We machine, blast, anodize, plate and inspect parts under one roof in Dongguan. Specify a surface finish and we hold it, measure it, and report it before the parts ship.
These four show up on almost every job we take over from another shop.
A fine finish requires a separate finishing pass with a smaller stepover and a sharper tool. If the shop runs one roughing cycle and calls it done, you will see visible tool marks and the Ra will not match the print.
Anodizing builds a ceramic oxide layer that grows both inward and outward. A thick hardcoat can add 20–30 μm per surface. Ignore that and a press-fit bore opens up. Mask the bore or size it undersize on purpose.
Media blasting is not selective. It hits edges harder than flats, so a 0.2 mm break edge becomes 0.4 mm. On a sealing face or a mating edge, that is enough to fail a leak test.
One shop reads a general surface note as bead blast. Another reads it as as-machined. You get two shipments that look different and no one can tell you which one matches the drawing.
Machining, deburring, finishing and inspection run in the same building, so the finish you approve on a sample is the finish you get on the run.
A surface finish number on a print tells the machinist where to stop. Ra 3.2 μm is a normal milling cut. Ra 1.6 μm needs a fresh insert and a lighter stepover. Ra 0.8 μm and below usually means a dedicated finishing pass, a smaller tool, and time on the machine you have already paid for once.
We ask three things before quoting: which faces actually touch something, what the part does, and whether the finish is cosmetic or functional. That decides the tool path. Anodizing a housing for looks is a different job from lapping a valve seat for sealing.
Anodizing, electroless nickel, zinc, silver and gold plating, powder coating, black oxide, bead blasting, tumbling, brushing and polishing are all available. Laser marking goes on top, with a minimum character height of 1.5 mm so the mark stays legible after coating.
The order matters. Blast before anodizing. Polish before plating. Mask threads, bores and electrical contact points before any build-up process. We write the sequence into the traveler so the parts do not come back from finishing with a filled thread or a plated connector pad.
Start from what the surface has to do, then pick the process.
| Requirement | Typical Finish | Watch Out For |
|---|---|---|
| General machined look | As-machined Ra 1.6–3.2 μm | Visible tool marks on deep pockets |
| Smooth sealing face | Fine machined Ra 0.2–0.8 μm | Needs a separate finishing pass |
| Corrosion resistance | Anodizing or electroless nickel | Dimensional growth on tight bores |
| Uniform matte look | Bead blast then anodize | Edge rounding on seal faces |
| Electrical conductivity | Conductive anodize or gold plating | Mask contact pads first |
| Wear surface | Hardcoat anodize | Brittle on thin walls |
| Cosmetic metal sheen | Brushing or polishing | Grain direction must be stated |
| Marking on coated parts | Laser marking after coating | Minimum 1.5 mm character height |
One purchase order covers machining, finishing and inspection.
16 simultaneous 5-axis centers cut contoured faces in one setup, which keeps the surface consistent across a part that would otherwise need three fixtures.
27 three-axis machines, 12 four-axis mills and 16 mill-turn centers handle prismatic and round parts up to 4,000 mm.
Prototype parts in 3–5 days so you can approve a finish sample before committing to a production run.
Bent and formed parts with deburring, blasting and powder coating matched to the machined components around them.
SLA, SLS and FDM for form checks. Printed surfaces are not a substitute for a machined Ra callout, so we say so up front.
Anodizing, plating, coating, blasting, tumbling, brushing, polishing and laser marking as a standalone service or after machining.
| Item | Range | Notes |
|---|---|---|
| As-machined finish | Ra 1.6–3.2 μm | Standard milling and turning |
| High-grade finish | Ra 0.8–1.6 μm | Fresh tooling, lighter stepover |
| Fine finish | Ra 0.2–0.8 μm | Dedicated finishing pass |
| General tolerance | ±0.005 mm | Hold on critical features |
| Maximum part size | 4,000 mm | Larger travels on 5-axis centers |
| Rotary table | Ø400 mm | For round and index features |
| Materials | Aluminium, stainless, steel, copper, titanium | 75+ grades in total |
| Laser marking | Minimum 1.5 mm character height | Applied after coating |
| Inspection | 100% before shipment | Reports on request |
Numbers we can back up, not adjectives.
Founded in 2011, 150 technicians across 3 wholly-owned plants. Long enough to have seen every finish argument between design and the shop floor.
We size features for coating build-up and mask what must not grow. Tight bores stay tight after anodizing.
16 five-axis, 12 four-axis, 27 three-axis and 16 mill-turn centers. The right machine for the face, not the only one we have.
Quotation and free DFM analysis within 12 hours. Production can start within 24 hours of approval.
Raw material check, in-process monitoring and final inspection. Surface and dimensional reports on request.
From one prototype to 10,000+ part runs. Approve a finish sample before the production order is released.
Housings and brackets need a repeatable matte texture after coating, and sealing faces need a controlled Ra. We hold IATF 16949:2016 process discipline on these parts.
Joint housings and arm links need low-friction bores and cosmetic outer surfaces in the same part. We mask bores and blast only the visible faces.
Instrument bodies need a smooth, cleanable surface with no trapped media and no sharp edges. Bead blast residue and burrs are both inspection items.
Large frames and plates up to 4,000 mm get as-machined faces where nothing touches them, and a controlled finish only on guide and mounting surfaces.
Ask what the face does. If it seals against an O-ring, slides against another surface, or carries an optical or fluid path, go finer. If it is a mounting face that only transfers load, Ra 1.6 μm is usually enough.
Going from Ra 1.6 to Ra 0.8 μm typically adds a finishing pass and machine time. Put the callout only on the faces that need it.
Yes. The oxide layer grows into the surface and slightly outward, so a hardcoat can add roughly 20–30 μm per surface. On a bore or a shaft with a tight fit, that is enough to matter.
Two fixes: mask the feature so it is not coated, or size it undersize before coating so the final dimension lands in tolerance. Tell us which features are fits and we will handle the offset.
Yes, with masking. We cover bores, threads, sealing faces and datum surfaces, then blast the rest. This is common on housings where the outside is cosmetic and the inside is functional.
Keep in mind that blasting rounds edges. If an edge is a sealing edge or a press-fit lead-in, mask it or accept a larger radius.
It depends on the depth-to-diameter ratio and the tool reach. A long, slender tool deflects, so the wall finish and the floor finish will not match a shallow pocket.
Send the geometry and we will tell you what Ra is realistic before quoting. Sometimes the answer is to split the pocket into two operations or use a different toolpath.
Aluminium anodizes well, including hardcoat and conductive variants. Stainless and steel take electroless nickel, zinc, silver and gold plating, plus black oxide. Copper and brass plate and polish cleanly.
Titanium and Inconel are harder to finish consistently. We machine them, but we will tell you when a decorative finish is not worth the cost.
Both. Inspection covers raw material, in-process checks and a final pass before shipment. Surface condition is checked visually and, where a Ra callout exists, against the specified range.
Inspection reports are available on request. Say so at the quote stage so the report is built into the traveler.
Yes. There is no minimum order quantity, so a single sample part is a normal first step. We machine it, finish it, and you keep it as the reference.
Once you sign off, the same process, tooling and finish sequence goes into the production traveler.
Tell us the part number, the feature and the measured value. We pull the inspection record and the process sheet for that lot and compare.
If we missed the callout, we rework or remake. If the drawing was ambiguous, we fix the drawing note with you so the next run is not a guess.
Upload your files and we will come back with a quote, a DFM note and a surface finish recommendation within 12 hours.
12-hour quote100% inspectionNo MOQNDA 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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