Precision CNC Turning Services
If you have extremely high precision requirements and want high-performance parts, then you’ve come to the right place. We can provide high-performance CNC turning services solutions for more than 50 different metals and plastics, from rapid prototyping to mass production, and you can get high-quality custom-made turning parts within a few days.
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Certifications: ISO 9001:2015 | ISO 13485:2016 | IATF16949
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Lingjun CNC Turning Services Capabilities
Our advanced CNC turning capabilities include:
Standard CNC Turning
- Taper turning → Shaping parts into conical profiles with varying diameters
- Facing → Machining flat ends that are perpendicular to the axis of rotation
- Threading → Cutting internal or external threads with accurate pitch and depth
- Straight turning → Turning to decrease the diameter of cylindrical parts
Specialized CNC Turning
Swiss-type CNC machining for small precision components → A precision turning technique using a sliding headstock, ideal for producing small, intricate parts with exceptional accuracy, especially where tight tolerances are required.
Multi-axis turning → Turning on multiple axes allows the creation of complex geometries and detailed features that standard turning methods cannot achieve.
Hard turning → Machining of hardened materials (over 45 HRC) to achieve high wear resistance and durability.
Lingjun CNC Turning Services Tolerances & Design Guidelines
CNC Turning Design Guidelines
| Recommended Size | |
|---|---|
| Radii | Minimum internal radius of 0.5 mm recommended. Larger radii (up to 3 mm or more) can improve tool access and reduce stress concentrations in the part. |
| Threads and Tapped Holes | External and internal threads can be precisely cut. Standard thread sizes from M1.6 and larger are feasible. Ensure a minimum thread length of 1.5 times the diameter for stability. |
| Minumum Wall Thickness | Maintain a minimum wall thickness of 0.8 mm for metals and 1.5 mm for plastics to ensure structural integrity without compromising the machining process. |
| Text | Engraving should have a minimum character height of 2 mm and a depth of at least 0.5 mm to ensure legibility after machining. |
| Holes | Minimum hole diameter of 0.5 mm. For deep holes, maintain a diameter to depth ratio of 1:10 to avoid tool deflection and ensure hole quality. |
CNC Turning Tolerances
| Limits for nominal size | Plastics (ISO 2768- m) | Metals (ISO 2768- f) |
|---|---|---|
| 0.5mm* to 3mm | ±0.1mm | ±0.05mm |
| Over 3mm to 6mm | ±0.1mm | ±0.05mm |
| Over 6mm to 30mm | ±0.2mm | ±0.1mm |
| Over 30mm to 120mm | ±0.3mm | ±0.15mm |
| Over 120mm to 400mm | ±0.5mm | ±0.2mm |
| Over 400mm to 1000mm | ±0.8mm | ±0.3mm |
| Over 1000mm to 2000mm | ±1.2mm | ±0.5mm |
| Over 2000mm to 4000mm | ±2mm | |
| *Please clearly indicate tolerances for nominal sizes below 0.5mm on your technical drawing. |
CNC Turning Materials
If you cannot find the materials you need, please contact info@lingjunth.com. We can procure them according to your project specifications.
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Available Varieties
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Aluminium
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Aluminum 6061, 6061-T6 Aluminum 2024 Aluminum 5052 Aluminum 5083
Aluminum 6063 Aluminum 6082 Aluminum 7075, 7075-T6 Aluminum ADC12 (A380)
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Brass
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Brass C27400 Brass C28000 Brass C36000
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Copper
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Copper C101(T2) Copper C103(T1) Copper C103(TU2) Copper C110(TU0)
Beryllium Copper
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Stainless steel
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Stainless Steel SUS201 Stainless Steel SUS303 Stainless Steel SUS 304 Stainless Steel SUS316 Stainless Steel SUS316L Stainless Steel SUS420 Stainless Steel SUS430 Stainless Steel SUS431 Stainless Steel SUS440C Stainless Steel SUS630/17-4PH Stainless Steel AISI 304 |
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Alloy Steel
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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 |
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Titanium
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Titanium Grade 2,Titanium 6Al-4V
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| Magnesium | Magnesium Alloy AZ31B Magnesium Alloy AZ91D |
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Plastics
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ABS, Acrylic, Nylon, PEEK,Polycarbonate, Polypropylene, Polyethylene
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Get a Tailored Material Assessment！
Surface Finishes Options of CNC Turning Parts
Achieve the perfect finish for your CNC-turned parts with our range of surface treatment options.
Anodized
This highly durable finish offers a broad spectrum of color dyes and adjustable luster, ranging from uniform matte to brilliant gloss. The achieved oxide film thickness is tightly controlled, typically ranging from 2 µm to 40 µm.
Polishing
Our Polished Finish achieves an exceptionally smooth, high-gloss surface. Engineered for optical reflectivity, it meets a strict surface roughness standard of Ra 0.8μm (Ra 32 micro-inches).
Bead Blasting
Applicable across diverse metallic and plastic substrates, this process yields a uniform satin finish and subdued luster. Crucially, it is non-destructive, guaranteeing dimensional integrity with negligible material removal.
Black Oxide
Black oxide is a chemical conversion coating applied to ferrous metals. It delivers a uniform, non-reflective matte black aesthetic while providing mild corrosion resistance and enhanced lubricity (often requiring a supplementary oil).
Powder Coating
Suitable for metal parts, this finish provides matte, glossy, or textured surface options in fully customizable colors. Typical material removal ranges from 0.05 mm to 0.15 mm, delivering a clean and uniform appearance.
As Machined
As Machined means maintaining the original surface condition after machining, without any additional treatment. At Lingjun, this is an optional surface treatment option for parts, to avoid any misunderstandings regarding surface treatment.
Brushing
Brushing is a fantastic and widely used surface treatment process. Precision brushing imparts a refined satin finish to components, producing a smooth, uniform surface while subtly masking minor surface imperfections.
Electroless Nickel Plating
The electroless nickel plating process deposits a consistent, dense coating on metal surfaces, delivering superior corrosion protection while enhancing hardness and wear resistance for extended service life.
Chromate Conversion Coating
The resulting surface exhibits either a smooth or matte appearance, sometimes displaying a subtle clear or pale yellow hue. During the process, an extremely fine layer—ranging from 0.25 to 1 micrometer—is precisely removed, ensuring a uniform and controlled finish across the part.
E-Coating
Designed specifically for metal components, this surface treatment is available in both matte and glossy options, with black being the predominant choice due to its versatility and aesthetic appeal.
Painting
This surface treatment is suitable for both metal and plastic components, offering a range of finishes including matte, gloss, or textured. Precise color matching can also be achieved to meet specific design requirements or brand standards.
Heat Treatment
Through precisely controlled cycles of heating and cooling, heat treatment significantly improves the mechanical properties of metal components, enhancing hardness, tensile strength, toughness, and wear resistance, while also optimizing microstructural characteristics for superior performance in demanding applications.
If you have more complex surface finishing requirements
Please contact the info@lingjunth.com
High Quality
When every detail of your CNC-turning parts turns out exactly as you envisioned, it’s because we’ve carefully checked your drawings and upheld demanding quality standards at every step.
Wide Range of Materials
Whatever properties your milled parts require, Lingjun supports you with a diverse portfolio of certified metals and plastics—more than 30+ types to choose from.
Custom Finishes
If you require this value-added service, we can offer you a wide range of reliable custom finish options, along with 24/7 support throughout the year.
Quick Delivery
Keep your operations moving forward—Lingjun’s local workshops and cutting-edge machines deliver rapid turnaround so you never miss an important deadline.
No MOQ
Minimum order quantities may be a problem for some CNC machining service providers, but it's not an issue at Lingjun. We have no minimum order quantity. Whether it's a single prototype, small batch production, or large-scale production,
Engineering Support
No matter the time or place, you can move forward with your CNC milling projects confidently. Our skilled team delivers clear, practical advice throughout the process to enhance both design efficiency and final quality.
Advantages and Applications of CNC Turning
CNC turning provides a wide range of advantages that make it an ideal choice for producing accurate cylindrical components. Below are the main strengths of this process:
- Precision and Accuracy These machines deliver exceptionally tight tolerances, ensuring every part fits perfectly within intricate mechanical systems.
- Efficiency After initial setup and programming, CNC lathes can manufacture parts rapidly and consistently, often running with little oversight—significantly speeding up production timelines.
- Flexibility Quick reprogramming allows the equipment to switch between different part designs with ease, enabling manufacturers to respond swiftly to changing project requirements.
- Repeatability Automated operation guarantees uniformity, producing identical parts even at high volumes—an essential factor for reliable mass production.
- Lower Labor Costs Because the process requires minimal manual handling, companies can reduce labor expenses while also lowering the chance of human error, resulting in better efficiency and cost savings.
- Material Versatility CNC turning supports a broad spectrum of materials—including metals, plastics, and composite options—making it suitable for varied applications and industries.
- Enhanced Safety With most operations enclosed and automated, worker exposure is minimized, reducing accident risks and promoting a safer production environment.
Shafts & Rotational Components
Ideal for producing perfectly round parts such as shafts, pins, bushings, spacers, and rollers—anything that relies on stable rotational symmetry.Threaded Parts
Widely used for manufacturing precision screws, bolts, threaded inserts, and custom thread forms required in mechanical assemblies.Housings & Connector Bodies
Suitable for cylindrical enclosures, sensor bodies, connector shells, and valve components that demand smooth surfaces and exact dimensions.Automotive & Aerospace Parts
Frequently applied to engine components, hydraulic fittings, landing-gear pins, and other critical parts where strength and consistency are essential.Medical & Instrumentation Devices
Perfect for producing miniature, high-accuracy items like implant screws, surgical tool tips, and diagnostic instrument components.Custom Fasteners & Fittings
Used to create unique fasteners, couplings, adapters, and fluid-control components customized for different industries.
Why Choose Us CNC Turning Services
After reading all this, I’m sure you’re all wondering why you should choose our CNC turning services. Here are the reasons.
1.We have our own factory and integrate industry and trade.
Having a factory probably brings many advantages to mind, such as:
- Factory prices are lower.
- Most factories have ample order volume, so their processing experience is naturally very strong.
- Faster speed, without subcontracting or transshipment, the production process is more direct and efficient.
- Better Direct Communication aims to enable direct dialogue with frontline personnel in design, production, and quality control, reducing information distortion.
2.Greater Customizatio
- Full Customization, From Concept to Component. We don't just execute your file—we partner with you, offering Design for Manufacturing (DFM) consultation to optimize performance and cost before production even begins.
- We also thrive on complexity. Our engineering depth allows us to navigate the tightest tolerances and most challenging geometries that off-the-shelf solutions cannot meet.
3.Superior Quality Control / QC
- End-to-End Quality Accountability. Every component we produce is governed by a rigorous, transparent ISO-certified quality management system, providing full material and process traceability from raw stock to final inspection
- Verification Beyond Visual Inspection. We utilize advanced metrology equipment, including CMM (Coordinate Measuring Machines) and optical comparators, to verify that every critical dimension meets our tightest tolerance standards.
- Driven by Dedicated QC Engineers. Our quality assurance is managed by a dedicated team of engineers who meticulously audit every batch, ensuring every component leaving Lingjun meets the exact specifications of your design.
4.Powerful Machining Capability
- Complex Geometry, Confidently Achieved. Our multi-axis CNC platforms are dedicated to tackling the industry's most challenging features—from deep-hole, high-aspect-ratio bores to free-form, tight-tolerance contours—regardless of material hardness or abrasiveness.
- Material Sourcing Mastery. With a supply chain tailored to handle the unordinary, Lingjun eliminates material bottlenecks. We routinely machine high-performance polymers, exotic superalloys (Inconel, Titanium, Hastelloy), and specialized composites that other vendors struggle to even procure.
5.Cost Optimization
- Optimizing Cycle Time, Lowering Your Overhead. Through expert toolpath programming and machine sequence refinement, we significantly reduce the machine 'cycle time' for complex parts. This efficiency translates directly into a lower machine-hour rate passed on to your project.
- Cost Reduction Begins at Design. Our DFM specialists proactively collaborate during your design phase to eliminate overly complex features or unnecessary tight tolerances. By simplifying the part for manufacture, we prevent high-cost machining operations before they are budgeted.
6.Stable Capacity and Delivery Guarantee
- Predictable Performance, Guaranteed Delivery. As the direct manufacturer, we command full control over our production schedule and integrated supply chain. This stability translates into firm, reliable lead times and the confidence that your volume orders will be fulfilled on time, every time, even during peak demand.
FAQs About CNC Turning Services
What Is CNC Turning & How Does It Work?
What Is CNC Turning?
CNC (Computer Numerical Control) turning is a highly precise subtractive manufacturing process that uses computer-controlled lathes to remove material from a rotating workpiece, creating parts with rotational symmetry.
It is ideal for producing cylindrical, conical, or disc-shaped components (known as turned parts or lathe parts) with exceptional tight tolerances and repeatable surface finishes.
How Does It Work?
The process involves three core actions:
Rotation: The workpiece (usually raw material stock) is firmly clamped in a chuck and rotated at high speed.
Tool Movement: A cutting tool, fixed in a turret, is controlled by the CNC program to move linearly along the X (radial) and Z (axial) axes.
Material Removal: The tool contacts the rotating material, shaving off chips (swarf) until the desired shape and dimensions are achieved.
Advanced CNC turning centers (like turning-milling or live-tooling lathes) can also perform secondary operations, such as drilling, tapping, and milling, without removing the part from the machine, increasing efficiency and geometric complexity.
Do your CNC turning services extend to plastic materials?
As a highly versatile process, CNC turning is perfectly suited for working with nearly all plastic materials.
The versatility of our turning centers allows us to routinely process a broad range of plastics, including:
Nylon: Favored for its superior strength and exceptional wear resistance.
POM (Acetal): Valued for its excellent dimensional stability and ease of machinability.
PTFE (Teflon): Chosen for its low friction and chemical resistance.
ABS & Polycarbonate: Utilized when impact resistance and clarity are required.
Achieving success with plastic turned parts depends entirely on technical finesse. Unlike metals, plastics require specialized tooling and meticulous management of spindle speed and feed rates to prevent thermal deformation or melting. Our expertise ensures these critical variables are strictly controlled, guaranteeing the highest quality, high-precision components for even the most demanding applications.
What is the production cycle for CNC-machined parts at your company?
Lingjun utilizes state-of-the-art CNC machinery, allowing for exceptional responsiveness. For urgent prototyping or small-batch production, we can often achieve a turnaround in as little as one day. However, for mid-to-high volume orders, lead times are determined by the complexity and scale of the project, requiring us to provide an estimated schedule based on actual production capacity.
What is your maximum achievable tolerance for a turned part?
Our advanced, high-precision CNC Turning Centers, operated by expert technicians and engineers, routinely achieve tolerances as tight as $\pm0.01$ millimeters on turned parts.
What’s the difference between CNC milling and CNC turning?
CNC milling and CNC turning are both subtractive manufacturing processes, but they differ in how the material is removed.
In CNC milling, the workpiece is stationary, and the cutting tool moves across multiple axes to remove material and create the desired shape. This process is ideal for complex parts with various features such as slots, holes, and contours.
On the other hand, CNC turning involves rotating the workpiece while a stationary cutting tool removes material. This method is best suited for producing cylindrical parts, such as shafts, rings, and bolts. While milling can handle more complex geometries, turning is typically faster and more efficient for producing round parts.
Is there a difference between a CNC lathe and a turning center?
In manufacturing, the terms CNC lathe and turning center are often used interchangeably, but they do have important differences in terms of technology and function.
Simply put, a turning center is a more powerful and complex upgrade of a CNC lathe. The table below provides a comparison between them.
| Feature | CNC Lathe | Turning Center |
| Primary Function | Pure Turning (Cylindrical Features only) | Turning + Milling/Drilling (Multi-function Compound Machining) |
| Tool Type | Fixed Tooling Only | Features Live Tooling (Rotary Tools) |
| Typical Axes | 2 Axes (X, Z) | 3 Axes and Up (X, Z, C, Y Axes, etc.) |
| Complex Parts | Requires second setup or transfer to a milling machine | Can be completed in a single setup (One-and-Done) |
| Target Application | Simple, High-Volume, Purely Cylindrical Parts | Complex, High-Precision, Multi-featured Components |
Who are the top ten CNC turning parts manufacturers in China?
China’s CNC manufacturing industry is globally recognized as a leader in precision, scale, and technological depth, setting benchmarks for exquisite craftsmanship and superior quality across various industrial sectors.
Among these elite companies, Lingjun CNC stands out. Our relentless pursuit of engineering perfection and unwavering commitment to customer satisfaction make us the preferred choice for our clients.
For a complete list of industry giants and our ability to define world-class companies, please refer to our detailed guide: “Top Ten CNC Turning Parts Manufacturers in China”.
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