GreatLight runs a custom CNC machining factory in Dongguan with 127 high-precision machines. Your 3D files become metal and plastic parts held to ±0.005 mm, from one prototype to 10,000+ part runs.
These are the losses engineers report before they move a job to a factory that machines it right the first time.
The pin drops straight through. Assembly stops, the batch is scrap, and the schedule slips a week while someone re-machines it. On a 500-piece order that is a full run lost to a reaming pass that was never in the setup sheet.
You specify Ra 0.8 μm on a sealing face and receive Ra 3.2 μm as-machined. The seal weeps under pressure test. Rework means stripping the part back to a bare surface, which costs more than the original cut.
A 0.5 mm wall on an aluminum housing looks fine on the bench and bows 0.05 mm after the fixture releases. The part passes nothing, and the cause is clamping pressure nobody documented.
You need a revised design priced by Friday. Silence from the shop means you cannot commit to your own customer, and the project drifts while a competitor quotes in two days.
Capacity, inspection and DFM feedback that keep tolerances inside the callout from the first cut.
A ±0.005 mm callout is not a machine spec. It is the outcome of how the part is fixtured, how the tool path is sequenced, and how often the operator stops to measure. We treat all three as one process.
Every job starts with a DFM review. If a wall is too thin to hold, a corner radius is smaller than the cutter can reach, or a datum is missing on the drawing, we say so before the first chip. That conversation happens within 12 hours of your upload.
Most shops want either a prototype or a production run. A machining factory that does both keeps the same setup logic from the first article to the last. We run one part or 10,000+ on the same floor, so the process that made your prototype is the process that makes your production batch.
For low-volume work we use the compact travel machines: 500 × 500 × 450 mm and 500 × 310 × 200 mm. For larger parts the floor reaches 4,000 × 400 × 150 mm. A Ø400 mm rotary table handles parts that need features on several faces.
Use this to sanity-check the process before you request a quote.
| Part feature | Machine class | Why |
|---|---|---|
| Deep pockets, undercuts, five-face features | Simultaneous 5-axis | One setup, no datum stack |
| Prismatic housings, bolt patterns on four faces | 4-axis mill | Indexed rotation, rigid hold |
| Turned shafts with cross holes or flats | Mill-turn | Concentricity held in one cycle |
| Flat plates, brackets, simple profiles | 3-axis | Fastest cycle, lowest cost |
| Thin walls below 1 mm | 5-axis with light finishing | Low radial load, less spring |
| Part over 750 mm | Large-travel 3-axis | Up to 4,000 × 400 × 150 mm |
One supplier for the metal-cutting steps and the finishing that follows.
Complex geometry, deep cavities and multi-face features cut in a single setup to ±0.005 mm.
Prismatic parts, plates and brackets. Fast cycles for simple profiles and tight bolt patterns.
Shafts, bushings and fittings. Cross holes and flats machined without losing concentricity.
First articles in days so you can test fit and function before committing to a production run.
Anodizing, plating, powder coating, bead blasting and laser marking, in-house or managed.
No minimum order quantity. Runs from one part to 10,000+, with the same inspection standard.
Numbers from our own floor, not a catalog.
| Item | Range | Notes |
|---|---|---|
| Tolerance | ±0.005 mm (±0.0002 in) | Dependent on feature and material |
| Surface finish | Ra 0.2–3.2 μm | Fine, high and as-machined grades |
| Maximum part size | 4,000 mm | Up to 4,000 × 400 × 150 mm travel |
| Rotary table | Ø400 mm | Multi-face parts in one setup |
| Materials | Aluminum, stainless, steel, copper, titanium | Plus POM, PEEK, PC, ABS, HDPE |
| Laser marking | 1.5 mm minimum character height | Serial numbers, logos, traceability |
Data points, not adjectives.
Three wholly-owned plants and 150 technicians handling prototype and production work under one quality system.
Verified in-process and at final inspection, with 100% inspection before shipment on every order.
Send a STEP file and get a price plus manufacturability feedback within 12 hours.
Once material and drawing are confirmed, the job is scheduled and cutting within 24 hours.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022 cover quality and data.
Parts that pass inspection first time, across prototype and repeat production orders.
Low-weight aluminum brackets with tight hole position and no burrs on load paths.
Housings and test fixtures that hold bore alignment across a production run.
Stainless components with clean surfaces and documented inspection records.
End-effector plates and gearbox mounts machined from aluminum and engineering plastics.
A STEP or IGES file plus a 2D drawing with tolerances, material and finish callouts. If you only have a 3D model, send it anyway and we will flag the dimensions that need a callout.
PDF drawings are fine for reference. Native CAD is not required.
No. That tolerance is achievable on most turned and milled features in stable materials, but it depends on wall thickness, depth-to-diameter ratio and how the part is held.
We review the drawing and tell you which features can hold ±0.005 mm and which need a different approach.
None. We machine one prototype or 10,000+ parts on the same floor with the same inspection standard.
Prototype pricing differs from production pricing, but there is no threshold you must cross to place an order.
Quotation and DFM analysis come back within 12 hours. Production can start within 24 hours of confirmation, and parts typically ship in 3–5 days.
Complex parts with secondary finishing take longer, and we state that in the quote rather than after the order.
Aluminum 6061-T6, 7075 and 2024, stainless 303, 304, 316L and 17-4PH, plus steel alloys, brass, copper and titanium.
On the plastic side we run POM, PEEK, PC, ABS and HDPE. If you need a material not on the list, ask and we will confirm availability.
Thin sections are machined with light finishing passes and low clamping pressure, and we often leave a sacrificial web that is removed in a later operation.
If a wall is thinner than the process can hold, we say so during DFM review rather than shipping a part that springs after release.
Yes. An NDA is available on request, and file uploads are kept secure and confidential.
We do not share customer drawings or part designs with third parties.
Yes, on request. Every order gets a raw material check, in-process monitoring and a final inspection before shipment.
For critical dimensions we can supply measured values rather than a simple pass or fail.
Upload your file and we will come back with a quote, a manufacturability note and a process plan. No minimum order quantity, and every part is inspected before it ships.
12-hour quote100% inspectionNo MOQNDA on request
Trusted by engineers and manufacturers worldwide
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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