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CNC TURNING SERVICE
High-Precision CNC Turning from In-House Factory
CNC Turning Instant Quote
STEP | STP | IGS | DWG | DXF | PDF Files and More
MANUFACTURING SCALE
400+
FACTORY AREA
80,000 ㎡
SPEED & PRECISION
±0.0002"
CERTIFIED
ISO
Why Choose Unionfab for Your CNC Turning Projects?
400+ CNC Machines for Reliable Capacity
With 400+ advanced CNC machines across six facilities, Unionfab can support everything from rapid prototypes to volume production. A wide material selection helps match your exact project needs.
Built for Demanding Industries
Our CNC machining experience spans automotive, medical, consumer electronics, industrial equipment, and more, helping us meet strict requirements for precision, materials, and delivery.
Fast Quotes, Faster Project Starts
Get competitive pricing and lead times in minutes through our online quoting system. Our rapid prototyping support helps you validate designs, optimize parts, and reduce production costs earlier.
Lower Costs Without Compromising Quality
Unionfab helps customers save up to 50% compared with many European and American CNC machining providers, while maintaining reliable precision and part quality.
Certified Quality You Can Trust
With ISO 9001, 14001, 13485 & IATF 16949 certifications, Unionfab follows strict quality control processes to ensure your parts meet specifications from prototype to production.
400+
CNC Centers
4
In-House Facilities
300+
Vetted Suppliers
2M+
Parts Made
±0.0002"
Tight Tolerance
1 Day
Fastest Turnaround
Visit Unionfab CNC Machining Factories Online
3 Axis Machining Factory
4 Axis Machining Factory
5 Axis Machining Factory
CMM Inspection Room
CNC Turning Materials
We offer an extensive variety of high-quality CNC turning materials, carefully selected to ensure optimal performance across your diverse applications.
Steel
Durable carbon and tool steels offering high strength, wear resistance, and reliable machinability for demanding mechanical parts.
Ideal for: Shafts, gears, tooling components, fixtures, automotive parts, and heavy-duty industrial hardware
Stainless Steel
Corrosion-resistant stainless steels combining strength, durability, and clean surface performance for precision-machined parts.
Ideal for: Medical device parts, food-processing components, marine hardware, chemical equipment, and high-strength structural parts
Aluminum
Lightweight aluminum alloys with excellent strength-to-weight performance, corrosion resistance, and fast machinability.
Ideal for: Aerospace components, automotive parts, robotics frames, electronics housings, prototypes, and precision fixtures
Brass
Free-machining brass alloys offering outstanding machinability, good corrosion resistance, and reliable dimensional accuracy for high-volume precision parts.
Ideal for: sFittings, valves, fasteners, electrical terminals, fluid control components, and high-volume turned parts
Copper
Highly conductive copper alloys delivering excellent electrical performance, thermal transfer, and precision machining capability.
Ideal for: Electrical connectors, busbars, heat sinks, conductive components, terminals, and thermal management parts
Bronze
High-strength bronze alloys providing superior wear resistance, load-bearing capacity, and corrosion resistance for demanding mechanical applications.
Ideal for: Bearings, bushings, wear plates, springs, high-load mechanical components, connectors, and spring contacts
Titanium
High-performance titanium materials providing exceptional strength-to-weight ratio, corrosion resistance, and biocompatibility.
Ideal for: Aerospace parts, medical implants, marine components, high-performance fasteners, and lightweight structural applications
Engineering Plastics
Versatile engineering plastics offering lightweight performance, chemical resistance, insulation properties, and stable machinability.
Ideal for: Insulators, bushings, gears, wear pads, medical components, electronics parts, and low-friction mechanical components
Finishing Options for CNC Turning
We offer a wide range of finishing services to deliver the perfect balance of visual excellence and functional performance for your projects.
A mechanical surface treatment that bombards the part with fine glass beads at high pressure to remove tool marks and create a uniform, matte texture.
Best For: Enclosures, grip surfaces, and visible machined components requiring a consistent, non-reflective aesthetic finish with minor surface defects concealed
Polishing
A mechanical abrasion process that progressively smooths the part surface down to a glossy or mirror-like finish.
Best For: Decorative hardware, optical components, reflectors, and parts requiring improved cleanability or reduced surface friction
An electrochemical process that converts the metal surface into a durable, corrosion-resistant anodic oxide layer that can be dyed in custom colors. Type II minimally affects dimensions; Type III adds measurable layer thickness and should be accounted for in tight-tolerance designs.
Best For: Aluminum parts requiring wear resistance, environmental protection, or strict brand color matching
A dry finishing process where free-flowing polymer powder is applied electrostatically and cured under heat to form a tough, continuous protective skin.
Best For: Outdoor industrial equipment, metal frames, and structural components demanding impact resistance, UV protection, and long-lasting color coverage
An auto-catalytic chemical reaction that deposits a uniform nickel-phosphorus alloy coating across the entire part surface, regardless of geometric complexity.
Best For: Valves, bearing housings, internal cavities, blind holes, and tooling components requiring consistent coating thickness, corrosion resistance, and wear resistance
CNC Turning Technical Specifications
| Limits for nominal lengths | ISO 2768-m (Default) | 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 |
| Limits for nominal lengths | ISO 2768-m (Default) | ISO 2768-f |
|---|---|---|
| Up to 10mm | ±1° | ±1° |
| Over 10mm to 50mm | ±0°30′ | ±0°30′ |
| Over 50mm to 120mm | ±0°20′ | ±0°20′ |
| Over 120mm to 400mm | ±0°10′ | ±0°10′ |
| Over 400mm | ±0°05′ | ±0°05′ |
| Finish Tier | Metric (Ra μm) | Imperial (Ra μin) | ISO Grade |
|---|---|---|---|
| Default As-Machined | 3.2 μm | 125 μin | N8 |
| Fine Machined | 1.6 μm | 63 μin | N7 |
| Precision / Smooth | 0.8 μm | 32 μin | N6 |
| High-Precision Grinding* | 0.4 μm | 16 μin | N5 |
| Lapped / Polished* | 0.2 μm | 8 μin | N4 |
| Mirror / Superfinished* | 0.1 μm | 4 μin | N3 |
*Finishes of 0.4 μm (16 μin) and tighter exceed standard CNC capabilities, requiring secondary operations like precision cylindrical grinding, lapping, or mirror polishing.
| Metric | Imperial | |
|---|---|---|
| Max Size | Ø 200 × 500 mm Length | Ø 7.8″ × 19.6″ Length |
| Min Size | Ø 2 × 2 mm Length | Ø 0.08″ × 0.08″ Length |
| Material | Metric | Imperial |
|---|---|---|
| Metal Parts | 0.8 mm | 0.031″ |
| Plastic Parts | 1.5 mm | 0.059″ |
*Values above represent recommended minimums. Achievable wall thickness is heavily dependent on the part’s overall diameter, length, and material rigidity.
While our instant quoting platform uses your 3D CAD files for geometric pricing, any custom dimensions, threading specifications, GD&T callouts, or tight tolerances MUST be explicitly detailed in an accompanying 2D PDF drawing.
Applications of CNC Turning
Automotive
From engine components and gear blanks to shafts, bushings, pins, and threaded parts, CNC turning ensures smooth operation, longevity, and precise tolerances for reliable vehicle performance.
Medical and Dental
CNC turning produces high-precision components including surgical instruments, orthopedic screws, dental drill heads, prosthetics, and implant parts, all manufactured to strict biocompatibility standards vital for successful procedures and long-term patient well-being.
Industrial Production
CNC turning serves as a manufacturing workhorse across industrial sectors, producing precision components such as pumps, valves, hydraulic fittings, bearing housings, and custom fixtures with consistent accuracy across both prototyping and high-volume production runs.
Advantages of CNC Turning
High Efficiency for Rotational Parts
Optimized for axisymmetric components like shafts, bolts, and rollers, CNC turning removes material rapidly along the rotational axis for fast, efficient production.
Excellent Precision and Repeatability
Modern CNC lathes deliver tight, repeatable tolerances across thousands of parts, with precision determined by geometry, material, setup, and inspection requirements.
Superior Surface Finish
CNC turning typically delivers a smooth, consistent surface finish, reducing or eliminating the need for secondary polishing.
Material Versatility
Compatible with a wide range of metals including aluminum, stainless steel, brass, copper, titanium, and exotic alloys, as well as engineering plastics such as POM, PEEK, PTFE, and ABS.
CNC Turning: Breakdown of the Basics
What is CNC Turning
CNC turning, also known as computer numerical control turning, is a subtractive manufacturing process used to create precise parts with rotational symmetry. The workpiece rotates while a cutting tool moves along controlled axes to remove material and create cylindrical or rotationally symmetric features.
Ideal for parts with a circular cross-section, CNC turning offers high-precision, repeatable production across a wide range of materials including metals and plastics. Modern CNC lathes can perform multiple operations such as facing, turning, grooving, and threading in a single setup, making it a highly efficient and automated manufacturing solution.
CNC Turning Process
1. Workpiece Setup: The raw material such as bar stock or tube is secured in the lathe's chuck or between centers.
2. Programming: A CNC program defines the cutting tool's movements, specifying speed, feed rate, and toolpath to achieve the desired geometry.
3. Machining: The CNC program executes, driving the spindle and cutting tool to remove material from the workpiece according to the programmed instructions.
4. Part Removal: Once complete, the finished part is removed and the process repeats for the next piece.
Quality Assurance & Inspection
We adhere to a strict multi-stage inspection protocol to ensure every part meets your exact specifications.
Full FAI Documentation: Every order includes a First Article Inspection report (upon request).
Precision Metrology: We utilize state-of-the-art CMM (Coordinate Measuring Machines), profilometers for surface roughness, and calibrated hand tools.
Traceability: All material certifications and heat treatment reports are archived and available for audit.
Standards Compliance: Our quality systems are aligned with international ISO 9001 standards, covering dimensional, geometric (GD&T), and material requirements.
For more details on our quality standards, check out our Inspection Checklist (including both standard and premium options).
FAQs About CNC Turning
What type of CAD files do you accept for CNC quoting?
We accept both 3D models and 2D drawings. For instant geometry analysis and baseline pricing, please upload your 3D CAD files in STEP, STP, or IGS formats. If your part requires specific tight tolerances, GD&T callouts, or threaded holes, a supplementary 2D drawing in PDF, DWG, or DXF format is required.
What is your Minimum Order Quantity (MOQ)?
We have no strict Minimum Order Quantity (MOQ = 1). Whether you need a single rapid prototype for design validation or a low-volume production run of thousands of parts, our flexible manufacturing network is built to scale with your project efficiently and cost-effectively.
What is the typical lead time for custom CNC machined parts?
Our standard manufacturing lead time for most CNC projects is 5 business days. For exceptionally simple parts or urgent prototyping needs, we can expedite production and ship in as fast as 1 day. (Please note: Lead times may vary depending on part complexity, total quantity, and any secondary surface finishes required.)
Will my design and 3D models be kept confidential?
100% Yes. We take intellectual property (IP) protection and data security incredibly seriously. We are proudly ISO 27001 Certified for information security management. Your files are encrypted and shared exclusively with essential engineering staff. We are also fully prepared to sign your Non-Disclosure Agreement (NDA) before you share any CAD files.
Do you provide material certificates and inspection reports?
Absolutely. By default, every order includes a standard Dimensional Tolerance Report. For production volume orders, we supply comprehensive First Article Inspection (FAI) reports. If your critical components require ultra-precision metrology, full CMM (Coordinate Measuring Machine) inspection is available for an additional fee.
For a deep dive into our quality control processes, please read our guide on Unionfab QC & Inspection Capabilities.
