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.
Resolve Thin Plate Bending Springback & Housing Deformation Defect
Thin-gauge cold rolled and galvanized steel sheets are prone to obvious springback after bending, causing irregular outline, uneven panel gaps and assembly jamming. We adopt customized springback compensation mold design + segmented positioning bending process, control bending angle tolerance within ±0.15°, ensure flatness consistency of smart and multimedia equipment shells, eliminate warpage and uneven gap defects during mass production, greatly improving assembly yield.
Eliminate Welding Thermal Deformation, Welding Pits & Visible Seams for High-Appearance Equipment Shells
Multimedia and intelligent equipment exposed housings have ultra-high requirements for exterior finish; conventional welding easily causes thermal deformation, pits and rough welding traces. We adopt pulse precision TIG laser welding + subsequent fine grinding & deburring process to minimize heat affected zone deformation, realize nearly invisible welding seams, reduce post-coating rework rate, and satisfy high-grade appearance standards for commercial terminal housings.
Control Cumulative Dimensional Tolerance for Multi-Part Matching Assembly
Equipment shells consist of front panels, middle frames, rear housings and mounting brackets; cumulative machining deviation often leads to poor fitting between screen, circuit board and casing. We implement first article 3D full coordinate inspection, unified fixture positioning for all working procedures to lock tolerance chain, guarantee interchangeability of spare parts, simplify your final assembly work and lower product rejection rate.
Upgrade Galvanized Steel Surface Treatment to Solve Coating Peeling & Edge Rust Problems
Galvanized steel surface has passive film that easily causes poor paint adhesion, bubbling and peeling, and cutting edges are prone to rust after long-term use. We deploy targeted pre-treatment process for galvanized substrates: special degreasing + surface activation + phosphating passivation before powder coating, effectively enhance coating adhesion; finished products pass 500-hour salt spray test, effectively extending service life for indoor and semi-outdoor equipment scenarios.
Stabilize Batch Consistency for Large-Volume Repetitive Orders
Long-term bulk orders often suffer dimensional fluctuation between batches due to manual positioning errors. We adopt fixture standardized positioning + program locked machining parameters, implement sampling inspection for each batch of raw materials, semi-finished products and finished products, keep dimensional deviation stable in long-term repeated orders, suitable for large-scale mass production cooperation for intelligent and multimedia equipment brands.
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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