Large Structural Components
Machined with close control of flatness, parallelism, feature position and interface alignment across extended dimensions.
Large CNC Machining Services
Backed by 30 years of experience, our one-stop large part CNC machining service delivers high-quality oversized components from material sourcing to final inspection—saving you time and the hassle of managing multiple suppliers.
Large CNC Machining services for Custom Parts
Our one-stop large machining capabilities cover every stage from rough machining to final finishing. We select and combine the right processes to reduce supplier handoffs, control critical dimensions and deliver parts ready for inspection and assembly.
Large CNC Milling
Handles complex geometries and multiple features across a large working envelope. Optimized setups reduce repositioning and maintain dimensional relationships across the full component.
Large CNC Turning
Provides consistent dimensional control across large diameters and extended lengths. Suitable for critical requirements involving roundness, concentricity, runout and internal-to-external feature alignment.
Horizontal Boring
Supports accurately aligned bores and multi-side machining from a stable setup. Fewer positioning changes help preserve feature relationships and improve repeatability.
Deep Hole Drilling
Produces deep holes with controlled straightness and consistent diameter. Careful process planning maintains accuracy and internal surface quality throughout the drilling depth.
Grinding
Refines critical dimensions and functional surfaces requiring tighter accuracy or a smoother finish. Provides greater control of size, flatness, parallelism and surface roughness.
Surface Finish
Brings critical features to their final dimensions, GD&T and surface requirements. Completed components are verified and prepared for assembly or subsequent processing.
A Trusted Large-Part Machining Partner in China
With 30 years of machining experience, we provide more than large part CNC machining. We manage the complete manufacturing process through one accountable team, giving you consistent quality, clearer communication and fewer suppliers to coordinate.
Every project is reviewed according to its size, weight, material, geometry and critical requirements. Our engineers coordinate the appropriate equipment, machining sequence, supporting processes and inspection plan to deliver a finished component that meets your drawing and arrives ready for its next stage.
50+
Machines Set
120+
Countries Shipped
20,000+
Customers Served
| Capability | Our Capacity |
|---|---|
| Maximum Milling Size | 6,000 × 3,000 × 2,000 mm |
| Maximum Turning Size | 2,500 × 6,000 mm |
| Horizontal Boring Travel | X: 4,000 / Y: 3,000 / Z: 2,000 / W: 700 mm |
| Deep Hole Drilling | Up to 3,000 mm deep, Ø20–250 mm |
| Maximum Grinding Size | 4,000 × 1,500 × 1,000 mm |
| Maximum Part Weight | Up to 20 tons |
| Dimensional Tolerance | Standard ±0.10 mm; up to ±0.02 mm on critical features |
| Geometric Accuracy | Flatness and parallelism up to 0.05 mm per 1,000 mm |
| Surface Finish | Standard Ra 3.2 μm; up to Ra 0.8 μm |
| Production Volume | One-off, prototype, low-volume and repeat production |
| Inspection | In-process inspection and final dimensional reports available |
Large CNC Machined Parts Materials
We machine a wide range of engineering materials and help you choose the most cost-effective option for your part—balancing performance, machinability, tolerance requirements and budget.
Large CNC Machined Parts We Produce
Here are some of the large parts we have produced. We continually refine our machining processes to deliver the accuracy, quality and reliability that earn customer trust and satisfaction.
Large-Part Machining for Demanding Industries
Large machined components often perform critical structural, positioning, sealing or load-bearing functions. We adapt our machining, inspection and documentation approach to the technical and quality requirements of each industry.
Quality Inspection Built for Large CNC Machined Parts
Our inspection planning begins before machining, ensuring that the component can be measured under controlled and repeatable conditions throughout production.
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Large-Range Dimensional Measurement
Large-format CMMs, measuring arms or laser trackers verify dimensions across the full component.
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Weight, Support & Temperature Control
Controlled support and measurement conditions reduce errors caused by component weight, positioning and temperature variation.
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Datum & Alignment Verification
A consistent datum system verifies critical feature relationships across long distances, multiple sides and machining setups.
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In-Process Dimensional Control
Checks at key machining stages identify deviations early, allowing correction before final inspection.
Packaging and Shipping for Large Machined Parts
Every component is protected, secured and prepared for its journey—so it arrives safely, on schedule and ready for use.
Custom Packaging
Packaging and internal supports are designed around the component’s dimensions, weight and center of gravity.
Surface Protection
Machined and critical surfaces are protected against moisture, corrosion, impact and contact damage during storage and transportation.
Secure Handling & Loading
Lifting points, supports and restraints are planned to keep heavy components stable throughout loading, transit and unloading.
Global Shipping Support
We coordinate suitable freight, export packaging and shipping documentation for reliable delivery to your destination.
yongshuo Platform
Not Sure If
Your Large CNC Part Is Machinable?
Upload your 3D model and 2D drawing. Our engineers will review the size, material, geometry, critical tolerances and inspection requirements, identify potential manufacturing risks, and recommend a practical machining approach.
Challenges in Large Part CNC Machining — And How We Solve Them
Our process engineers understand how size, weight, material stress and long machining cycles affect large components, helping reduce the common risks associated with precision large part CNC machining.
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Deformation & Material Stress
Residual stress, uneven material removal and the component’s own weight can cause dimensional movement during machining or after the workpiece is released from its fixture.
CNC Machining FAQs
What Counts as a Large Part?
There is no single industry-wide size that defines a large CNC machined part. A component is generally considered “large” when its dimensions, weight, geometry or inspection requirements exceed the practical limits of standard machining equipment and handling methods.
Oversized：The component exceeds a standard machine’s working envelope or requires an extended machining range.
Long or Large-Diameter：Extended lengths and large diameters require additional control of alignment, stability, concentricity and runout.
Heavy：The component requires high-capacity tables, lifting equipment and specially planned support during machining and inspection.
Complex to Handle or Measure：Even a moderately sized component may require large-part machining methods when its geometry, rigidity, setup or long-range tolerances demand specialized equipment and inspection.
What is large part CNC machining?
Large part CNC machining produces oversized, long, large-diameter or heavy components that require extended machine travel, higher load capacity and specialized handling. Size, weight, geometry and tolerance requirements collectively determine whether a project needs large-part machining.
What size and weight can your equipment handle?
Our milling capacity reaches 6,000 × 3,000 × 2,000 mm, with turning capacity up to Ø2,500 × 6,000 mm and component weight up to 20 tons. Effective capacity depends on workholding, tool access, geometry and tolerance requirements.
What metals are available for large CNC machined parts?
Common metals for large CNC machined parts include aluminum, carbon steel, alloy steel, stainless steel, cast iron, tool steel, titanium and nickel alloys. Our engineers can recommend a suitable and cost-effective material based on performance, machinability and budget.
What is the advantage of large part horizontal CNC machining?
Large part horizontal CNC machining provides stable access to deep bores, aligned features and multiple sides of a component. It can reduce repositioning and help maintain dimensional relationships across different machining areas.