CUSTOM PARTS · PROTOTYPE TO PRODUCTION
CNC Milling
Services
3, 4 and 5-axis CNC milling for custom metal and plastic parts. Get housings, brackets, fixtures and complex components made to your drawing.
Prototype, small-batch and production orders, with material, finishing and inspection requirements reviewed together.
ISO 9001:2015Quality management · SGS certificate
Your files stay confidential. Optional NDA available ↗
CNC milling capabilities
Check the machining route, part size and precision you need. Send your drawing to confirm what works for your component.
Machining routes
Selected around your part geometry.
3-axis milling
Faces, pockets, slots and holes. A practical route for plates, brackets and open housings.
4-axis milling
Rotary access to features around a part, with fewer manual repositioning steps where suitable.
5-axis milling
Tool orientation for angled faces and complex contours. The part review determines indexed or simultaneous machining.
Size & precision
Reference capabilities, reviewed for each part.
- Maximum part size
- 2,000 × 1,500 × 300 mmSubject to machine configuration and fixturing
- Tight linear tolerance
- Down to ±0.005 mmSelected features, after drawing review
- Minimum wall
- 0.8 mm metal · 1.5 mm plasticDepends on wall height and part rigidity
- Minimum feature
- 0.5 mmDepends on geometry and tool access
- As-machined roughness
- Ra 3.2 µm or betterSpecify functional surface requirements
Is your part a fit?
Send your model, drawing and quantity. We’ll review the machining requirements with your quote.
Material, geometry and finishing affect feasibility. The accepted drawing and quotation define the final requirements.
Custom CNC milled parts
From simple mounting plates to parts with pockets, angled faces and multiple machined features.
Housings & enclosures
Pockets, mating faces and threaded mounting holes. Specify sealing surfaces and cosmetic faces.
Brackets & mounting plates
Profiles, slots and hole patterns. Identify mounting fits, datums and positional tolerances.
Jigs, fixtures & tooling
Locating pockets, reference faces and wear areas. Specify hardness and dimensions that control positioning.
Manifolds & contoured parts
Intersecting passages, angled ports and 3D surfaces. Review access, internal burr removal and cleaning.
Materials for CNC milling
Choose a material family, then specify the grade, temper or condition required by your part.
Aluminum
6061 · 6082 · 7075
Lightweight housings, brackets and fixtures. Include temper and any anodizing requirements.
Stainless steel
303 · 304 · 316L
Components with specified corrosion or mechanical requirements. Include grade and surface treatment.
Carbon & alloy steel
C45 · 42CrMo4
Loaded components, fixtures and tooling. Specify stock condition, hardness and heat treatment.
Brass
CuZn39Pb3
Machined connectors and fittings. Specify alloy and any restriction on lead content.
Titanium
Grade 2 · Grade 5
Parts specifying titanium for the application. Include grade and documentation requirements.
Engineering plastics
ABS · PMMA · PC · PEEK · PP
Lightweight, insulating or functional plastic components. Include resin grade and operating conditions.
Choose a finish for your milled parts
Machining and surface finishing, reviewed together for the appearance, protection and fit your part needs.
Not sure which finish to specify?
Tell us how the part will be used. We’ll review the finish, material compatibility and final fits with your quote.
Include coating thickness, masking and any dimensions that must meet acceptance after finishing.
Quality checks for your machined parts
Support your sourcing decision with dimensional inspection, agreed quality documents and ISO 9001:2015 quality management.
Dimensional inspection
Identify critical sizes, fits, datums and hole positions. Agree measurement methods, including CMM checks where appropriate, and the required sampling scope.
Drawing and revision control
Provide the part number, revision, units and general tolerance standard. Confirm changes before a repeat order.
Material and inspection documents
Request material certificates, dimensional reports, traceability or first-article documentation before ordering so the scope can be agreed.
Final checks and packaging
Specify edge breaks, burr restrictions, surface condition, cleanliness and protection for sensitive faces or finished parts.
ISO 9001:2015 quality management
SGS certificate CN24/00004900
PROLEAN MFG (SHENZHEN) CO LTD
Certificate scope: production of hardware accessories. Stated validity: 5 Aug 2024–4 Aug 2027, subject to satisfactory surveillance.
Need a specific inspection report?
Tell us which dimensions, documents and acceptance criteria your purchasing or quality team requires.
CNC milling design guidelines
Review tool access, corners, walls and critical features before requesting a quote.
Five features to check
- Internal corners: rotating cutters leave radii. Allow a radius or relief where a mating square corner needs clearance.
- Deep pockets: long, slender cutters can deflect. Reduce depth or open access where function allows.
- Thin walls: avoid long unsupported sections; review clamping and distortion, especially after removing substantial stock.
- Holes & threads: specify diameter, depth, thread class and effective engagement. Identify burr-sensitive intersections.
- Critical tolerances: tighten functional fits and datum relationships selectively. Avoid applying the tightest value to all features.
How to order CNC milled parts
Four steps from your drawing to finished parts, with requirements agreed before production.
- 01
Send your drawing
Share your 3D model and PDF drawing, material, finish, quantity and delivery requirements.
- 02
Review the quote
Review manufacturability, price, inspection scope and the proposed schedule with our team.
- 03
Confirm & manufacture
Approve the quotation and drawing revision, including any prototype or first-article requirements.
- 04
Inspect & deliver
Inspection, documents, packaging and delivery follow your agreed order requirements.
What affects your quote?
Material, quantity, machining complexity, tolerances, finishing and inspection. Include prototype and production quantities to compare options.
Ready to quote your milled part?
Send your files and requirements for an engineering review.
Confidential file handling · Optional NDA available ↗
ENGINEERING & PURCHASING
CNC milling
questions, answered.
Practical details for sourcing a custom machined part.
What does your CNC milling service include?
Custom milling of metal and engineering-plastic components, with material, surface finishing and inspection requirements reviewed together. Send the drawing, quantities and delivery requirements so the complete scope can be quoted.
Should I choose 3-axis, 4-axis or 5-axis milling?
Start with the geometry. Accessible faces and pockets often suit 3-axis machining. Rotary access can help with features on several sides, while 5-axis tool orientation can help with angled features and contours. The engineering review determines the route; more axes do not automatically mean better accuracy.
What tolerances can you achieve?
Tight linear tolerances down to ±0.005 mm are reviewed on selected features. Feasibility depends on material, feature size, geometry, workholding, finishing and measurement. Identify the critical dimensions; the approved drawing and quotation define acceptance.
Can you mill large parts and thin walls?
The reference envelope is up to 2,000 × 1,500 × 300 mm, with reference walls of 0.8 mm for metals and 1.5 mm for plastics. These are not combined guarantees. Send the model so access, stiffness, clamping and the selected machine configuration can be checked.
Do you offer aluminum and plastic CNC milling?
Yes. We review aluminum and engineering-plastic milling, alongside stainless steel, steel, brass and titanium. Specify the exact alloy or resin grade, temper or condition, finish and documentation requirements; availability is confirmed in the quote.
Can I order prototypes and small production batches?
Yes. Provide prototype, pilot and production quantities in your request. Setup allocation, stock availability, cutting time, finishing and inspection affect the unit price and schedule for each quantity.
What files do you need for an online milling quote?
A STEP or IGES model and dimensioned PDF drawing are a useful starting point. Include part revision, material, quantity, finish, critical tolerances, required date and destination. Use the quote page for actual file submission; ask the team about alternative formats or an NDA.
How long does CNC milling take?
Lead time depends on geometry, material availability, quantity, secondary operations and inspection. Include the required date and destination. The quotation confirms the proposed production and delivery schedule; urgent work requires a project review.
Can I request inspection reports and material certificates?
State the required document type, traceability, critical dimensions, sampling and any first-article requirement before ordering. Documentation and any additional inspection must be included in the agreed scope.
How is CNC milling different from CNC turning?
Milling uses a rotating cutting tool and is well suited to faces, pockets and non-rotational contours. Turning rotates the workpiece and is well suited to cylindrical features. A component with both feature types may benefit from turn-milling or multiple operations.
YOUR NEXT CNC MILLING PROJECT
Get a quote for
your CNC milled parts.
Send your model and drawing with material, quantity and finish requirements. We’ll review the part and prepare a quotation.
Your files stay confidential. Optional NDA available ↗