China CNC Machining Service
When your project demands tight tolerances and a fast turnaround, every day without parts is a day lost. Getting your design into production depends on choosing a China CNC machining service that can hold the spec, hit the schedule, and back it up with documented quality.
At XTJ CNC, we’ve spent 20+ years manufacturing precision metal and plastic components from our 12,000 m² Dongguan facility, serving OEM engineers, R&D teams, and procurement managers who need parts that work the first time.
Whether you need a single prototype or a high-volume production run, our on-demand custom manufacturing service covers CNC milling, CNC turning, sheet metal fabrication, 3D printing, injection molding, and more, all under one roof, with no minimum order quantity (MOQ).
Precision CNC Parts, Delivered to Your Specs
We manufacture custom CNC-machined parts that match your drawings exactly. We don’t do approximations or off-the-shelf substitutions. With ISO 9001 certification, CMM inspection on every order, and a direct engineering team reviewing your files before production starts, you’re not taking a risk on an unknown supplier.
- Tolerances down to ±0.003 mm, so you don’t have to rely on “close enough.”
- Prototypes ready in as little as 5 days, not weeks.
- No minimum order quantity.
- End-to-end DFM review, machining, finishing, CMM inspection, and global shipping.
- ISO 9001 and IATF 16949 certified, with full material traceability on every order.
Why Source CNC Machining Services from China?
China accounts for roughly 31% of global machine tool consumption, according to the Gardner Intelligence 2023 World Machine Tool Survey. That scale drives investment in advanced equipment and keeps unit costs competitive. For engineering teams sourcing precision parts, three factors make China’s CNC machining services worth considering:
- Lower overhead costs: Labor, facility, and energy costs in southern China’s manufacturing belt are substantially lower than in the US, EU, or Japan. Those savings go directly to your part price, especially on larger batches.
- Advanced equipment density: Top-tier Chinese CNC shops run 3- to 5-axis machining centers from DMG MORI, FANUC, and MAZAK. Tooling breadth and machine capacity often exceed those of smaller Western job shops.
- Established supply chains: Proximity to aluminum, stainless steel, titanium, and engineering plastic suppliers keeps material lead times short and raw-material costs predictable.
We can verify quality, which is the common concern. XTJ CNC holds ISO 9001 and IATF 16949 certifications and has supplied OEMs such as Magna, Shimadzu Medical, BEKO, and Electrolux. Those are supply chains with documented incoming quality requirements, and we meet them on every order.
Our China CNC Machining Services
XTJ CNC operates 120+ advanced CNC machines across multiple process families. Here’s what’s available and when each process fits your project:
CNC Milling (3-axis, 4-axis, and 5-axis): Rotating cutting tools remove material from a stationary workpiece. 3-axis handles flat and prismatic parts, such as brackets, housings, and plates. 5-axis accesses complex contours and undercuts in a single setup, holding positional tolerances of ±0.003 mm on critical features and surface finishes down to Ra 0.8 μm.
CNC Turning and Turn-Milling: Rotating stock against a fixed cutting tool produces cylindrical and conical features such as shafts, bushings, fittings, and threaded components. Turn-milling combines both operations in one setup, eliminating secondary fixturing and the positional error it introduces.
Sheet Metal Fabrication: Laser cutting, CNC bending, welding, and forming for aluminum, mild steel, and stainless steel. Laser cutting holds profile dimensions to ±0.1 mm; bend angles are held to ±0.5°. Typical applications include enclosures, brackets, chassis, and structural frames.
Rapid Prototyping (CNC, SLA, SLS, Vacuum Casting): CNC-machined prototypes ship in 5 to 7 days. Stereolithography (SLA) and Selective Laser Sintering (SLS) 3D printing serve concept models and functional test specimens. Vacuum casting produces 10 to 50 parts in polyurethane materials for validation before injection-mold tooling is cut.
Injection Molding and Die Casting: When volumes justify tooling, we produce injection molds for plastic parts and die-cast tooling for aluminum and zinc components. Our DFM team reviews wall thickness, draft angles, gate placement, and parting lines before any tooling steel is cut.
Surface Finishing: Anodizing (Type II and Type III hard anodize), electroplating (nickel, chrome, zinc), powder coating, painting, polishing, and deburring. Type III hard anodize adds a 25 μm oxide layer, bringing aluminum surface hardness to 60–70 HRC.
Which Materials Do We Machine?
Material selection affects your part’s cost, lead time, and performance. Here are the most common options and what to consider when choosing:
Aluminum 6061 and 7075: The most common CNC materials. 6061 machines quickly and resists corrosion well; 7075 offers higher tensile strength (503 MPa vs. 310 MPa) for structural aerospace and sports. Both anodize well.
Stainless Steel 303 and 316: 303 is the free-machining grade for standard corrosion-resistant applications; 316 adds molybdenum for marine and medical environments where chloride exposure is a concern.
Titanium Grade 2 and Grade 5 (Ti-6Al-4V): High strength-to-weight ratio and excellent biocompatibility make Grade 5 the standard for aerospace brackets and medical implants. Machining costs run 3 to 5× aluminum due to tool wear and slower feed rates.
Brass and Copper: Excellent machinability with high thermal and electrical conductivity. Common for fittings, connectors, and heat-sink components.
Engineering Plastics (POM, PTFE, PEEK, ABS, Nylon): We machine tight-tolerance plastic parts for medical, electronics, and food-processing applications. PEEK withstands continuous use at temperatures up to 480°F and resists most chemicals, making it a direct metal replacement in weight-sensitive assemblies.
For material property references, the ASM MatWeb database covers alloy specifications and mechanical data. Tolerance fits are governed by ISO 286-1, which is a useful reference when specifying hole and shaft fits on your drawings.
Quality Assurance in Our CNC Machining Process
Quality is a documented process for us. Our ISO 9001-certified quality management system covers every stage from raw material receipt through final shipment.
Incoming material verification: Every material lot is verified against its mill certificate before stock is loaded onto a machine. Alloy composition, hardness, and heat treatment are confirmed before cutting begins.
In-process checks: Our machinists perform first-article inspections on every new setup. Critical dimensions are re-checked at intervals specified in the process control plan. If a dimension drifts outside the control limit, production stops for correction before bad parts accumulate.
CMM final inspection: Finished parts are inspected with a coordinate measuring machine (CMM) to verify dimensions against your drawing. CMM reports ship with the parts, so your incoming quality team has objective evidence.
PPAP documentation: For automotive programs that require IATF 16949 compliance, we provide full Production Part Approval Process (PPAP) documentation upon request.
China CNC Machining Services Across Multiple Industries
XTJ CNC supplies precision-machined parts for engineering teams across demanding sectors:
Automotive
Prototype and low-volume production parts for powertrain, chassis, and interior assemblies. IATF 16949 compliance and PPAP documentation are available for programs that require them. We’ve worked with Tier 1 suppliers, including Magna, on components with sub-0.01 mm tolerances and full traceability requirements.
Aerospace
Structural brackets, housings, and fluid-system components in aluminum, titanium, and stainless steel. We work from model-based definition (MBD) packages and maintain ISO 9001 documentation practices for aerospace customers with strict drawing revision controls.
Medical and Healthcare
Surgical instruments, implant components, and diagnostic device housings in 316L stainless steel and titanium. Biocompatibility requirements and ISO 13485 documentation are available on request. We manufacture for Shimadzu Medical, which gives you a direct reference point for the quality level we deliver.
Electronics and Consumer Electronics
Precision enclosures, heat sinks, connectors, and RF shielding components. We machine to tight positional tolerances for PCB interfaces and connector-mating surfaces, including tight-tolerance blind bores and thread inserts for miniaturized housings.
Industrial and General Manufacturing
Custom fixtures, tooling inserts, replacement machine components, and prototype production tooling. No order is too small, and our no-MOQ policy means R&D teams can validate designs without ordering excess inventory or committing to a production run before the design is proven.
Why Choose XTJ CNC for CNC Machining in China?
XTJ CNC is a precision manufacturing partner with 20+ years of experience in CNC machining and rapid prototyping. Here’s what that means for your project:
20+ years in precision manufacturing since 2005, with a track record across aerospace, automotive, medical, and electronics OEMs.
120+ advanced CNC machines, from 3 to 5-axis milling centers, CNC lathes, turn-milling centers, and sheet metal equipment. These are all in a single 12,000 m² facility.
Tolerances to ±0.003 mm, verified by CMM inspection on every order, with measurement reports provided as standard.
Prototypes in as little as 5 days with no MOQ, so you can validate a design without committing to unnecessary inventory.
End-to-end service: DFM review, machining, finishing, CMM inspection, and global shipping without coordinating multiple suppliers.
ISO 9001 and IATF 16949 certified, with PPAP documentation available for automotive programs.
OEM clients include Magna, Shimadzu Medical, BEKO, and Electrolux. These are brands whose supply-chain audits verify our quality credentials.
We help engineers and product teams move from concept to production-ready parts without minimum order constraints. Get a free DFM review and instant quote.
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