This article details how PUMAYCASE delivered a fully customized aluminum enclosure solution for an industrial wireless gateway product. The project involved precision CNC machining, black sandblast anodizing 1, integrated PCB mounting hardware 1, and brand logo marking — all completed within a tight delivery schedule. The case serves as a practical reference for engineers and product managers sourcing enclosure solutions for IoT and industrial communication devices.
Client Industry: Industrial IoT (IIoT) Device Manufacturer Product: RSWNI-GW Industrial Wireless Gateway Service Scope: Enclosure customization + CNC machining + surface finishing + PCB mounting — full turnkey solution 1
The client specializes in industrial wireless communication equipment and required a compact aluminum enclosure for their next-generation wireless gateway. The enclosure needed to provide industrial-grade structural strength, reliable heat dissipation, and a professional exterior finish suitable for end-product branding. 4
| Requirement | Specification |
|---|---|
| Material | Aluminum alloy — lightweight with structural rigidity |
| Surface Finish | Black sandblasting + anodizing, matte texture 1 |
| Cutouts | Dual SMA antenna holes, RJ45 port, power terminal slot, mounting ear holes |
| PCB Fixing | Secure internal board mounting with vibration resistance 1 |
| Branding | Logo silkscreen printing on enclosure surface 1 |
| Lead Time | Fast prototyping for approval, batch delivery on schedule |
The client provided detailed engineering drawings specifying all hole positions, dimensional tolerances, Pantone color codes for surface finishing 1, enabling a streamlined and efficient customization process.
After structural evaluation, the AR Series aluminum tube extrusion enclosure 4 was selected for this project, offering the following advantages:
The following CNC operations were performed to accommodate all interface requirements 1:
| Machining Location | Process | Specification |
|---|---|---|
| Dual SMA Antenna Holes | CNC drilling | Ø6.5mm, tolerance ±0.05mm |
| RJ45 Network Port | CNC milling | 16mm × 13.5mm rectangular cutout |
| Green Terminal Block Slot | CNC slot milling | Custom width slot |
| Side Mounting Ears | CNC milling + tapping | M3 threaded holes × 2 2 |
| LED Indicator Holes | CNC drilling | Ø3mm window holes |
| Internal PCB Mounting Holes | Drilling + tapping | M3 × 4 corner positions, tolerance ±0.1mm 2 |
The internal PCB was secured using a press-fit rivet nut + copper pillar combination 1, ensuring reliable stability under industrial vibration conditions:
① Press-Fit Rivet Nuts — Base Panel M3 press-fit rivet nuts 2 were permanently installed into the four PCB mounting points on the aluminum base panel, creating robust internal threads without welding — allowing easy disassembly and re-assembly.
② Copper Pillar Standoffs — Height Isolation 5mm brass copper pillars were mounted onto the rivet nuts, lifting the PCB to a safe height above the metal surface and providing essential electrical insulation to prevent short circuits. 1
③ M3 Machine Screws — Final Locking M3 screws were fastened through the PCB top surface into the copper pillars, completing a secure and serviceable assembly. 2
A sandblasting + black anodizing dual-process treatment was applied 1:
| Process Step | Description | Result |
|---|---|---|
| Sandblasting | Uniform matte sand texture applied | Anti-fingerprint, professional industrial appearance |
| Black Anodizing | Oxide film thickness 15–20μm 1 | Corrosion-resistant, improved heat dissipation |
| Logo Silkscreen Printing | Brand identity + model number printed 1 | Enhanced product recognition |
Available finish options from PUMAYCASE include anodizing, brushing, sandblasting, and Pantone color matching 1, giving clients full flexibility for brand-consistent aesthetics.
Upon receiving the prototype, the client conducted a full inspection covering hole position accuracy, surface finish quality, and PCB mounting stability — approving the sample and confirming the mass production order. 4
| Evaluation Item | Client Feedback |
|---|---|
| Dimensional Accuracy | ✅ All hole positions fully compliant with drawings |
| Surface Quality | ✅ Black matte finish exceeded expectations 1 |
| PCB Mounting Stability | ✅ Passed vibration testing — zero movement detected 1 |
| Delivery | ✅ On-time delivery met product launch schedule 4 |
| Overall Satisfaction | ⭐⭐⭐⭐⭐ Highly satisfied — follow-up batch orders placed |
"Lightweight aluminum enclosure + CNC precision machining + press-fit rivet nut & copper pillar PCB mounting + black anodizing" A four-in-one integrated solution perfectly addressing the industrial wireless gateway's requirements for strength, precision, thermal management, and professional appearance. 14
✅ One-Stop Service — From structural design to surface treatment, all processes in-house 1 ✅ Fast Response — Quotation within 24 hours, rapid prototyping turnaround 4 ✅ Quality Assurance — Strict international quality standards, full inspection at every stage 1 ✅ Small Batch Friendly — Suitable for startups and product validation phases 1
If you have similar products requiring custom aluminum enclosures, contact us for a tailored solution 14:
