01
The drawing passes, the first article does not
A shop quotes from a 2D PDF, misses a thin wall or a deep pocket, and the first article comes back out of tolerance. Tooling and inspection reports get redone. The schedule moves by a week.
Made to your drawing
Custom CNC Machining Parts
Upload a CAD file and we machine it. 127 CNC machines in Dongguan run prototypes and production runs from one piece to 10,000+, with free DFM feedback inside 12 hours.
±0.005 mm toleranceNo minimum order quantity100% inspection before shipmentISO 9001 / IATF 16949Quotes in 12 hoursParts ship in 3–5 days
127High-precision CNC machines
16Simultaneous 5-axis centers
±0.005 mmAchievable tolerance
99.99%Qualification rate
Where projects slip
Four problems that show up after the quote
02
Quotes that take longer than the parts
Three suppliers, five days, two answers. RFQs move between sales and planning because nobody checked the stock size against machine travel. Your build plan sits idle while you wait for a number.
03
Surface finish that reads different on the dock
The sample was bead blasted by hand, the batch was tumbled. Color and gloss drift, anodize lots do not match, and the assembly faces a rework loop that nobody budgeted for.
04
One late part holds the whole build
A single bracket misses its date and the subassembly waits. Expedited freight, rescheduled line time, and a customer asking for a recovery plan. The cost lands far above the part price.
How we run it
Machining built around the drawing, not the catalog
One engineer owns your file from DFM review to final inspection report.
Capability
Five-axis cutting for parts that need fewer setups
Complex geometry is where setup count decides cost and accuracy. Turning a part four times adds four chances to lose datum control. Our 16 simultaneous 5-axis machining centers cut angled faces, deep pockets and contoured surfaces in one or two setups, so the dimensions that matter stay tied to the same reference.
Work envelope covers most of what engineers send us: 4,000 × 400 × 150 mm on the large traveling machines, 750 × 1,150 × 550 mm on the medium frames, and a Ø400 mm rotary table for round and prismatic parts that need radial features.
- 116 simultaneous 5-axis centersAngled holes, undercuts and contoured faces in one fixturing.
- 2±0.005 mmHeld on critical features, verified on a CMM before shipment.
- 34,000 mm maximum sizeLong rails and plates machined without splicing.
Capability
Turning, milling and finishing under one roof
Shafts, bushings, fittings and threaded parts come off 16 mill-turn centers that combine turning and milling in one program. That removes the handoff between a lathe shop and a mill shop, which is where concentricity and thread alignment usually drift. Materials run from 6061-T6 and 7075 aluminium to 303, 316L and 17-4PH stainless, plus titanium and engineering plastics such as POM and PEEK.
Finishing stays in-house as well. Anodizing, plating, powder coating, bead blasting, brushing and laser marking are scheduled with the machining order, so the cosmetic and functional surfaces are completed before the parts ship rather than after a second shipment.
- 116 mill-turn centersTurned features and milled flats in a single program.
- 2In-house finishingAnodize, plating, blasting, laser marking on one purchase order.
- 3No minimum order quantityOne prototype or a 10,000-piece run on the same process sheet.
Selection
Which process fits your part
Use the geometry and quantity to pick the route before quoting.
| Part condition | Recommended route | Why |
|---|---|---|
| Prismatic part, tight true position | 5-axis milling | Angled faces cut in one setup |
| Shaft with cross holes | Mill-turn center | Turning and milling share one datum |
| Flat plate, large outline | 3-axis + 4-axis mill | 4,000 mm travel, low setup cost |
| Thin-wall housing | Vacuum casting or 5-axis | Support during cutting, less deflection |
| Prototype in 2 days | 3-axis + finishing | Shortest programming and setup path |
Services
What we machine and how we finish it
01
5 Axis CNC Machining
Simultaneous five-axis cutting for contoured surfaces, angled holes and parts that would otherwise need four setups. Sixteen centers available.
02
CNC Milling & Turning
Three-, four- and five-axis mills plus mill-turn centers. Prismatic parts, shafts, threads and bores held to ±0.005 mm.
03
Rapid Prototyping
One-off and low-volume parts for fit checks and design reviews. No minimum order quantity, production can start within 24 hours.
04
Sheet Metal Fabrication
Brackets, enclosures and panels from aluminium, stainless and steel, paired with machining when a part mixes both processes.
05
Part Surface Finishing
Anodizing, electroless nickel, zinc, silver and gold plating, powder coating, black oxide, blasting, brushing, polishing and laser marking.
06
Metal Die Casting
ADC12 aluminium and magnesium castings for housings and frames, with CNC finishing on sealing faces and mounting holes.
Scope
Equipment and process limits
Numbers your engineer can check a drawing against.
| Item | Specification | Notes |
|---|---|---|
| Tolerance | ±0.005 mm (±0.0002 in) | Critical features, CMM verified |
| Surface finish | Ra 0.2–0.8 μm fine | Ra 1.6–3.2 μm as machined |
| Largest travel | 4,000 × 400 × 150 mm | Long rails and base plates |
| Medium travel | 750 × 1,150 × 550 mm | Enclosures and manifolds |
| Rotary table | Ø400 mm | Radial holes and slots |
| Materials | 6061, 316L, 17-4PH, TC4 | Plus POM, PEEK, ABS, PC |
| Laser marking | 1.5 mm minimum character | Serial and lot codes |
| Inspection | 100% before shipment | Reports on request |
Why GreatLight
What the numbers look like on our side
15Y
Machining since 2011
Fifteen years of production work out of Dongguan, with a second plant in Singapore for regional delivery.
12H
Quote and DFM in 12 hours
A mechanical engineer reviews your CAD file and returns pricing with manufacturability notes, not just a number.
±0.005
Tolerance held on the feature that matters
We ask which dimensions are critical before quoting, then inspect those features on the CMM and report the values.
4
Audited management systems
Quality, automotive, medical and information security systems are certified and audited, which matters when your customer asks for evidence.
0
No minimum order quantity
The same process sheet covers one prototype and a 10,000-piece run, so a design change does not force a new supplier.
NDA
Files stay confidential
Uploads are handled as confidential, and we sign an NDA on request before your drawings reach the shop floor.
Delivery
What tight industries require, and what we hand over
Aerospace brackets
Thin ribs machined on 5-axis, anodized and laser marked with lot codes.
- ±0.005 mm
- Ra 0.8 μm
- 100% CMM
Medical instrument housings
316L and 17-4PH bodies with electropolished bores and documented inspection.
- ISO 13485
- Ra 0.2–0.8 μm
- Material certs
Automotive and EV fixtures
Aluminium fixtures and bushings for line builds, held to drawing across repeat orders.
- IATF 16949
- ±0.0002 in
- 3–5 day ship
Robot and automation parts
Mill-turn shafts and end-effector plates with matched bores and threaded interfaces.
- 16 mill-turn
- Ø400 mm table
- No MOQ
FAQs
Questions engineers ask before sending a file
What file formats do you need for a quote?
STEP and IGES cover most machined parts because they carry solid geometry. Send native CAD (SolidWorks, Fusion, Inventor) when you want us to check a feature tree. Add a 2D drawing or PDF with tolerances, datums and finish callouts, since a 3D model alone does not define which dimensions are critical.
Which tolerances can you actually hold?
±0.005 mm (±0.0002 in) is achievable on features we agree on before quoting, typically bores, bores-to-bore relationships and mating faces. General surfaces usually run looser, and that keeps the price down. Tell us which dimensions affect function and we will inspect and report those values.
How fast is a quote and how fast are parts?
Quotation with free DFM analysis comes back within 12 hours. Production can start within 24 hours of your approval, and parts typically ship in 3–5 days, depending on quantity, material and finishing. Historical late-delivery probability is below 2%.
Is there a minimum order quantity?
No. We run single prototypes and production runs of 10,000 pieces and more on the same process sheet. Prototype pricing is higher per part because programming and fixturing are spread over one piece, and that cost does not repeat on the production run.
When is 5-axis machining worth the extra cost?
It pays off when a part has angled holes, contoured faces or undercuts, or when repositioning would break datum control. A simple prismatic part with features on two faces is usually cheaper on a 3-axis machine. Send the model and we will say which route fits.
How do you control surface finish and color match?
We agree the finish callout in Ra and the process before machining, then keep anodize and plating lots together for one order. Bead blasting, tumbling and brushing are specified by media and time. Laser marking holds a minimum character height of 1.5 mm so codes stay readable.
What inspection documentation comes with the parts?
Incoming material is checked, dimensions are monitored during cutting, and every part is inspected before shipment. Reports are provided on request, including dimensional results on agreed critical features and material certificates for the lot used.
How do you protect our drawings?
Uploads are handled as confidential and stay with the engineering and production staff assigned to your order. We sign a non-disclosure agreement on request before files reach the shop floor. Our information security management system is certified to ISO 27001:2022.
Send a CAD file and get a real answer
A mechanical engineer reviews your model, returns pricing with DFM notes inside 12 hours, and quotes one piece or ten thousand on the same process sheet.
12-hour quote100% inspectionNo minimum order quantityNDA on request
