01
Do your gears bind at the mesh?
A shaft cut to ±0.1 mm and a bore cut to the same loose spec stack up until the pair jams or rattles. We hold the bearing seat tighter than the rest of the part, so the fit stays a fit after anodizing.
CNC machining service
Mechanical Parts Dreamlight Valley CNC Machining
Send a model or a sketch. We machine mechanical parts for Dreamlight Valley style builds, from a single gear to a 10,000 part run, and ship production parts in 3–5 days.
±0.005 mm toleranceNo minimum order16 five-axis centersISO 9001 certified12-hour DFM report
±0.005 mmAchievable tolerance
127High-precision CNC machines
3–5 daysProduction part shipping
99.99%Qualification rate
Where parts go wrong
Four problems we see in replica and prop-grade hardware
02
Does your bracket crack at the first bolt?
Sharp internal corners concentrate stress. A 0.5 mm corner radius and the right alloy often fix it. Cutting the same geometry from 6061 instead of 7075 is a common mistake on load-bearing brackets.
03
Is the finish blotchy on the visible face?
Tool marks left before anodizing show through the coating. We cut the cosmetic face last, with a lighter finishing pass, so the surface reads uniform instead of patchy under light.
04
Are you waiting on a one-off part?
A prop builder needs one housing this week. Some shops quote a 4-week tooling job. We run one-offs and 10,000 part runs on the same machines, with no minimum order quantity.
How we machine it
Machining mechanical parts to your drawing, not to a guess
Three capabilities that decide whether a mechanical assembly fits on the first try
Turning and milling
Shafts, hubs and gear blanks from bar stock
Turned geometry is where concentricity lives. Our mill-turn centers cut a shaft and its bearing journals in one setup, so runout stays tied to one spindle rather than to a stack of re-clampings. For parts with cross holes or flats, we mill them on the same machine instead of moving the part to a second fixture.
Aluminium 6061 and 7075, stainless 303 and 17-4PH, brass C36000 and titanium Ti-6Al-4V all run on these machines. If a part is a display piece, 6061 with clear anodizing is usually enough. If it takes a load, 7075 or 17-4PH is the better starting point, and we will say so during the DFM check.
- 1One setup for coaxial featuresRunout stays inside ±0.005 mm instead of growing with each re-clamp.
- 2Bar stock to Ø400 mmRotary table capacity covers hub-and-disc style parts.
- 3Threads cut, not tapped by handPitch diameter stays consistent across a batch.
Five-axis work
Housings and brackets with faces that meet at angles
A housing with four mounting faces and a bore at 30° is a fixture problem before it is a cutting problem. On a simultaneous 5-axis center, the tool reaches the angled face without the part being repositioned three times. Fewer setups means fewer datums, and fewer datums means the hole pattern actually lines up with the bore.
We machine 16 simultaneous 5-axis centers. The largest travel is 4,000 × 400 × 150 mm for long parts, with 750 × 1,150 × 550 mm and 600 × 600 × 600 mm cells for mid-size housings. Thin walls are the limit here: below about 1 mm in aluminium, chatter becomes the controlling factor, and we will tell you when a wall should be thickened instead of chased.
- 1Angled faces in one setupNo re-fixturing between the bore and the bolt pattern.
- 24,000 mm maximum lengthLong rails and frame members stay on one machine.
- 3Radiused internal cornersCorners get a defined radius, which removes a stress riser.
Choose by part family
Which process fits your mechanical part
Match the geometry to the machine before you commit to a drawing
| Part family | Typical process | What to watch |
|---|---|---|
| Gear blanks, hubs, spacers | CNC turning or mill-turn | Concentricity between bore and outer diameter |
| Shafts with cross holes | Mill-turn, one setup | Runout after the cross hole is drilled |
| Angled housings | Simultaneous 5-axis | Wall thickness against chatter |
| Long rails and frames | 5-axis, 4,000 mm travel | Straightness over the full length |
| Thin covers and plates | 3-axis with vacuum fixture | Bowing after the part is released |
| Small brackets, high quantity | 4-axis with tombstone fixture | Cycle time per part across the batch |
What we run
Machining and finishing services for mechanical parts
01
5 Axis CNC Machining
Simultaneous five-axis cutting for angled faces, undercuts and contoured housings. One setup replaces three on a prismatic part with compound angles.
02
CNC Milling & Turning
Three and four-axis milling plus mill-turn work for shafts, hubs, plates and brackets. Tight bores and bearing seats are cut on the same machine as the outside profile.
03
Rapid Prototyping
One-off mechanical parts for fit checks and display builds. Same tolerances as production, so a prototype that fits will still fit when the run starts.
04
Surface Finishing
Anodizing, plating, powder coating, bead blasting and polishing. Cosmetic faces are cut last so the coating does not amplify old tool marks.
05
Sheet Metal Fabrication
Brackets, panels and enclosures when a milled part would waste material. Good for large flat covers that would distort on a mill.
06
Custom 3D Printing
Non-structural shells, mockups and jigs. Use it to check form before cutting metal, not for parts that carry a load.
Capability range
Machines, sizes and inspection in one view
| Item | Range | Notes |
|---|---|---|
| Machines on the floor | 127 high-precision CNC | 16 simultaneous 5-axis centers |
| Maximum part size | 4,000 mm | Long rails and frame members |
| Achievable tolerance | ±0.005 mm | ±0.0002 in on critical features |
| As-machined finish | Ra 1.6–3.2 μm | Standard milled surface |
| Fine finish | Ra 0.2–0.8 μm | Where a seal or bearing runs |
| Inspection | 100% before shipment | Reports on request |
| Order size | One part to 10,000+ | No minimum order quantity |
| Quote turnaround | 12 hours | Includes a free DFM analysis |
Why GreatLight
What the numbers say
15Y
Machining since 2011
Three wholly-owned plants in Dongguan and Singapore, 7,600 m² of floor space, 150 technicians on the machines and the inspection benches.
±0.005
Millimeters
Tolerance on critical features. We tell you which dimensions actually need it, because tightening every callout on a drawing adds cost without adding function.
24H
To production start
Quotation and free DFM analysis land within 12 hours. Production can begin the next day once the drawing is released.
4
Quality certifications
ISO 9001:2015, IATF 16949:2016, ISO 13485:2016 and ISO 27001:2022 cover quality, automotive, medical and data handling.
100%
Inspection before shipment
Raw material check, in-process monitoring and final inspection. Dimensional reports are available on request.
2%
Historical late-delivery rate
Below 2% across past orders. We quote dates we can hold instead of dates that win the order.
7,600 m²Manufacturing space
150Technicians
16Five-axis centers
12 hoursQuote and DFM report
Industry fit
What each sector demands, and what we deliver
Robotics and automation
Joint housings and link arms need bores that stay coaxial after assembly. Five-axis cutting keeps the bore and the mounting pattern on one datum.
- ±0.005 mm
- One setup
- 16 five-axis centers
Automotive and EV
Brackets and housings must survive vibration and plating. IATF 16949:2016 process control applies, and surface treatment is planned before the first cut.
- IATF 16949
- Ra 0.8–1.6 μm
- Batch traceability
Low-volume builds
Display pieces and short production runs ship in 3–5 days with no minimum order quantity, so a one-off housing and a 10,000 part run use the same process.
- One part to 10,000+
- 3–5 days
- 100% inspection
FAQs
Questions engineers ask before releasing a drawing
What tolerance can you actually hold on a mechanical part?
We work to ±0.005 mm (±0.0002 in) on critical features such as bearing seats, bores and mating faces. Not every dimension on a drawing needs that. We mark the ones that matter during the DFM check and leave the rest at a standard milled tolerance, which keeps the part affordable without affecting how it fits.
Which material should I pick for a load-bearing bracket?
Aluminium 7075 or stainless 17-4PH if the bracket carries a real load. Aluminium 6061 is fine for light brackets and display parts, and it anodizes cleanly. Brass C36000 machines fast and takes a polish, which suits visible hardware. Send the load case and we will tell you when a cheaper alloy is enough.
Can you machine a single part for a replica build?
Yes. There is no minimum order quantity, so one part or one set is a normal order. One-off parts run on the same machines as production work, so the tolerances do not change because the quantity is small. Production parts typically ship in 3–5 days.
How do you stop thin walls from chattering?
Thin walls are a stiffness problem, not a feeds-and-speeds problem. We support the wall during cutting, take lighter finishing passes, and tell you when a wall below roughly 1 mm in aluminium needs a rib or a thicker section. Chasing a wall that thin usually adds cost without holding the dimension.
What surface finish will my part arrive with?
Standard milled and turned parts come at Ra 1.6–3.2 μm. Functional surfaces such as seal and bearing seats are cut to Ra 0.8–1.6 μm, and where a surface must seal, we can reach Ra 0.2–0.8 μm. Cosmetic faces are cut last so anodizing does not reveal old tool marks.
How fast is a quote, and how fast is a part?
Quotation and a free DFM analysis come back within 12 hours. Production can start within 24 hours after the drawing is released, and parts ship in 3–5 days. We quote delivery dates we can hold; our historical late-delivery rate is below 2%.
Is my design kept confidential?
Uploads are handled as confidential, and we sign an NDA on request before you send files. Our ISO 27001:2022 certification covers how data is stored and who can access it. You can share a simplified model first if you prefer to release the full drawing later.
What inspection do I get with the parts?
Every order is inspected 100% before shipment, covering raw material, in-process dimensions and the final part. Dimensional reports are available on request. If a feature is critical, say so on the drawing and it goes on the inspection list instead of being checked as a routine dimension.
Send the drawing and get a machining plan
Upload a STEP file, a sketch or a photo of the broken part. We reply with a quote and a DFM note inside 12 hours, and one prototype is a valid order.
12-hour quoteNo minimum order100% inspectionNDA on request
