Custom sheet metal, not off-the-shelf — built around your exact requirements.
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.
Solve Thin-Plate Bending Springback & Structural Deformation Defect
Thin sheet metal used for communication and smart equipment structures easily generates springback after CNC bending, resulting in deformed outlines, uneven panel gaps and assembly failure. We adopt customized springback compensation mold design + segmented positioning bending technology, controlling bending angle tolerance within ±0.12°, ensuring flatness consistency of chassis frames and precision structural components, eliminating warpage and inconsistent gaps during mass production, greatly improving assembly pass rate.
Eliminate Welding Thermal Deformation, Weld Pits & Visible Seams for High-Precision Chassis
Communication chassis and exposed smart equipment structural parts demand high flatness and appearance quality; traditional welding easily causes thermal deformation, pits and rough weld traces, affecting assembly and shielding effect. We deploy pulse precision laser/TIG welding + follow-up fine grinding & deburring process to minimize heat-affected zone distortion, realizing nearly invisible welding seams, lowering post-surface-treatment rework rate, and meeting high-grade appearance & flatness standards for communication enclosure products.
Control Cumulative Dimensional Tolerance for Multi-Piece Assembled Structures
Precision sheet metal assemblies consist of multiple panels, brackets and mounting fittings; cumulative machining deviation often leads to misalignment during final assembly. We implement first-article 3D coordinate full inspection, unified fixture positioning for all working procedures to lock tolerance chains, guarantee interchangeability of spare parts, simplify your final assembly work and effectively reduce product rejection rate.
Optimize EMI Shielding Structure & Surface Conductive Treatment for Communication Chassis
Ordinary sheet metal chassis often suffer poor seam shielding, signal leakage and unstable conductive continuity. We customize shielding grooves, conductive contact strips and seam lap structures, with targeted conductive coating / nickel plating treatment, ensuring consistent electromagnetic shielding performance, helping communication equipment pass EMC electromagnetic compatibility certification smoothly.
Stabilize Batch Dimensional Consistency for Long-Term Repetitive Orders
Long-term bulk orders easily have batch-to-batch dimensional fluctuation caused by manual positioning deviation. We adopt standardized fixture positioning + program-locked machining parameters, implementing sampling inspection for raw materials, semi-finished products and finished products per batch, keeping dimensional deviation stable in repeated mass production, ideal for long-term framework order cooperation with communication and smart equipment brands.
Improve Coating Adhesion to Prevent Paint Bubbling, Peeling & Edge Rust
Cut edges and welding seams are prone to poor paint adhesion, bubbling and peeling after long-term use. We implement complete pre-treatment workflow: Degreasing → Derusting → Phosphating → Passivation before electrostatic powder coating, enhancing coating binding force; finished products pass 500-hour salt spray test, extending service life for indoor and semi-outdoor communication & intelligent equipment scenarios.
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 DesignFully custom sizes matched to your power module, battery bank and maintenance clearance.
SPCC, SGCC galvanized, SUS304 or Aluminum 5052; 1.0–3.0 mm per load and budget.
IP54–IP55 sealing packages; upgraded gaskets and glands for harsher environments.
Single / double / front-access / rear-access doors with custom locks and hinges.
Bottom or side entries, sealed gland positions and sizes to your wiring plan.
Vents, fans, heat exchangers or AC integration — engineered to your heat load.
| 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.
Dimensions, module layout, or even a hand sketch — any format works.
Our engineers review manufacturability and propose structure optimizations.
Production-ready drawings delivered for your confirmation. Unlimited revision until approved.
First article produced with full QC report and photos for your approval.
Batch fabrication with in-process inspection at every critical step.
Export plywood packing, FOB/CIF/DDP shipping, 12–24 months warranty.
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 SampleSend specs → factory-direct quote in one business day. Volume pricing: unit cost typically drops 30–50% at 100+ pcs.
T/T 30% deposit, 70% balance before shipment. Sample orders and long-term partners: flexible terms available.
FOB, CIF and DDP supported. Export-grade plywood case with anti-rust film as standard.
12–24 months against manufacturing defects. Responsive after-sales with replacement parts support.
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.
Send your power module specifications — free CAD design and factory-direct quotation within 24 hours.
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