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
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
50+
Machines Set
120+
Countries Shipped
20,000+
Customers Served
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.
Large Part CNC Machining Capabilities
Our large-format CNC capacity covers oversized milling, turning, boring, deep-hole drilling, and grinding—built for heavy, high-precision parts from prototype to repeat production.
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.
Aluminium
Aluminum is lightweight, strong, and easy to machine, positioning it great for various applications like aerospace and automotive parts. Its corrosion resistance also adds to its appeal in outdoor projects and structural components.
Color:
Subtypes:
Aluminum 6061, 6061-T6, Aluminum 2024, Aluminum 5052, Aluminum 5083, Aluminum 6063, Aluminum 6082, Aluminum 7075, 7075-T6, Aluminum ADC12 (A380)
Available Finish:
As machined, Anodizing, Powder coating, Electroplating, Painting, Sand blasting, Polishing
Price:
$$
Lead Time:
ABout 5 business days
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Copper
Copper is highly conductive and malleable, making it a top choice for electrical wiring and plumbing. Its natural antibacterial properties also make it ideal for medical applications, while its aesthetic appeal suits decorative items and artwork.
Color:
Red-orange
Subtypes:
Copper C101(T2), Copper C103(T1), Copper C103(TU2), Copper C110(TU0), Beryllium Copper
Available Finish:
As machined, Polishing, Sand blasting, Tumbling, Electropolish, Alodine, Heat treatment, Black oxidize, Electroless nickel, Chrome plating, Brushed finish
Price:
$$$
Lead Time:
ABout 5 business days
Bronze
Bronze, an alloy of copper and tin, is known for its durability and resistance to corrosion. It’s widely used in marine applications, sculptures, and bearings, thanks to its strength and ability to withstand harsh environments.
Color:
Metallic brown
Subtypes:
Tin Bronze
Available Finish:
As machined, Polishing, Sand blasting, Tumbling, Electropolish, Alodine, Heat treatment, Black oxidize, Electroless nickle, Chrome plating, Powder coating, Brushed finish
Price:
$$$
Lead Time:
ABout 5 business days
Steel
Steel is a strong and versatile material, widely used in construction and manufacturing. Its high tensile strength makes it suitable for structural components, while various Subtypes enhance its properties for specialized applications, like tools and machinery.
Color:
Silver Grey
Subtypes:
Steel 1018, 1020, 1025, 1045, 1215, 4130, 4140, 4340, 5140, A36, Die steel, Alloy steel, Chisel tool steel, Spring steel, High speed steel, Cold rolled steel, Bearing steel, SPCC
Available Finish:
As machined, Electroplating, Passivation, Powder coating
Price:
$$$
Lead Time: About 7 business days
Stainless Steel
Stainless steel is resistant to rust and staining, making it perfect for kitchen appliances and medical equipment. Its strength and aesthetic appeal also make it a popular choice for architectural designs and automotive parts.
Color:
Silver Grey
Subtypes:
Stainless Steel SUS201, SUS303, SUS 304, SUS316, SUS316L, SUS42, SUS430, SUS431, SUS440C, SUS630/17-4PH, AISI 304
Avaiblae Finish:
As machined, Electroplating, Passivation, Powder coating
Price:
$$$
Lead Time:
ABout 5 business days
Magnesium
Magnesium is lightweight yet strong, often used in aerospace and automotive applications where reducing weight is critical. Its machinability allows for complex shapes, and it's also utilized in various electronic devices for its excellent conductivity.
Color:
White-silver
Subtypes:
Magnesium Alloy AZ31B, AZ91D
Available Finish:
As machined, Polishing, Sand Blasting, Tumbling, Alodine, Heat treatment, Anodizing, Teflon coating, Electroless nickel, Painting, Powder coating, Electrophoresis
Price:
$$$$$
Lead Time:
About 8 business days
Titanium
Titanium is incredibly strong and lightweight, making it ideal for aerospace and medical implants. Its resistance to corrosion and biocompatibility enhance its use in demanding environments, while its high strength-to-weight ratio suits various industrial applications.
Color:
Silver
Subtypes:
Titanium Alloy TA1, Alloy TA2, Alloy TC4/Ti-6Al 4V
Available Finish:
As machined, Polishing, Sand Blasting, Tumbling, Electropolish, Alodine, Anodizing, Electroless nickel, Painting, Powder coating, Brushed finish
Price:
$$$$$
Lead Time:
ABout 5 business days
ABS
ABS is tough, heat-resistant, and impact-resistant. Lightweight and easy to work with, this material suits car parts and consumer goods where durability matters but cost is also important.
Color:
Lighe Beige Black
Subtypes:
ABS Beige(Natural), ABS Blac, ABS Black Antistati, ABS Milky Whit, ABS+PC Black, ABS+PC White
Available Finish:
As machined, Sand blasting, Tumbling, Teflon coating, Painting, Powder coating, Electrophoresis
Price:
$$
Lead Time:
About 6 business days
PC
Polycarbonate is super durable and clear, with amazing impact resistance. Commonly found in bulletproof glass and safety gear, it can take a hit without cracking.
Color:
Black White
Subtypes:
PC Black, PC Transparent, PC White, PC Yellowish White, PC+GF30 Black
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Brushed Finish
Price:
$$
Lead Time:
ABout 5 business days
PMMA (Acrylic)
PMMA (acrylic) is clear, weather-resistant, and won't fade. Ideal for outdoor displays, signage, and lighting, it holds up well in the elements.
Color:
Black White
Subtypes:
PMMA Black, PMMA Transparent, PMMA White
Available Finish:
As machined, Sand blasting, Tumbling, Painting
Price:
$
Lead Time:
ABout 5 business days
POM
POM is strong and has a low-friction surface, making it perfect for precision parts like gears and bearings where things need to fit just right and work smoothly.
Color:
Black White Blue
Subtypes:
Dark brown (coffee) POM 100AF, POM Black, POM Blue, POM White
Available Finish:
As machined, Sand blasting, Tumbling, Painting
Price:
$$
Lead Time:
ABout 5 business days
PA (Nylon)
Nylon is versatile, tough, and resists wear. Often chosen for gears, bearings, and other parts that handle constant friction and heat without breaking down.
Color:
Black Blue
Subtypes:
PA(Nylon) Blue, PA6 (Nylon)+GF15 Black, PA6 (Nylon)+GF30 Black, PA66 (Nylon) Beige(Natural), PA66 (Nylon) Black
Available Finish:
As machined, Sand blasting, Tumbling, Teflon coating, Painting, Powder coating
Price:
$$
Lead Time:
ABout 5 business days
PE
Polyethylene is lightweight and tough, with great impact resistance. It's a go-to material for packaging, containers, and anything that needs to resist cracking under pressure.
Color:
Black White
Subtypes:
HDPE, UHMW-PE, LDPE
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating
Price:
$$
Lead Time:
ABout 5 business days
PEEK
PEEK is strong and can handle high temperatures without losing its strength. Found in high-performance industries like aerospace and medical implants, it's built for extreme conditions.
Color:
Beige Black
Subtypes:
PEEK Beige(Natural), PEEK Black
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating
Price:
$$$$$
Lead Time:
ABout 5 business days
PP
Polypropylene is tough, chemical-resistant, and handles higher temps. It's commonly found in car parts, containers, and packaging, especially where exposure to heat or chemicals is common.
Color:
Black White
Subtypes:
PP Black, PP White, PP+GF30 Black
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating
Price:
$
Lead Time:
ABout 5 business days
HDPE
HDPE is super strong and impact-resistant, with a high strength-to-density ratio. Ideal for bottles, containers, and pipes that need to withstand outdoor wear and tear.
Color:
Black White
Subtypes:
HDPE Black, HDPE White
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating, Teflon coating
Price:
$$
Lead Time:
ABout 5 business days
HIPS
HIPS is easy to machine and holds up well to impact. This makes it an excellent choice for prototypes, models, and temporary displays where you need something light but sturdy.
Color:
White
Subtypes:
HIPS Board White
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating, Brushed finish
Price:
$$
Lead Time:
ABout 5 business days
LDPE
LDPE is soft, flexible, and resistant to cracking. Perfect for plastic bags, tubing, and shrink wrap where heat sealing is essential.
Color:
White
Subtypes:
LDPE White
Available Finish:
As machined, Painting, Powder coating, Teflon coating
Price:
$$
Lead Time:
ABout 5 business days
PBT
PBT is rigid, heat-resistant, and resists moisture. This material is often found in electrical parts, automotive components, and industrial connectors where high heat or wet conditions are a concern.
Color:
Black Milkey White
Subtypes:
PBT Black, PBT Milky White (Natural)
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Powder coating
Price:
$$
Lead Time:
ABout 5 business days
PPA
PPA offers heat resistance and stiffness. It's ideal for automotive and electrical applications where durability at high temperatures is essential.
Color:
Beige
Subtypes:
PPA Beige
Available Finish:
As machined, Sand blasting, Tumbling, Painting, Teflon coating, Brushed finish
Price:
$$
Lead Time:
ABout 5 business days
PAI
PAI is known for its amazing thermal and chemical stability. A top choice for aerospace and automotive sectors, it's used in high-performance parts that withstand extreme conditions.
Color:
Black Brown
Subtypes:
PAI 4203, 4503, 4301, 4501
Available Finish:
As machined, Sand blasting, Tumbling, Heat Treatment, Teflon Coating, Painting
Price:
$$
Lead Time:
ABout 5 business days
PET
PET is strong, moisture-resistant, and recyclable. Commonly found in food containers, bottles, and textiles, it resists wear and tear over time.
Color:
Black White
Subtypes:
PET Black, PET White, PET+GF30 Black, PET+GF30 White
Available Finish:
As machined, Sand blasting, Tumbling, Teflon Coating, Painting
Price:
$$
Lead Time:
ABout 5 business days
PPS
PPS is heat- and chemical-resistant, making it a great fit for automotive, aerospace, and industrial parts exposed to harsh environments that need to stay solid under stress.
Color:
Black White
Subtypes:
PPS Black, PPS White, PPS+GF30 Black
Available Finish:
As machined, Sand blasting, Tumbling, Teflon Coating, Painting
Price:
$$
Lead Time:
ABout 5 business days
PS
Polystyrene is lightweight and easy to shape, making it a popular option for models, prototypes, and disposable packaging where strength isn't the top concern but shaping is.
Color:
Transparent
Subtypes:
PS Transparent
Available Finish:
As machined, Sand blasting, Painting
Price:
$$
Lead Time:
ABout 5 business days
PVC
PVC is durable, affordable, and resistant to chemicals. Found in plumbing pipes, medical devices, and electrical cables, it resists corrosion and wear.
Color:
Grey
Subtypes:
PVC Grey
Available Finish:
As machined, Sand blasting, Painting, Teflon coating, Powder coating
Price:
$$
Lead Time:
ABout 5 business days
PTFE (Teflon)
PTFE is chemically resistant, low friction, and stable at high temperatures. Commonly used in non-stick coatings, gaskets, and seals where performance in tough conditions is a must.
Color:
Black White
Subtypes:
Teflon (PTFE) Black, Teflon (PTFE) White
Available Finish:
As machined, Sand blasting, Powder coating, Brushed finish
Price:
$$
Lead Time:
ABout 5 business days
UPE
UPE is tough with long polymer chains, making it ideal for abrasion-resistant applications like lining chutes and wear-resistant surfaces that see a lot of action.
Color:
Black White
Subtypes:
UPE Black, UPE White
Available Finish:
As machined, Sand blasting, Teflon coating, Painting
Price:
$$
Lead Time:
ABout 5 business days
Bakelite
Bakelite is heat-resistant, electrically non-conductive, and super durable. It’s found in electrical insulators and vintage electronics, where safety and long-lasting performance are critical.
Color:
Black Orange
Subtypes:
Bakelite Black, Bakelite Orange
Available Finish:
As machined, Painting, Powder coating, Brushed finish
Price:
$$
Lead Time:
ABout 5 business days
FR-4
FR-4 is flame-resistant, strong, and insulates electricity. Primarily used in electronics for circuit boards and parts that need to withstand heat and electrical stress.
Color:
Green Yellow
Subtypes:
FR-4 Aqua Green, FR-4 Yellow
Price:
$$
Lead Time:
ABout 5 business days
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 Structural Components
Machined with close control of flatness, parallelism, feature position and interface alignment across extended dimensions.
Large Rotational Components
Manufactured with consistent control of diameter, roundness, concentricity and runout across large diameters and extended lengths.
Housings & Multi-Sided Components
Coordinated datum and setup planning helps maintain the dimensional relationship between bores, surfaces and features located across multiple sides.
Precision Bases & Tooling Components
Produced around stable reference surfaces, accurate feature locations and controlled interfaces to support reliable positioning and assembly.
Cast, Forged & Fabricated Components
Machined from near-net material to final drawing requirements, with process planning that accounts for material variation, machining allowance and residual stress.
Custom Engineered Components
We support complex, non-standard and application-specific components for one-off projects, low-volume requirements and repeat production.
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.
Aerospace
Large-part machining with close attention to complex geometry, critical tolerances, material traceability and documented dimensional inspection.
Medical
Large-part machining for medical equipment frames, fixtures and housings with tight tolerances, controlled finishing and documented inspection support.
Automotive
Large-part manufacturing for tooling bases, fixtures and structural components where dimensional consistency, durability and repeatable production matter.
Electronics
Large housings, frames and interface plates machined with close control of flatness, mounting features and assembly-ready dimensional accuracy.
Energy
Controlled manufacturing for large components where dimensional stability, alignment, surface integrity and long-term operating reliability are essential.
Robotics
Precision machining of large bases, frames and motion-related structures to support accurate positioning, mounting and repeatable system performance.
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.
Large-Range Dimensional Measurement
Large-format CMMs, measuring arms or laser trackers verify dimensions across the full component.
Weight, Support & Temperature Control
Controlled support and measurement conditions reduce errors caused by component weight, positioning and temperature variation.
Datum & Alignment Verification
A consistent datum system verifies critical feature relationships across long distances, multiple sides and machining setups.
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.
YC PRECISION 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.
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.
Workholding & Setup Alignment
Large components require stable support without excessive clamping force. Improper workholding or repeated repositioning can introduce distortion, datum shifts and accumulated setup errors.
Thermal Growth & Machining Stability
Long machining cycles, cutting heat, vibration and extended tool reach can affect dimensional consistency and surface quality across a large working area.
Dimensional Accuracy & Inspection
Small deviations can become significant across long distances. Critical dimensions, geometric tolerances and feature relationships must be verified throughout production—not only after machining is complete.
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.