Large CNC Machining Services for Large-sized High Precision Metal Components

We provide custom large CNC machining and 5-axis milling one-stop manufacturing solutions for oversized, high-tolerance metal structural components.

For industries including aerospace, new energy vehicles, energy equipment and medical devices, large structural parts require strict precision and complex geometry. Our large CNC machining service solves these challenges, delivering stable, high-quality large machined parts for global industrial customers.

From raw material sourcing, rough machining, precision milling, 5-axis multi-face machining, surface treatment to final inspection and packaging, we handle the full production workflow in-house. Equipped with large-scale CNC equipment and 5-axis linkage machining centers, we manufacture large metal components while meeting tight tolerance requirements.

Our Processing Capability

Core Machining Technology

Large CNC Milling

Our large CNC milling handles complex geometric profiles over large working envelopes. Optimized fixturing reduces repeated re-clamping and eliminates cumulative dimensional errors. It maintains consistent precision across the entire workpiece.

Typical applications: aircraft structural components, large molds, new energy vehicle battery trays and large equipment frames.

5-Axis Linkage Machining

Our 5-axis linkage machining centers complete complex multi-sided features in a single setup. This technology is ideal for deep cavities, undercuts and curved surfaces that cannot be produced on standard 3-axis machines.

Key benefits of 5-axis CNC machining:

• Single clamping for multi-face machining, removing tolerance stack-up from multiple re-fixturing
• Shorter production cycle and reduced waiting time between processes
• Optimized tool path for smoother surface finish
• Capable of complex curved surfaces, deep cavities and undercut features
• High-torque spindle plus thermal management system keeps precision stable during long machining cycles

Surface Treatment

We offer full surface finishing services to bring parts to final dimensional and surface requirements. Finished components pass full validation and are ready for assembly or secondary operations.

Machinable Materials

We machine a wide range of engineering metals and help customers select the most cost-effective material solution balancing mechanical performance, machinability, tolerance and budget.

• Aluminum AlloyLightweight, high strength and easy to machine. Common grades: 6061-T6 (general purpose),7075-T6 (high strength), 2024, 5052, 5083, 6063, 6082.
• Stainless steel, carbon steel and other custom metal materials available.

Quality Control & Inspection

We implement strict full-process quality control for large machined parts.

1. Inspection Equipment: Coordinate Measuring Machine (CMM) for full dimensional measurement of large workpieces.
2. In-process inspection: Real-time dimension monitoring during CNC machining.
3. First Article Inspection Report (FAIR): Full dimensional data and GD&T geometric tolerance analysis.
4. Surface finish verification to meet design requirements.
5. Complete material traceability documentation.
6. Final inspection report delivered with every shipment.

Our machining centers are equipped with thermal compensation systems to maintain repeatable accuracy even when ambient temperature changes.

Industry Applications

• Aerospace: Wing ribs, fuselage frames, floor beams, engine bay housings, titanium alloy structural parts, drone fuselages and fairings
• New Energy Vehicles: Battery tray panels, motor housings, structural subframes, post-processing for large integrated die-cast parts
• Energy Equipment: Large structural components for wind power, power generation, petrochemical and renewable energy systems
• Medical Equipment: Large medical imaging equipment frames, surgical robot structural components
• Semiconductor & Precision Equipment: Vacuum chamber parts, lithography machine frames, wafer processing system structural components
• Mold Manufacturing: Large injection molds, die-casting molds and complex curved-surface molds

Certifications

ISO 9001:2015 Quality Management System Certification

Why Choose Our Large CNC Machining Service

One-stop manufacturing service Full process managed by one team: material procurement, rough machining, precision CNC milling, 5-axis machining, surface treatment, assembly and packaging. No need to coordinate multiple vendors, saving your project management cost and lead time.

Decades of precision machining experience Our engineering team reviews every project based on part size, weight, material, geometry and critical tolerance requirements. We select suitable machines, machining sequences and inspection plans to produce parts matching your 2D/3D drawings.

 Global export experience We have supplied custom CNC machined parts to customers across more than 120 countries and regions, with rich export compliance and documentation experience.

 Competitive pricing Optimized process planning and production efficiency deliver competitive cost without sacrificing precision requirements.

Flexible production volume Support one-off custom prototype, small batch and mass production. We handle low-volume prototyping through large-volume repetitive orders.

How to Start Your Custom CNC Project

1. Send your 2D drawings or 3D CAD files (STEP, IGS, DWG formats accepted)
2. Free DFM (Design for Manufacturability) analysis: our engineers review design, material selection, fixturing and processing strategy
3. Quotation and lead time confirmation after DFM review
4. Production and in-process quality inspection
5. Shipment with complete inspection reports and quality documents

FAQ

Q: What is your maximum machining size for large CNC parts?A: Our maximum milling size reaches 4500 × 550 × 700 mm.

Q: What tight tolerances can you achieve for large components?A: Standard tolerance ±0.10 mm. Key features can reach ±0.05 mm. Selected features via 5-axis machining can achieve ±0.02 mm.

Q: What materials can you machine for large CNC parts?A: Aluminum alloys (6061,7075,2024,5083 etc.), stainless steel, carbon steel and other custom engineering metals.

Q: Do you have MOQ requirement for large CNC machining?A: No minimum order quantity. We accept one-piece custom prototype, small batch and mass production orders.

Q: Do you provide surface treatment services?A: Yes. We offer Type II / Type III anodizing, powder coating, electroplating, passivation, polishing, sandblasting and laser engraving.

Q: What quality certifications do you hold?A: ISO 9001:2015 quality management system certification.

Get your custom large CNC machining solution today. Contact our engineering team for free DFM analysis and quotation within 24 hours.