GreatLight · Founded 2011 · ISO 9001 · IATF 16949 · AS9100D
Custom CNC Machining Services for Complex Parts
From a single prototype to mass production — ±0.005 mm accuracy in a single setup, parts up to 4,000 mm, and 127 CNC machines in-house at our Dongguan plant.
Capability & capacity
One plant, 127 machines, one quality system
Our 7,600 m² smart manufacturing plant in Dongguan runs 127 precision machines — high-precision 3-, 4- and 5-axis machining centers, lathes, grinders and EDM — backed by CMM inspection and an ISO 9001 / IATF 16949 / AS9100D quality framework. Parts up to 4,000 mm, in titanium, aerospace aluminium, stainless, Inconel and engineering plastics.
- ±0.005 mm accuracy in a single setup; tighter on selected features
- Max processing size 4,000 mm · surface finish Ra 0.2 μm achievable
- 127 CNC machines in-house, one quality system
- DFM feedback with every quote — free, specific, and honest
Solutions
Four ways to manufacture with GreatLight
Whether you need one complex part or a production program, the same engineering team, machines and quality system carry your project from drawing to delivery.
Custom CNC Machining
Your drawing, our process — 3-, 4- and 5-axis machining for complex, high-tolerance parts.
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Contract Manufacturing
A full manufacturing partner behind your brand — engineering, production, inspection and delivery.
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Prototype to Mass Production
From one prototype to 100,000+ parts — repeatable fixtures, lights-out cells and IATF 16949 documentation.
Get a Quote →Capabilities
Our CNC machining services
Nine core processes under one roof — matched to your geometry, material and volume by engineers who quote what they can actually hold.
5-Axis CNC Machining
Simultaneous 5-axis contouring for impellers, housings and thin-wall parts — complex geometry in one setup.
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4-Axis CNC Machining
Multi-face work held in one rotary setup — bores, flats and patterns cut without re-fixturing.
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CNC Milling
3-, 4- and 5-axis milling for prismatic parts, molds and fixtures — parts up to 4,000 mm.
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CNC Turning
Turning and mill-turn for shafts, fittings and connectors — 0.005 mm runout on critical parts.
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CNC Cutting
Laser, waterjet and precision saw cutting for blanks, panels and profiles with clean edges.
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CNC Prototyping
Functional prototypes in 3–5 days — in the same material and process your production will use.
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CNC Engraving
Precision engraving for part numbers, logos and functional markings on any machined surface.
Explore CNC Engraving
CNC Bending
Press-brake bending for brackets, enclosures and frames — ±0.5° on repeat batches.
Explore CNC Bending
EDM Machining
Wire and sinker EDM for hardened tooling, sharp internal corners and fine features.
Explore EDM MachiningProcess
From drawing to delivered parts
A quote in 12 hours, prototypes in 3–5 days, and production programs scheduled to your demand.
Upload your drawing
Send STEP/IGES files or 2D drawings through the quote form — no account needed.
DFM review & quote
An engineer confirms tolerances and manufacturability, then quotes within 12 hours.
Machining & inspection
Parts run on matched machines and are CMM-inspected against your drawing.
Delivery worldwide
Express, air or sea freight from Shenzhen/Hong Kong, with full documentation.
Industries
Custom CNC machined parts for every industry
Robotics & Automation
Joint housings, actuator bodies and structural links
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Automotive & EV
Powertrain, battery and sensor components
Explore Automotive & EV
Aerospace
Fittings, impellers and flight-critical parts
Explore Aerospace
Medical & Healthcare
Instruments, implants and device housings
Explore Medical & Healthcare
Semiconductor
Chamber, stage and wafer-handling parts
Explore Semiconductor
Energy
Wind, solar, valve and battery components
Explore Energy
Sensors
Housings, diaphragms and connector bodies
Explore Sensors
Test & Measurement
Instrument frames, probes and fixtures
Explore Test & Measurement
Optical & Photonics
Lens mounts and optomechanical parts
Explore Optical & Photonics
Communications & Electronics
RF housings, heat sinks and connectors
Explore Communications & Electronics
Industrial Machinery
Shafts, gears, manifolds and frames
Explore Industrial MachineryAll 11 industries
See how we support robotics, mobility, aerospace, medical, energy, optics and more.
Browse industriesWhy choose GreatLight
Precision is a process, not a promise
±0.005 mm in one setup
5-axis machining keeps compound features in a single datum — no stacked re-fixturing errors.
127 machines in-house
High-precision 3-, 4- and 5-axis centers, lathes, grinders and EDM — one supplier for the whole job.
Engineering, not order-taking
DFM feedback with every quote: we challenge tolerances and materials before metal is cut.
3–5 day prototypes
Fast starts on standard materials, with production-grade processes carried into series runs.
Gallery
Recently off our machines
Case studies
Programs that prove the process
Aerospace
Thin-walled titanium impeller — 0.008 mm profile tolerance
Delivered in three weeks with zero rework.
Read case studyLatest from the blog
Machining knowledge, shared
5-Axis vs 3-Axis CNC Machining: When the Extra Axes Pay for Themselves
Setups, tolerances, surface finish — and the cost math most buyers miss.
How to Choose a CNC Machining Supplier: 10 Questions That Predict Quality
The questions that separate engineered suppliers from order-takers.
Designing for 5-Axis Machining: A DFM Checklist for Complex Parts
Datum strategy, wall thickness, tool access and what to send for quoting.
FAQ
Questions buyers ask us first
What is your minimum order quantity?
One piece. We regularly run single prototypes alongside production programs — pricing scales with volume, but there is no minimum to start.
How fast can I receive prototype parts?
Simple machined prototypes ship in 3–5 working days after drawing release; complex 5-axis parts typically run 7–15 days depending on material and finishing.
What tolerances can you hold?
±0.005 mm accuracy in a single setup on suited geometry, with tighter tolerances evaluated per feature. We confirm what is realistic at quoting — before you commit.
How do I get a quote?
Send 2D drawings or 3D files (STEP, IGES, X_T, STL) through the quote form or to [email protected]. Engineering reviews every file and replies within 12 hours with price, lead time and DFM notes.
Ready to machine your complex part?
Upload your CAD files and our engineering team will come back with a quote, lead time and free DFM report within 12 hours.