How do you prevent water ingress at cable entry points?

Cable entries use sealed glands with rubber grommets positioned at the bottom or side as specified, combined with internal drip channels to route condensation away from equipment.

CUSTOM-BUILT · MOQ 1 PIECE

Custom Sheet Metal Instrument & Electronics Enclosure Chassis | OEM/ODM

Q: How do you quote? What are the payment terms?

Send your requirements and receive a factory-direct quotation within 24 hours. We accept T/T (30% deposit, 70% before shipment), and support FOB, CIF and DDP shipping terms.

Custom sheet metal, not off-the-shelf — built around your exact requirements.

Your RequirementsShare drawings, specs or hand sketches
Free DFM & CADProduction-ready drawings at no cost
Rapid PrototypingFirst sample ships in 7–10 days

Custom sheet metal instrument and electronics enclosures and compact chassis housings for meters, amplifiers, communication devices and power modules
Precision cutouts for connectors, switches, LEDs, terminals and cable entries, positioned exactly per your drawing
Round vent rows and side louvers designed into the panels to keep internal electronics within operating temperature
In-house laser cutting, punching, bending, welding, grinding and anodizing/powder coating for tight-tolerance parts
Internal standoffs, screw bosses, mounting ears and corner holes arranged for your PCB and assembly
Free CAD/DFM review, prototype in 1–3 days, production in 8–15 days

✓ Free CAD design
✓ IP54–IP55
✓ ±0.1 mm tolerance
✓ ISO 9001 factory
✓ Quote in 24h

Submit Your Drawing Request a Quote Chat on WhatsApp

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You Buy Manufacturing Capability, Not A Fixed Product

Every cabinet on this page was built for a specific project. Your dimensions, materials, protection grade, door layout and cable entries are all decided by you — we handle structure design, process planning, fabrication and testing. This page shows what we have done and what we can do for your project.

SPCC cold-rolled steel, 1.2–2.0mm thick
IP54–IP65 protection, salt-spray tested
Precision CNC bending, ±0.1mm tolerance
Full welding + powder coating finish
In-house tooling & stamping capability
One-stop: design → fabrication → assembly

Product Overview

What This Enclosure Does

This custom black sheet metal instrument and electronics enclosure houses meters, amplifiers, communication devices, power modules or automation electronics. The housing is cut and formed around that device: round and rectangular I/O openings for connectors, switches and indicators, rows of round vent holes and side louvers for cooling, internal standoffs and corner mounting holes for PCB and wall/panel installation, built as a panel-and-tray or open-frame chassis. Brushed aluminum, anodizing or a fine matte black powder coat gives a consistent industrial appearance.

Key Functions Supported by the Housing

Power & signal I/O: round and rectangular cutouts for connectors, terminals, switches, LEDs and cable entries, laid out to your wiring plan
Cooling: round perforation rows and side louvers sized to exhaust heat from internal electronics while limiting dust ingress
Mounting: internal standoffs, screw bosses, wall/panel ears and corner holes arranged for your PCB and installation method
Protection & finish: sealed panel joints with optional gaskets/cable glands; corrosion-resistant anodizing or powder coating for indoor and semi-outdoor duty

Built To Your Drawing

SPCC cold-rolled steel, SGCC galvanized, SUS201/304 stainless, brass/copper, titanium or aluminum 5052; 0.1–5 mm standard range. Every opening, bend and fastener position follows your file; prototype in 1–3 days, production in 8–15 days.

😩 Typical Buyer Pain Points

Suppliers cannot hold tight tolerances on complex parts
Burrs and sharp edges requiring costly rework
Inconsistent quality between prototype and production
Long lead times blocking your assembly line
High tooling costs for low-volume parts
Poor communication when drawings need adjustment

✅ How SanJun Solves Them

±0.1 mm standard, ±0.05 mm ultra-precision available
Full deburring and edge-finishing as standard
Prototype-to-production consistency with in-process QC
Prototype in 7–10 days, production 15–25 days
No tooling cost for laser-cut and CNC-bent parts
Direct engineer contact, fast DFM feedback on your drawings

★ Our Core Advantage

Free Production-Ready CAD Design

No drawings? No problem. Send your power module specs — our engineers deliver manufacturable CAD drawings free of charge, saving you $500+ in third-party design fees and weeks of engineering time.

Get My Free CAD Design

MOQ 1Piece — Prototype Friendly

±0.1mmStandard Tolerance

7–10Days to First Prototype

ISO 9001Certified Factory Direct

What You Can Customize

📐Dimensions & Layout

Fully custom sizes matched to your power module, battery bank and maintenance clearance.

🧱Material & Thickness

SPCC, SGCC galvanized, SUS304 or Aluminum 5052; 1.0–3.0 mm per load and budget.

💧Protection Grade

IP54–IP55 sealing packages; upgraded gaskets and glands for harsher environments.

🚪Door & Access

Single / double / front-access / rear-access doors with custom locks and hinges.

🔌Cable Entry

Bottom or side entries, sealed gland positions and sizes to your wiring plan.

🌡️Thermal System

Vents, fans, heat exchangers or AC integration — engineered to your heat load.

Manufacturing Capability & Specifications

Custom Chassis & Precision Structural Parts — Capability Range
Material Options	SPCC / SGCC galvanized steel / SUS304 stainless steel / Aluminum 5052 / 6063
Thickness Range	0.8 – 3.0 mm (per part function and load)
Protection Grade	IP54 – IP65 (for protection boxes & outdoor housings)
Surface Treatment	Powder coating / anodizing / brushed / zinc plating
Tolerance	±0.1 mm standard; ±0.05 mm ultra-precision optional
Processes	Laser cutting, CNC punching, CNC bending, tapping, riveting
Welding	Spot welding / argon-arc / full-seam laser welding
Assembly	Hardware insertion, sub-assembly, wiring harness support
Finish Options	Deburring, grinding, silk-screen, laser marking
Packaging	Export-grade plywood case with anti-rust film

* All parameters are adjustable to your project. Contact us for a tailored engineering proposal.

How We Work With You — From RFQ to Delivery

Step 1 · 24hSend Requirements

Dimensions, module layout, or even a hand sketch — any format works.

Step 2 · FreeEngineering Review

Our engineers review manufacturability and propose structure optimizations.

Step 3 · FreeCAD Design

Production-ready drawings delivered for your confirmation. Unlimited revision until approved.

Step 4 · 7–10dPrototype

First article produced with full QC report and photos for your approval.

Step 5 · 15–25dMass Production

Batch fabrication with in-process inspection at every critical step.

Step 6Delivery & Support

Export plywood packing, FOB/CIF/DDP shipping, 12–24 months warranty.

Quality Control Before Every Shipment

Sealing test — every cabinet verified against IP54–IP55 rating
Dust-proof test — simulates long-term field dust exposure
Coating adhesion check — cross-hatch test on powder coating
Full-dimension verification — against approved CAD drawings
Weld & appearance inspection — seam quality and surface finish

Quality inspection reports and photos are provided with each order, so you can confirm workmanship before the goods leave our factory. Third-party inspection (SGS / TÜV / BV) is welcome.

Request QC Report Sample

Pricing & Trade Terms — No Surprises

⏱Quotation within 24 hours

Send specs → factory-direct quote in one business day. Volume pricing: unit cost typically drops 30–50% at 100+ pcs.

💳Payment

T/T 30% deposit, 70% balance before shipment. Sample orders and long-term partners: flexible terms available.

🚢Shipping

FOB, CIF and DDP supported. Export-grade plywood case with anti-rust film as standard.

🛡Warranty

12–24 months against manufacturing defects. Responsive after-sales with replacement parts support.

Proven in the Field

SanJun Hardware supplies custom chassis and precision structural parts to industrial equipment makers, automation integrators and electronics manufacturers worldwide. Global OEMs trust us with their production parts — most started with a prototype batch and scaled to ongoing supply.

2,500+Precision parts & chassis delivered worldwide

±0.05mmUltra-precision tolerance capability

100+Custom projects completed per year

Frequently Asked Questions

What is the minimum order quantity?

MOQ is 1 piece. We welcome prototype and small-batch orders so you can validate the design before scaling up.

Can you design the cabinet if we don't have drawings?

Yes. Free production-ready CAD drawing design is our core service. Provide your power module dimensions, weight and layout requirements, and our engineers will produce manufacturable drawings for your confirmation.

What drawing formats do you accept?

We accept STEP, IGS, DWG, DXF and PDF sketches. Even a hand sketch with key dimensions is enough to start.

How do you quote? What are the payment terms?

Factory-direct quotation within 24 hours of receiving your requirements. Payment by T/T (30% deposit, 70% before shipment). FOB, CIF and DDP shipping terms supported.

What is the typical lead time?

Samples take 7–10 days; mass production takes 15–25 days depending on quantity and surface treatment requirements.

Can the cabinet achieve IP55 or higher protection?

Yes. Our standard sealing design reaches IP54–IP55, and we can upgrade gaskets, cable glands and door structures for harsher environments.

Do you ship internationally?

Yes, we export worldwide with export-grade plywood packaging, and we support FOB, CIF and DDP shipping terms.