Ultra-Thin & Precision Metal Stamping Down to 0.1mm
Precision Stamped Contacts, Terminals, Spring Contacts & EMI Shields for Electronics, Telecom & Automotive Applications. ISO 9001 Certified. Defect Rate <0.1%.
A Metal Stamping Partner Built on Precision and Trust
Sunjoy is a precision metal stamping manufacturer specializing in ultra-thin, high-speed stamping for electronics, automotive, telecommunications and home appliance industries. With over 20 years of experience, we produce stamped connectors, terminals, spring contacts, EMI shields and precision clips in material thicknesses from 0.1mm to 5mm.
Our factory combines 35–180T pneumatic presses, 2 dedicated high-speed stamping lines and in-house tooling capability — backed by a dedicated QA team, English QC documentation and a defect rate maintained under 0.1%. From first drawing to mass production, we work as an extension of your engineering and sourcing team.
Factory Strength
Two decades of investment in presses, tooling and inspection equipment — so your parts ship right the first time.
Equipment & Facilities
From pneumatic presses to CMM inspection — all under one roof.
Pneumatic Presses
35–180T press range for progressive die and general-purpose stamping.
High-Speed Stamping Lines
2 dedicated high-speed lines for thin materials and large-volume small parts.
In-House Tooling Shop
Die design, fabrication and maintenance handled internally for faster turnaround.
CMM Inspection
Coordinate measuring machine for dimensional verification and FAI reports.
Salt Spray Test
Corrosion resistance testing for plated and coated stamped parts.
Optical Measurement
Vision and profile measurement for small, complex stamped features.
All equipment is maintained on a scheduled preventive maintenance program, with calibration records available for customer audit.
Core Capabilities
Three capabilities define how we stamp: high speed, ultra-thin, and precision — each backed by dedicated equipment and proven process control.
High-Speed Stamping
2 dedicated high-speed stamping lines built for large-volume, small-part production — fast cycle times without sacrificing dimensional stability.
- 2 high-speed lines running in parallel
- Optimized for small parts at high volume
- Stable cycle times for predictable delivery
Ultra-Thin Capability
Down to 0.1mm material thickness — stamped without deformation or burrs, ideal for spring contacts, battery contacts and precision terminals.
- 0.1mm minimum material thickness
- No deformation, no burrs on thin foils
- Phosphor bronze, nickel silver & brass
Precision Stamping
±0.03mm tolerance on small stamped parts, verified with CMM inspection and delivered with English FAI and dimensional reports.
- ±0.03mm small-part precision
- CMM & optical measurement for verification
- English FAI & dimensional inspection reports
Quality & Certifications
Quality is not a department here — it's built into every step from raw material to final shipment.
ISO 9001
Quality Management System
Certified quality management system covering design, tooling, production and inspection — audited annually by an accredited third party.
ISO 14001
Environmental Management System
Certified environmental management covering waste handling, scrap recycling and energy use across the production floor.
Quality Control Flow
Five checkpoints from incoming material to final shipment.
Incoming Material
Material certificates & spec verification
In-Process
First-article & patrol inspection
Final Inspection
CMM & optical measurement
Documentation
English FAI & inspection reports
Shipping
Packing audit
Supply Chain Experience
Over two decades of supplying precision stamped parts into global supply chains — across four industries and multiple continents.
Our parts are integrated into products from Tier 1 automotive suppliers, global consumer electronics brands, European lighting manufacturers and US telecommunications OEMs. Due to non-disclosure agreements, we do not publish client names — but we're happy to discuss relevant experience during a call.
Automotive Electronics
Terminals, contacts and EMI shields for Tier 1 automotive suppliers in Europe and North America.
Consumer Electronics
Ultra-thin spring contacts and battery contacts for global consumer device brands.
Telecommunications
Precision clips and shields for US and European telecom equipment OEMs.
Home Appliances
Brackets, retainers and stamped housings for major home appliance manufacturers.
Want to know if we've worked on parts like yours? Send us your drawing — we'll tell you honestly what we've done and what we can do.
Discuss Your ProjectWhy Work With Us
We're not the cheapest supplier, and we don't try to be. We're the one that makes your job easier.
24-Hour Quote with DFM Feedback
You don't just get a price — you get engineering feedback on how to make your part cheaper or more manufacturable.
English Documentation, No Translation Step
FAI, material certificates and inspection reports are issued in English — your QA team can review them directly.
One Person Owns Your Quality Issue
A dedicated Quality Engineer is assigned to your account — no bouncing between departments, no lost emails.
Small Orders Welcome, Scale When Ready
Start with samples or small batches for validation — we scale to mass production when your product takes off.
Direct Communication, No Middlemen
You talk to the engineer who knows your part — not a sales rep reading from a script.
We Say No When We Should
If your design isn't a good fit for stamping, we'll tell you upfront — and suggest a better process. No wasted tooling cost.
Talk to a Real Person
No call centers, no ticket numbers. You'll work directly with the person who knows your parts.
Daisy Mmin
Sales & Engineering Manager
I've been working with metal stamping customers for over 10 years. Send me your drawings — I'll personally review them and come back with a quote and honest feedback within 24 hours.
Let's Build Something Together
Send us your drawings today. Within 24 hours, you'll have a quote and honest DFM feedback — no obligation, no pressure.
