercial, and infrastructure applications. Sheet metal offers a compelling combination of strength, machinability, and finish options that plastic or composite alternatives often can’t match in demanding environments. Key advantages include:
- Structural rigidity for mounting heavy components or withstanding mechanical stress
- Superior EMI/RFI shielding when properly designed and grounded
- Thermal conductivity that assists passive heat dissipation
- Broad compatibility with protective finishes, including powder coating
- Dimensional precision for tight-tolerance component fits
- Long service life across a wide range of operating environments
The design and fabrication of sheet metal enclosures requires careful attention to material selection, bend design, seam integrity, and finishing — all factors that must be addressed before production begins to ensure a reliable end product.
Key Design Considerations for Sheet Metal Electronics Enclosures
The critical factors engineers must address to produce an enclosure that performs reliably in its operating environment. The most important design considerations include:
EMI/RFI Shielding
Electronics that generate or are sensitive to electromagnetic interference require enclosures with effective shielding. Sheet metal achieves shielding effectiveness through material choice, like how steel offers better inherent EMI shielding than aluminum, combined with tight seam tolerances and proper grounding provisions. Apertures for ventilation, displays, or cable entry must be carefully designed; small holes or slots spaced less than half a wavelength apart maintain shielding integrity while allowing airflow or access.
Thermal Management
Heat buildup is a leading cause of electronics failure. Sheet metal enclosure design must account for conduction cooling (heat transfer through enclosure walls) and convection cooling (airflow through the enclosure). Design features that support thermal management include ventilation louvers, perforated panels, fan mounting provisions, heat sink attachment points, and strategic component layout that separates heat-generating sources from heat-sensitive parts.
IP and NEMA Ratings
Ingress protection (IP) ratings and NEMA classifications define how well an enclosure protects against solid particles and liquids. Outdoor electronics enclosures typically require IP54 or higher, while harsh industrial environments may require IP66 or NEMA 4/4X ratings. Achieving these ratings depends on tight sheet metal tolerances, proper gasket design, and careful seam fabrication.
Material Selection
Cold-rolled steel is the most economical choice for indoor, controlled environments. Stainless steel (typically 304 or 316 grade) is preferred for high-humidity, corrosive, or sanitary applications. Aluminum reduces weight and offers natural corrosion resistance for lighter-duty applications. Metaltech works with mild steel, stainless steel, aluminum, copper, and other metals to match your enclosure to its operating environment.
Metaltech’s Fabrication Process for Electronics Enclosures
Building a high-quality electronics enclosure requires precision at every step. Control system and electronics enclosures demand the same dimensional accuracy as any precision component. Here’s how Metaltech approaches it:
Laser Cutting cuts blanks and panels to precise dimensions, including ventilation slots, mounting holes, cable knockouts, and display cutouts — all in a single high-accuracy operation that maintains consistency across production runs.
Sheet Metal Forming uses press brakes to bend panels, flanges, and lips to exact angles. Proper forming ensures tight seams critical for IP-rated enclosures and consistent fitment of lids, doors, and panels.
Welding joins enclosure components using MIG or TIG processes by our AWS-certified welders. Continuous, sealed weld seams are essential where water ingress resistance or structural integrity requirements demand it.
Powder Coating provides a durable, uniform finish that protects enclosures from corrosion, abrasion, and UV degradation. Our system handles enclosures up to 26 feet long in virtually any color or texture.
Assembly Services install hardware, hinges, latches, cable glands, DIN rails, mounting panels, and other components before delivery — so your team receives a ready-to-install enclosure.
Industry Applications for Custom Sheet Metal Enclosures
Custom sheet metal electronics enclosures serve an extraordinarily broad range of applications. Metaltech fabricates enclosures for clients across many of the industries we serve:
- Electronics & Technology Infrastructure: Server enclosures, network equipment housings, and control cabinets
- Agriculture: Control system enclosures that protect electronics from dust, moisture, and temperature extremes in the field
- Green Energy: Solar inverter housings and wind turbine control cabinets requiring weatherproof ratings
- HVAC: Control panel enclosures with integrated ventilation for heating and cooling systems
- Oil & Gas: Robust housings for control and monitoring equipment in harsh industrial environments
- Medical & Healthcare: Equipment housings built to cleanliness and surface finish standards
- Government & Defense: Custom enclosures built to MIL-SPEC and security requirements
Frequently Asked Questions
Does Metaltech have experience fabricating electronics enclosures?
Yes. Metaltech fabricates a wide variety of custom enclosures, housings, and cabinets for electronics, electrical, and industrial automation applications. Our engineering team can work from customer drawings or help develop enclosure designs optimized for fabrication and performance.
What finishing options are best for electronics enclosures?
Powder coating is our primary finishing method and an excellent choice for most electronics enclosures — providing corrosion protection, UV resistance, and a professional appearance in any color. For stainless steel enclosures in sanitary or highly corrosive environments, a brushed or passivated finish may be appropriate. See our Powder Coating page for available options.
Can Metaltech fabricate enclosures with EMI shielding or IP-rated designs?
We fabricate to customer specifications, including tight dimensional tolerances required for effective EMI shielding and proper gasket sealing for IP-rated designs. Your engineering team defines the performance specs; Metaltech executes the fabrication to meet those requirements with precision.
What assembly capabilities do you offer for enclosure projects?
Metaltech’s Assembly Services include installation of hardware, hinges, latches, cable glands, mounting rails, DIN rails, and other components. Pre-assembled enclosures reduce your installation time and ensure consistent build quality across production volumes.
Ready to discuss your electronics enclosure project? Request a Quote today, or schedule a tour of our Lebanon, Missouri facility to see our fabrication capabilities firsthand.
