GreatLight machines custom precision CNC machining parts from one prototype to 10,000+ production runs. Tolerances to ±0.005 mm, finishes to Ra 0.2 μm, and 127 CNC machines under one roof in Dongguan and Singapore.
Most problems show up at assembly, not at the machine. Here is what buyers describe before they switch suppliers.
The first article measures fine. By part 300 the bore is 0.02 mm over. That gap forces rework, scrap and a conversation with your customer. It usually comes from tool wear left unchecked or a fixture that lets the part creep between operations.
When a supplier machines one face, then re-clamps to reach the other side, the datum shifts. You get a part that passes drawing dimensions but will not sit flat in the assembly jig. Every extra setup adds error, not just cost.
A prototype bead blasted to a soft matte arrives as a scratched, tool-marked production part. If the finish callout is vague, the shop picks the cheapest path. Cosmetic rejects at incoming inspection are expensive and slow the line down.
A low price on a simple part turns into change orders once the shop sees the deep pockets, thin walls or 0.4 mm corner radii. You need DFM feedback before the PO, not after the first cut.
We hold the datum, control the setup count and inspect against the drawing you sent.
Most tolerance loss happens between operations, not inside the cut. Our 16 simultaneous 5-axis centers machine five faces in one clamping, so bores, faces and bolt patterns stay in the same coordinate system. For parts that fit our 750 × 1,150 × 550 mm and 600 × 600 × 600 mm travels, that removes two or three re-clamps from the route.
We also run 12 four-axis mills and 16 mill-turn centers for parts that need both turning and milling. A mill-turn center finishes a shaft with cross holes and flats without moving it to a second machine. The Ø400 mm rotary table handles round work that would otherwise need a fixture.
Holding ±0.005 mm is a process question, not a machine spec. It needs stable temperature, sharp tooling changed on a schedule, and in-process checks rather than a single final measure. We monitor dimensions during the run and inspect 100% before shipment, with raw material check at receiving and reports on request.
Surface finish follows the same logic. As-machined faces land at Ra 1.6–3.2 μm, high-finish parts at Ra 0.8–1.6 μm, and fine finishes reach Ra 0.2–0.8 μm. If a face is cosmetic, say so on the drawing. That lets us pick the right cutter and pass before the part is made, not after it is rejected.
Pick by geometry and tolerance, not by machine name.
| Part feature | Recommended route | Why |
|---|---|---|
| Prismatic housing, 3–5 faces | 5-axis | One setup, datums stay aligned |
| Shaft with cross holes | Mill-turn | Turning and milling without re-clamp |
| Flat plate, 2 faces | 3-axis | Lower cost, simple fixturing |
| Round part under Ø400 mm | 4-axis + rotary table | Indexed faces, no special fixture |
| Thin wall under 1 mm | 5-axis, light passes | Less clamping stress, less chatter |
| Deep pocket, L/D over 5 | 3-axis with long reach tool | Controlled stepdown, good chip clear |
One purchase order covers machining, finishing and inspection.
Simultaneous five-face work for complex geometry and tight datums. Best for housings, brackets and parts with angled features.
Indexed rotary work for round and prismatic parts under Ø400 mm. Fewer fixtures than a 3-axis route.
Straightforward plates and blocks at the lowest cost per part. Good fit for flat parts with simple fixturing.
Milled and turned features on one part, including shafts, bushings and threaded components.
First articles for fit and function checks before you commit to a production route.
Anodizing, plating, powder coating, bead blasting, polishing and laser marking.
| Item | Range | Notes |
|---|---|---|
| Aluminium | 6061, 2024, 5052, 6063, 6082, 7075 | 6061-T6 is the common default |
| Stainless | 303, 304, 316L, 17-4PH, 440C | 303 for machinability, 316L for corrosion |
| Steel | 1018, 1045, 4130, 4140, 4340, A36 | Heat treatment available |
| Titanium and special | TA1, TA2, TC4, Inconel, magnesium | TC4 needs slower feeds |
| Plastics | ABS, PC, PMMA, POM, PA, PEEK, PP, HDPE | PEEK and POM hold tight tolerances |
| Maximum size | 4,000 mm | Larger travels: 4,000 × 400 × 150 mm |
| Anodizing | Clear, colour, hardcoat, conductive | Masking per drawing |
| Laser marking | Minimum character height 1.5 mm | Legible after anodizing |
The numbers that decide whether your schedule holds.
Three wholly-owned plants and 150 technicians across Dongguan and Singapore, so capacity does not depend on a single site.
Not just on the first article. In-process monitoring keeps dimensions stable across the run.
We review the drawing and return a quotation with manufacturability notes within 12 hours. Production can start within 24 hours.
From a single prototype to 10,000+ part runs on the same process, so scaling does not force a re-qualification.
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022. Reports available on request.
Below 2% across past orders. Parts ship in 3–5 days once production is released.
Housings and brackets with traceable inspection and IATF 16949 paperwork.
Small stainless and titanium components with burr-free edges and clean finishes.
End-effector plates and joint parts held to datum across multiple faces.
Replacement and new-build parts up to 4,000 mm, machined to the original drawing.
±0.005 mm is our standard production tolerance. That depends on the feature, the material and how the part is clamped.
Very deep pockets, thin walls under 1 mm, or long slender bores are harder. Send the drawing and we will tell you which dimensions we can hold and which need a design change.
STEP and IGES for 3D, plus a 2D drawing in PDF or DXF for tolerances, finishes and notes.
If you only have a 3D model, we can work from that and mark dimensions we assume are critical. The DFM report within 12 hours will flag anything unclear.
Yes. There is no minimum order quantity. We run single prototypes and 10,000+ part batches on the same equipment.
The process does not change between the two, so the dimensions you qualify on the prototype should repeat in the production run.
Aluminium 6061, 2024, 5052, 6063, 6082 and 7075; stainless 303, 304, 316L, 17-4PH and 440C; steels including 1018, 1045, 4130, 4140 and 4340; titanium TA1, TA2 and TC4; plus POM, PEEK, PC, ABS and HDPE.
Tell us the material on the drawing. If a substitute would machine better and meet the same function, we will say so in the quote.
Finishing runs under the same order. Anodizing, plating, powder coating, bead blasting, brushing, polishing and laser marking are all available.
For laser marking, keep character height at 1.5 mm or more so the text stays legible after anodizing. Send masking requirements with the drawing.
Every order gets 100% inspection before shipment: raw material check, in-process monitoring and a final inspection.
Inspection reports are available on request. If you need first article inspection to a specific format, note it on the PO so we build the report into the route.
Uploads are secure and treated as confidential. We will sign an NDA on request before you send files.
If your project needs it, ask for the NDA first and send the drawing after it is signed.
Quotation and DFM feedback come back within 12 hours. Production can start within 24 hours of release.
Standard parts ship in 3–5 days. Larger parts or multi-operation routes take longer, and the quote will state the schedule rather than leave it open.
Upload a STEP file and a 2D drawing. We return a price, a machining route and DFM notes. No minimum order quantity.
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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