Precision CNC Machining Services in China
HC-Mold machines custom metal and plastic parts on 50+ CNC machines in Chang'an, Dongguan, from a single prototype to repeat production lots. We hold tolerances to 0.005 mm, offer 3-, 4- and 5-axis milling plus CNC and Swiss-type turning, and ship every order with a 3D measurement report.
CNC machining capabilities
- Machines
- 50+ CNC machines: 3-, 4- and 5-axis milling, CNC turning, Swiss-type turning
- Tolerance
- To 0.005 mm, depending on feature, material and part size
- Surface finish
- As machined to Ra 0.4 µm
- Materials
- 50+ metals and plastics, including aluminum, stainless steel, steel, brass, copper, titanium, POM and PEEK
- Quantity
- From 1 piece; prototype, bridge and production lots
- Lead time
- Prototypes in 3–5 days; production typically 5–10 days
- Finishing
- Anodizing, plating, powder coating, bead blasting, passivation, laser marking
- Quality
- ISO 9001:2015; 3D dimensional measurement report with every order
What to send for a CNC quote
- 3D files (STEP, IGES or SolidWorks) and a 2D PDF with tolerances and threads
- Material grade, surface finish and color
- Quantity per order and expected annual volume
- Prototype or production, and the date you need parts
We sign an NDA before any file review. Complete packages get a reply within 12 hours and a quote within 24 hours. See the CNC machining RFQ checklist.
CNC machining services
The machine and set-up are chosen in the DFM review to suit the geometry, tolerance and quantity, so you pay for 5-axis time only where the part needs it.
3-axis CNC milling
Plates, brackets, blocks, housings and fixtures with pockets, slots and drilled or tapped holes. The most economical route for prismatic parts.
4- and 5-axis CNC milling
Complex shapes, angled holes and features on several faces in one set-up, which improves accuracy between features. See 5-axis CNC machining.
CNC turning services
Shafts, pins, bushings, fittings and round housings on CNC lathes, with milled flats, cross holes and threads added where needed.
Swiss-type turning
Small, long and slender turned parts held to tight tolerances, such as pins, connectors and precision fasteners.
CNC prototype machining
Functional prototypes in the production metal or plastic in 3–5 days, from one piece. See rapid prototyping.
Low-volume and production machining
Repeat lots on documented programs and fixtures, with in-process checks and a measurement report for every shipment.
CNC machining materials
We machine more than 50 materials. The common choices are below; send the required properties if you have not chosen a grade.
| Material | Common grades | Typical parts |
|---|---|---|
| Aluminum | 6061-T6, 7075-T6, 5052 | Housings, enclosures, brackets, heat sinks, fixtures |
| Stainless steel | 304, 316 | Manifolds, shafts, medical and food-contact parts |
| Steel and tool steel | Carbon and alloy steels, tool steels | Gears, shafts, wear parts, tooling components |
| Brass and copper | Free-cutting brass, copper | Fittings, connectors, electrical and decorative parts |
| Titanium | On request | Lightweight, high-strength and corrosion-resistant parts |
| Engineering plastics | POM (Delrin), PA (nylon), ABS, PC, PEEK | Gears, insulators, wear pads, prototype housings |
Aluminum alloys cut fastest; stainless steel and titanium cut more slowly and cost more to machine. More detail: CNC aluminum machining and anodizing
Tolerances
Standard dimensions are machined to a general tolerance such as ISO 2768 medium unless the drawing says otherwise. Critical features can be held to 0.005 mm, depending on the feature, material and part size. Tighter tolerances add machine and inspection time, so specify them only where fit, sealing or alignment depends on them. Read CNC machining tolerances explained.
Surface finishes
As-machined surfaces down to Ra 0.4 µm, plus bead blasting, Type II and hard anodizing, plating, powder coating, passivation, polishing and laser marking. Finishes are quoted with the machining so parts arrive ready to assemble. See finishing and sub-assembly and the surface roughness chart.
Examples of CNC machined parts
Parts of the type we machine. Full list in the product catalog.
3-Axis CNC Milling of Aluminum Parts
Precision Watch Movement Plates and Gears
Brass Lighter Cases, CNC Turned and Machined
Molded Rubber Parts: Bellows, Boots and Grommets
Vehicle Concept Body Prototype
Custom CNC Machined Parts in Aluminum, Steel, Brass and PEEK
CNC Milled and Turned Metal and Plastic Parts
Custom CNC Machining Service for Plastic and Metal Parts
Perforated Sheet Metal Drum with Brass Finish
5-Axis Micro Milling of Dental Crowns
CNC Machined Stainless Steel Hydraulic Manifold
Precision Machined Aluminum Housing
Coffee Maker Housing and Plastic Parts
Smartphone Housing Prototype in Aluminum
Motorcycle Helmet Shell Prototype
CNC Machined Plastic Parts in POM, Nylon and ABS
Aluminum Enclosure for a UV Lamp Module
Silicone Molded Geometric Planters
LED Work Light Housing
How a CNC order runs
One project manager handles your order from drawing review to shipment.
DFM review & quote
Free DFM review of tolerances, features and material, with a quote within 24 hours on a complete package.
Programming & first article
CAM programming and fixturing, then a first article check against the drawing.
Machining & finishing
Milling, turning and finishing with in-process checks on critical features.
Inspection & shipment
Final inspection with a 3D measurement report, then export packing and shipment.
CNC machining cost
Price is driven by machine time, which depends on geometry, material, tolerance and the number of set-ups, plus material, finishing, inspection and the set-up cost spread over the quantity. Larger lots lower the price per part. When volumes grow, we can compare CNC against molding or die casting in the same quote.
Industries we machine parts for
Electronics enclosures and heat sinks, medical device and instrument parts, automotive components, aerospace parts, robotics, industrial equipment and consumer products, for brand owners and OEM procurement teams.
CNC machining FAQ
What tolerances can you hold?
Critical features can be held to 0.005 mm, depending on the feature, material and part size. Other dimensions follow a general tolerance such as ISO 2768 medium unless the drawing specifies otherwise.
Is there a minimum order quantity for CNC machining?
No. One piece is welcome for prototypes, and the same programs and fixtures are used for repeat production lots.
How long does CNC machining take?
CNC prototypes take 3–5 days and production orders typically 5–10 days, depending on quantity, complexity and finishing. Rush service is available.
Which materials can you machine?
More than 50, including aluminum, stainless steel, steel, brass, copper, titanium and engineering plastics such as POM, nylon, ABS, PC and PEEK.
Do you offer 5-axis machining and CNC turning?
Yes. We run 3-, 4- and 5-axis milling, CNC turning and Swiss-type turning, and choose the set-up in the DFM review.
What finishes are available?
Bead blasting, anodizing including hard anodizing, plating, powder coating, passivation, polishing and laser marking, quoted together with the machining.
What inspection documents do I get?
Every order ships with a 3D dimensional measurement report. First article reports and material certificates are available on request.
Will you sign an NDA before I send drawings?
Yes. A confidentiality agreement is signed before any file review. See IP protection and NDA.
Get a CNC machining quote
From 1 piece · free DFM · NDA before file review · reply ≤12h · quote ≤24h on complete RFQ · ISO 9001:2015