Tooling, tariffs and freight are pushing buyers to look past a single country. We machine prototypes and production parts in Dongguan, and help teams split work between Vietnam and China without losing tolerance control.
Moving a part from one country to another is a process change, not a shipping change. These are the failures we see most often.
A new supplier proves out the first article, then changes the fixture or the machine for the next run. Position shifts by 0.05 mm and the assembly no longer closes. Nobody notices until incoming inspection, which is already too late.
Die casting and injection tooling need steel, heat treatment and a trial run. When the tool shop is a subcontractor of a subcontractor, the schedule slips by weeks and the first samples arrive with flash and short shots to fix.
Ra 0.8–1.6 μm on a sealing face is a process requirement, not a note. A shop that only has an as-machined Ra 1.6–3.2 μm capability will quote the part anyway and leave you to rework it.
Dual sourcing only works if both sites read the same revision. When the Vietnam partner and the China partner work from different CAD files, the parts arrive dimensionally correct and functionally incompatible.
Vietnam is becoming attractive for assembly and volume plastics. Precision metal parts still need proven capacity, and that is the part we keep.
Dual sourcing fails on documentation, not on machines. Every part we quote starts with a DFM review inside 12 hours. We return the drawing with the datum scheme, the critical dimensions and the features that will need a custom fixture. That document becomes the shared reference for both production sites.
We run raw material check, in-process monitoring and final inspection on 100% of parts before shipment. Reports are available on request, so a Vietnam assembler and a China machinist can be measured against the same numbers.
Most parts can be made in more than one place. The decision usually comes down to size, tolerance and material. A 4,000 mm frame needs a machine with 4,000 × 400 × 150 mm of travel. A titanium impeller with blended surfaces needs simultaneous 5-axis motion, not 3+2 indexing.
Our floor has 16 simultaneous 5-axis centers, 12 four-axis mills, 27 three-axis machines, 16 mill-turn centers and a Ø400 mm rotary table. That range lets us tell you early whether a part belongs in a lower-cost region or in a shop that can hold ±0.005 mm all day.
A practical split for a dual-sourcing program. Neither column is always right.
| Part or process | Good fit for a new site | Keep in a proven shop |
|---|---|---|
| Simple brackets, covers | Yes, once drawing is frozen | Not necessary |
| Tight bores and bores on position | Only with a CMM on site | Yes, ±0.005 mm work |
| Die cast housings | Yes for volume, after tool trial | Small runs under 1,000 |
| Titanium and Inconel parts | Rarely, tool life is hard to control | Yes, 5-axis and tooling |
| Sealing faces | Only with Ra 0.8–1.6 μm capability | Yes, lapping and finishing |
| Cosmetic anodized panels | Yes, if color is matched to a master | Yes for hardcoat and conductive |
| Prototypes and one-offs | Slow, tooling cost is high | Yes, no minimum order |
Six services that cover the metal side of a dual-sourcing program.
16 simultaneous 5-axis centers for contoured housings, impellers and parts that need one setup instead of four.
12 four-axis mills and 27 three-axis machines for prismatic parts, plates and brackets in volume.
16 mill-turn centers and a Ø400 mm rotary table for shafts, fittings and turned-bore parts.
One-off and bridge parts with no minimum order, so a design can be tested before tooling is cut.
Aluminium die casting for ADC12 housings, with machining and finishing after the casting is trimmed.
Anodizing, plating, powder coating, black oxide, blasting and laser marking with a 1.5 mm minimum character height.
The same list applies to prototypes and to 10,000+ part runs.
| Item | What you get | Typical window |
|---|---|---|
| Quotation | Price, DFM notes, material suggestion | Within 12 hours |
| Production start | Material ordered, fixtures cut | Within 24 hours |
| Part shipment | Finished, inspected parts | 3–5 days |
| Inspection | Raw material, in-process, final | 100% of parts |
| Confidentiality | Secure upload, NDA on request | Before drawings are shared |
| Order size | One prototype to 10,000+ parts | No minimum order |
We quote this as a working limit, not a best case. Parts that need to go tighter get a process review before we say yes.
Measured against the drawings we ship to. If a feature falls outside, it does not leave the plant.
Operating since 2011, with 150 technicians across three wholly owned plants.
Machining, finishing and inspection under one roof, so parts do not travel between vendors.
ISO 9001, IATF 16949, ISO 13485 and ISO 27001 cover quality, automotive, medical and data handling.
A record figure, not a guarantee. We give you the number because schedules get discussed anyway.
Material traceability and a dimensional report on every lot, not a sample.
IATF 16949 process control for housings and fixtures that see vibration.
ISO 13485 documentation and cleanable finishes on stainless 316L and 17-4PH.
Repeatable mill-turn parts that keep a robot arm aligned after thousands of cycles.
For assembly, plastics and simple metal parts, yes. The cost advantage is real and shipping to the US is shorter than from South China.
For tight-tolerance metal parts the picture is mixed. Tool life on titanium and Inconel, CMM capacity and heat-treat supply are the usual gaps. That is why we suggest keeping the hard parts in a shop that already runs them and moving the rest.
Freeze the drawing and the datum scheme first. Then send the same inspection plan to both sites.
We ship the workholding drawings and the dimensional report with the parts. A second site that has the fixture and the report can repeat the setup instead of reverse-engineering it.
±0.005 mm is our working limit for qualified features on the right material and setup. Tighter is possible on specific bores after review.
On long parts, thermal growth matters more than the machine. We will tell you when a feature should be measured at a controlled temperature rather than promised on paper.
Aluminium 6061, 6061-T6, 7075 and 6082 for housings and brackets. Stainless 303, 304, 316L and 17-4PH for medical and food-contact parts.
We also run 4140 and 4340 steel, titanium TC4, Inconel, beryllium copper and magnesium AZ31B.
Yes. Production can start within 24 hours when the drawing is released and the material is in stock.
For die cast or injection parts, we cut a soft tool or machine a bridge batch so the design can be tested while the production tool is still in heat treatment.
Uploads are secure and confidential, and an NDA is available before drawings are shared.
We hold ISO 27001:2022, which covers how design data is stored and who can open it. If your Vietnam partner needs a specific subset of files, we can issue that subset rather than the full package.
One part. There is no minimum order quantity, and the same DFM review applies whether you order one prototype or 10,000 parts.
Small runs are often the right way to test a new supply chain before committing tooling budget.
When the part needs a custom fixture, a CMM program and a surface finish that only one shop can produce. Duplicating all three rarely pays back below a few thousand units a year.
In that case, run one site and keep a qualified second source on paper. We can quote the part so you have a documented alternative without moving volume.
We review the geometry, the tolerance and the material, then tell you what belongs in a low-cost region and what does not. Quotation and DFM analysis come back within 12 hours.
12-hour quote100% inspectionNo minimum orderNDA on request
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Upload your 3D model or 2D drawing and get a quotation with a free DFM analysis. Maximum processing size 4,000 mm.
CNC Metals 13 grades
CNC Plastics 10 grades
Machines & processes 12 options
Surface & post-processing 10 options
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