One-stop precision sheet metal manufacturing
One-stop OEM partner for precision ground parts: MetlTek runs precision sheet metal, mechanical assembly and complete unit delivery from a single plant in Kunshan, China. Founded in 2001, the factory runs three laser cutting machines (a Trumpf 3030 plus two Hongshan machines, the largest 6000 x 2540 mm), a 6.5 m CNC gantry machining center, a Salvagnini P2Lean bending center, Panasonic and Fronius welding robots and an 8 m rail-mounted welding cell. Finished goods ship to industrial customers across Europe and North America.
Three commitments we are judged on by every customer, on every order.
Round-the-clock response
Send drawings at any hour — an engineer replies within one working day, not an automated ticket.
Factory-direct pricing
No trading layer in between. You buy from the plant in Kunshan that actually cuts, bends and welds the parts.
Delivery you can plan around
Committed lead times, serialised inspection records and export packing that survives ocean freight.
| Material | Cold-rolled steel DC01, galvanised steel, stainless steel 304 / 316, aluminium |
|---|---|
| Sheet thickness | 0.8 – 6.0 mm |
| Tolerance | ± 0.05 mm (laser cut, all machines), ± 0.25° (Salvagnini / TRUMPF bending), ± 0.3 – 0.5° (conventional brakes) |
| Surface finish | Powder coating to RAL (2 automatic lines), zinc plating, brushed or polished |
| Minimum order | 1 piece for prototypes, series from 50 pieces |
| Lead time | Sample 7–10 working days · series 3–5 weeks |
Surface grinding is usually a correction, not a primary operation: it is how a face that has already been cut, formed and welded becomes flat and parallel within a figure a mating part can rely on. That is why it belongs at the end of the route. We grind seats, faces and pads where the drawing states a flatness or parallelism requirement, and we check the result rather than inferring it from the setting.
| Equipment | Precision surface grinders for flat and parallel work |
|---|---|
| Applied to | Cut, formed and welded parts, plus round and profiled components |
| Requirement | Flatness and parallelism stated per face, against a datum |
| Sequence | Run after welding, so the ground face keeps its tolerance |
| Materials | Carbon steel, stainless 304 / 316, aluminium, tool steel |
| Inspection | Dimensional record; full-surface optical vision measurement on sheet metal parts |
Four things that decide whether a metal enclosure project lands on time and on budget.
Tolerances we can hold
±0.1 mm on laser-cut features and ±0.3 mm on formed parts, verified before dispatch.
Quality you can audit
ISO 9001 processes, first-article inspection and a measurement report with every series batch.
One supplier, five processes
Cutting, bending, welding, coating and mechanical assembly under one roof — no hand-offs between vendors.
Built for export
Export-grade packing, customs documentation and container loading planned for Europe and North America.
Optical sorter cabinets, infeed frames and buffer hoppers for Tomra (Norway). Anti-stray light precision is achieved through bending tolerance, robot seam welding and matte black interior coating. Highlights: precision light sealing, 6.5 m gantry machining in one setup, matte black interior.
Deep-drawn fan scrolls, guide rings and impeller shrouds for Ziehl-Abegg (Germany). One-piece forming means fewer seams and smoother inner walls, so pressure loss and noise stay low. Highlights: one-piece deep drawing, robot circumferential sealing weld, accurate balance datum.
Vertical collector housings with conical dust hoppers and support frames for Camfil (Sweden). Fully welded gas-tight construction with machined sealing flanges. Highlights: gas-tight welding, anti-bridging hopper forming, machined flange faces, outdoor-grade coating.
Laser machine control cabinet and sealed top housing (sheet metal structure only) for Trumpf (Germany). Sealing is continuous across the top joint so the IP66 rating carries across the whole cabinet. Highlights: IP66 sealing, sealed top transition, oil-resistant industrial coating.
Split upper and lower equipment frames with a machined mounting plate between them for AP TECH (Korea). The 6.5 m gantry mills the mounting face in one setup and assembly gaps are held uniformly. Highlights: gantry-machined mounting face, granite plate fitting, assembly gap control, rigid vibration-damped frame.
Sectioned conveyor frames, support structures, side guarding and drive housings (sheet metal structure only) for Vanderlande (Netherlands). 8 m rail-mounted robot welding keeps long sections straight and interfaces interchangeable. Highlights: long-section robot welding, interchangeable section interfaces, outdoor salt-spray coating.
Grinding in the wrong sequence
A face ground before welding is a face that will move afterwards. Grinding belongs after the last heat input, which is why the route is planned around it rather than added at the end.
Heat from the grinding pass itself
Grinding generates local heat, and on a thin part that heat is enough to bow the face being finished. Pass depth and cooling are set around the part's thickness.
A flatness figure with no reference face
Flatness is measured against something. The datum face is identified on the drawing so the result can be verified instead of trusted.
Condition of the ground surface
A ground face is a protected face. Ground parts are masked and packed so the surface that was just finished is still the surface that arrives.
Quality is measured, not claimed. A precision inspection system compares 40 million measurement points against your CAD in 0.1 seconds per part, and every batch is documented under our ISO 9001 system. Reference customers include TOMRA, TRUMPF, RITTAL, ZIEHL-ABEGG, CAMFIL, VANDERLANDE, MAHLE and WEISS TECHNIK.
There is no fixed MOQ. Prototypes and small batches from one piece are accepted, and unit prices fall as volume grows. One-off tooling cost is quoted separately.
Yes. We regularly work under NDA and produce strictly to customer drawings. Files stay on an internal server and are never shared with third parties.
A first-article sample is typically ready in 7–10 working days, and series production runs in 3–5 weeks depending on quantity and surface finish.
When the face has to be flat or parallel to a specific figure, or when the flatness has to be recovered after welding. Grinding is the correction that milling alone cannot guarantee.
Yes, and it is the normal answer where a bolted-on part needs a true seat. The face is ground after the weld has cooled, so the flatness survives.
Yes. Ground faces are dimensionally recorded, and sheet metal parts also go through full-surface optical vision measurement with an automatic deviation report.
Send your drawings and quantity — you will get a quotation with lead time, not a sales script.
Tell us what you need — our engineer replies within 1 working day.