Custom CNC Machined Parts for Prototype and Production
Custom CNC machined parts in aluminium, stainless, titanium and plastics, with DFM review and first-article inspection for 1–10,000 piece programmes.
CNC machined parts are metal or plastic components produced by subtractive cutting on computer-controlled milling and turning centres. Xinyuanmu Precision machines custom parts from customer drawings across aluminium, stainless steel, titanium and engineering plastics, targeting ±0.05 mm on general dimensions and tighter bands on critical features, with a written DFM review before every quote and first-article inspection on new part numbers.
Scope: what this product page covers
This page covers milled and mill-turn parts with prismatic geometry: plates, brackets, manifolds, housings, base plates, heat sinks and fixtures. Parts that are primarily rotational belong on the turned components page. We machine to the tolerance stated on your drawing; the bands below are typical achievable targets, confirmed per part at first article.
Specifications
| Part size range | Small to mid-format envelopes (confirm per drawing) |
|---|---|
| Tolerance (general) | ±0.05 mm typical |
| Tolerance (critical features) | Tighter bands available; confirmed by FAI |
| Surface roughness | Ra 0.4 µm achievable with finishing pass |
| Order quantity | 1 – 10,000 units per programme |
| Lead time | Agreed per quote, from prototype to small-batch |
| Axis capability | 3-axis, 4-axis and 5-axis milling |
| Inspection | First-article inspection + material certificate |
Materials
- Aluminium 6061-T6, 7075-T6
- Stainless 304, 316L, 17-4PH, SUS440C
- Titanium Grade 5 (Ti-6Al-4V)
- Brass and copper alloys
- Engineering plastics: PEEK, POM, PC
Manufacturing process
- Drawing and DFM review Every order starts with a manufacturability review. We return a written note on features that drive cost — deep pockets, tight internal corners, thin walls and tolerances tighter than the process holds repeatably — before any price is committed.
- Material procurement Material is sourced against the specified grade with mill certificates. Heat-number traceability is available on request so a material problem can be isolated to specific parts.
- Programming and setup Toolpaths are verified before the first cut. Fixtures are chosen for the batch size — soft jaws for low volume, dedicated fixtures for repeat production.
- Machining Roughing and finishing are separated to control stress and thermal movement. Critical features are finished in a single setup wherever geometry allows, because repositioning is the main source of tolerance stack-up.
- Inspection and documentation First-article inspection against the drawing accompanies new part numbers. Dimensional reports and material certificates are provided per agreement.
CNC Machined Precision Parts in production
Typical applications
- Semiconductor equipment structural and support parts
- Photonics and optical-mount components
- Medical device instrument bodies and equipment parts
- High-reliability industrial and instrumentation hardware
- Robotics and automation brackets and fixtures
- Research and NPI prototype hardware
Quality and documentation
- First-article inspection on new part numbers
- Material certificates with heat-number traceability on request
- Dimensional inspection reports per lot
- Written DFM review on every quote
- NDA signed before any customer drawing is exchanged
What we do not do
We do not perform forging, casting, heat treatment, welding or grinding in-house; these operations are sourced to audited subcontractors under our incoming-inspection gate. We do not claim AS9100, ISO 13485 or ISO 9001 certifications that are not yet formally held by Xinyuanmu. Medical work is limited to non-implantable, non-patient-contact instrument and equipment components until a validated quality system is in place. Defense, aerospace, nuclear and controlled-semiconductor projects are reviewed through our compliance gate before any technical data is exchanged — we do not auto-quote or auto-source controlled drawings.
Technical questions
What is the minimum order quantity for CNC machined parts?
One piece. There is no tooling charge on machined work, so a prototype and a production run use the same process — only the per-unit price changes with volume.
How tight a tolerance can you hold?
General dimensions are typically held to ±0.05 mm. Tighter bands on critical features are confirmed by first-article inspection against your drawing rather than quoted as a blanket number, because achievable tolerance depends on feature size, material and setup count.
Do you provide material certificates?
Yes. Mill test reports are available with shipments, and heat-number traceability can be provided on request. Dimensional inspection reports accompany first-article parts.
What file formats do you accept?
STEP (.stp/.step), IGES, X_T, SolidWorks, and a 2D PDF or DXF drawing with tolerances and GD&T. STEP plus a PDF drawing is the most reliable combination.
Adjacent products and capabilities
CNC Turned Components
CNC turned components are rotationally symmetric parts produced on lathes where the workpiece spins and a stationary or driven tool removes material. Xinyuanmu Precision turns shafts, pins, bushings, fittings and threaded parts with live tooling for cross-drilling and milling in the same setup, targeting ±0.05 mm on diameters with tighter bands confirmed by inspection, from a single prototype to small-batch production..
View productSemiconductor Equipment Components
Semiconductor equipment components are the structural, vacuum and optical-mounting parts inside wafer-handling, inspection and process tools. Xinyuanmu Precision machines these parts from aluminium, stainless and specialty alloys to tight tolerances, with first-article inspection, material traceability and clean handling appropriate to the tool environment..
View productPhotonics & Optical Components
Photonics and optical components are the mounts, housings and structural parts that hold lenses, fibres and optical sub-assemblies in alignment. Xinyuanmu Precision machines these parts from dimensionally stable materials to tight tolerances, with surface finish and clean handling controlled so that alignment and stray-light performance are preserved..
View productInspection & Documentation
First-article inspection, material certificates and dimensional reports for new part numbers.
Inspection capabilitySend drawings, get a review and a quote
Send a STEP file and a 2D drawing. You get a fixed-price quotation with lead time and a written DFM note — no obligation, and no sales call unless you ask for one.