FROM IDEA TO LAUNCH, NPI MADE SIMPLE
Custom Mill-Turn Machining Service
From prototype to production, all in one streamlined process.Upload 3D/2D files to get an free quote.
3 / 4 / 5-Axis CNC Machining
Metals · Plastics · Ceramics · Tungsten Carbid
✔ NDA Available ✔ Engineering Support ✔ ISO-Certified
Trusted by engineers, manufacturers, and global brands worldwide, with10000+ customers across 100+ countries and regions.
Precision Mill-Turn Machining Services for Complex Parts
Automation | Medical | Aerospace | Electronics | Automotive| Communications
Our mill-turn machining services are ideal for components that require both rotational and prismatic features within a single manufacturing process. By integrating CNC turning and multi-axis milling in one advanced machine platform, we manufacture high-precision parts with excellent concentricity, feature alignment, and surface integrity.
Mill-turn machining is a hybrid subtractive process that enables turning, milling, drilling, and threading operations to be completed in a single setup. This approach eliminates secondary machining and reduces tolerance stack-up, allowing complex features such as off-center holes, flats, slots, threads, and contoured surfaces to be produced efficiently while improving dimensional consistency, minimizing handling errors, and ensuring reliable repeatability.
Advanced Integrated Machining Capabilities
We support complex part requirements through:
- Complete machining in a single clamping
- Off-axis features such as flats, cross-holes, and slots
- Complex multi-surface geometry on turned components
- Improved positional accuracy between milled and turned features
- Enhanced consistency across high-precision parts
Flexible Production from Prototype to Volume
Mill-turn technology significantly reduces setup time and manual intervention, making it ideal for both prototype development and production manufacturing. By minimizing part transfers and re-fixturing, we ensure stable quality, shorter lead times, and repeatable precision from low-volume runs to full-scale production.
This streamlined process improves manufacturing efficiency while maintaining tight tolerances and reliable part integrity.
Precision Mill-Turn Machining Material Options
Mill-turn machining requires materials that can perform reliably across both turning and milling operations within a single setup. To support this integrated process, we offer a wide selection of materials including metals, engineering plastics, ceramics, and other advanced materials suitable for both functional prototypes and production components.
Choosing the right material helps maintain dimensional stability between rotational and prismatic features, ensuring consistent accuracy during multi-operation machining. Materials with balanced strength and machinability can improve cutting stability, reduce deformation, and enhance overall part quality.
Key Considerations
- Different material types respond differently to combined turning and milling forces
- Hard or brittle materials may require secondary finishing processes
- Material properties can influence achievable tolerances and machining efficiency
- Functional and industry requirements should be clearly defined in part drawings
| Image | Material | Typical Grades | Surface Finishes | Industries |
|---|---|---|---|---|
 |
Aluminum Alloys | 6061, 7075, 2024, 5052 | As-machined, Anodizing, Hard anodizing, Chromate conversion, Powder coating, Bead blasting, Polishing | Aerospace, Automotive, Electronics, Enclosures |
 |
Carbon Steel | 1018, 1045, 1060 | As-machined, Black oxide, Phosphate coating, Polishing | Industrial Machinery, Automation Equipment |
 |
Stainless Steel | 303, 304, 316, 17-4 PH | As-machined, Passivation, Electropolishing, Bead blasting, Polishing | Medical Devices, Food Processing Equipment, Marine |
 |
Copper | C101, C110 | As-machined, Polishing, Anti-oxidation treatment | Electrical Components, Thermal Management |
 |
Brass | C360, C385 | As-machined, Polishing, Bead blasting | Valves, Fittings, Precision Instrumentation |
 |
Bronze | C932, C954 | As-machined, Polishing | Bearings, Bushings, Wear Parts |
| Material | Typical | Surface Finishes | Industries |
|---|---|---|---|
| Tool Steel | D2, H13, A2 | As-machined, Heat treatment, Polishing, Nitriding | Mold & Die, Tooling |
| Titanium Alloys | Grade 2, Ti-6Al-4V | As-machined, Bead blasting, Polishing, Anodizing | Aerospace, Medical, Performance parts |
| Nickel Alloys | Inconel 625, 718 | As-machined, Polishing | Aerospace, Energy |
| Image | Material | Typical / Grades | Surface Finishes | Industries / Applications |
|---|---|---|---|---|
 |
Engineering Plastics | ABS, POM (Acetal), Nylon (PA), PC, PET, PPS | As-machined, Polishing, Vapor smoothing | Prototyping, Consumer products, Electronics housings |
 |
Specialty Engineering Plastics | Acetal (POM-C, POM-H), HDPE, LDPE, PBT | As-machined, Polishing, Vapor smoothing | Industrial parts, Packaging, Consumer goods |
 |
Nylon & Filled Nylon | PA6, PA66, Glass-filled Nylon, Carbon-filled Nylon | As-machined, Polishing | Gears, Bearings, Mechanical components |
 |
Food-Grade Plastics | HDPE, UHMW-PE, POM (FDA grade), PP, PC | As-machined, Polishing, Flame polishing | Food processing equipment, Containers, Gears, Valves, Medical device parts |
 |
Transparent Plastics | PMMA (Acrylic), PC (Polycarbonate), PETG | As-machined, Polishing, Flame polishing, Vapor smoothing | Display panels, Optical components, Protective covers, Lighting |
 |
Optical / High-Gloss Plastics | PMMA, Optical-grade PC, COC | Polishing, Flame polishing, Vapor smoothing | Lenses, Light guides, Medical optics |
 |
High-Performance Plastics | PEEK, PTFE, PPS, UHMW, LCP | As-machined, Polishing, Annealing | Medical devices, Chemical equipment, Semiconductor parts, Aerospace |
| Image | Material | Typical / Grades | Surface Finishes | Industries / Applications |
|---|---|---|---|---|
 |
Alumina (Al₂O₃) | 99%, 96%, 95% purity | Fine grinding, Precision polishing | Semiconductor, Insulation, Wear parts, Mechanical components |
|
Zirconia (ZrO₂) | 3Y-TZP, 8Y, Fully stabilized | Precision grinding, Polishing | Medical implants, Valves, Pump components, High-precision parts |
|
Silicon Nitride (Si₃N₄) | SN-101, SN-201, Gas pressure sintered | Precision grinding, Polishing | High-temperature bearings, Aerospace, Cutting tools |
|
Aluminum Nitride (AlN) | High purity, Sintered | Precision grinding, Polishing | Electronics, Heat sinks, Insulation |
 |
Silicon Carbide (SiC) | Reaction bonded, Sintered, Hot-pressed | Precision grinding, Diamond polishing | Wear-resistant components, High-temperature parts, Industrial tooling |
|
Tungsten Carbide (WC) | Cemented carbide, Cobalt bonded | Precision grinding, Polishing (limited) | Tooling, Mold & Die, Wear-resistant components |
Mill-Turn Machining Tolerances
Mill-turn machining provides high-precision components by combining turning and milling operations in a single setup. By completing both rotational and non-rotational features without multiple re-fixturing steps, mill-turn technology minimizes cumulative errors and ensures superior alignment between turned and milled features. Actual achievable tolerances depend on the machine type, material, part geometry, and workpiece size.
| Feature Type | Typical Tolerance | High-Precision Option |
|---|---|---|
| Linear dimensions (turning/milling) | ±0.02 – 0.05 mm | ±0.005 – 0.02 mm |
| Diameters (turned features) | ±0.015 – 0.03 mm | ±0.005 – 0.01 mm |
| Holes, slots, and pockets | ±0.02 – 0.05 mm | ±0.01 – 0.02 mm |
| Angularity / Parallelism / Perpendicularity | ±0.02° – 0.05° | More precise upon request |
| Concentricity / Runout | 0.02 – 0.03 mm | 0.01 mm |
| Surface finish (Ra) | 0.8 – 3.2 μm | 0.4 – 0.8 μm |
Note: The values in the tables are based on industry reference standards; actual tolerances may vary depending on the machine, material, and part size.
| Machining Type | Accuracy Advantage | Notes |
|---|---|---|
| Standard CNC (Turning or Milling) | Standard linear: ±0.02 – 0.05 mm | Multiple setups increase cumulative errors on complex geometries |
| Mill-Turn | Linear: ±0.01 – 0.03 mm | Single setup for turning and milling reduces positioning errors; better concentricity and angular precision |
| High-Precision Mill-Turn | Linear: ±0.005 – 0.02 mm | High-precision machines, precision fixtures, and suitable materials maintain tight tolerances even on complex multi-feature parts |
Notes:
- Accuracy depends on machine type, material, part size, and geometry.
- Mill-Turn machining is particularly advantageous for parts with combined rotational and prismatic features.
- For simple single-feature parts, the precision advantage is less pronounced but still reduces handling and setup errors.
Precision & Quality You Can Trust
At HUB Machining, we ensure every part meets the highest standards. From material inspection to final measurement, our rigorous quality control process guarantees consistent, reliable results for your custom components.
Material Verification
Inspect raw materials to ensure compliance with specifications and traceability.
In-Process Inspection
Monitor each machining step with advanced measuring equipment to maintain precision.
First Article Inspection (FAI)
Verify the first part against design drawings and specifications to ensure production accuracy before full-scale manufacturing.
Final Testing & Certification
Conduct thorough dimensional checks, surface inspections, and testing before delivery, ensuring every part meets your expectations.
Multi-Industry Manufacturing Solutions for Global Customers
We serve customers worldwide with reliable manufacturing solutions across multiple industries, including aerospace, automotive, medical, and industrial automation. With efficient production and global logistics, parts can be delivered in as little as 5–10 days.
WHY HUB MACHINING?
Your Reliable Manufacturing Partner
Your Reliable Manufacturing Partner
NPI prototyping bridges early concepts to full-scale production.
Based on customer-provided designs, our team evaluates feasibility,
identifies risks, and validates performance.
Concept & Design Review
Your design, we review feasibility and manufacturability.
DFM feedback optimizes structure, tolerance, and lead time.
Rapid Prototyping & EVT
Fast prototypes validate function, fit, and assembly.
Design iterations are refined through EVT testing.
Pilot Run
Small-batch production verifies process stability and yield.
Quality and consistency are evaluated before scale-up.
Mass Production Launch
Validated processes enable stable, scalable manufacturing.
Consistent quality and reliable delivery are ensured.
Customer Success Case
HUB partners with companies across the automotive, aerospace, medical, electronics, and robotics industries, supporting projects at every stage—from early-stage prototyping to full-scale production. From individual innovators to Fortune 500 enterprises, we deliver trusted CNC machining solutions with precision, quality, and reliability worldwide.
Customer Reviews
“Excellent machining quality and tight tolerances. Parts fit perfectly right out of the box.”
Eric Thompson
“The surface finish exceeded our expectations — looks production-ready.”
Lukas Weber
“They helped us validate our design quickly with prototypes, and the transition to mass production was seamless.”
Julien Moreau
How To Work With US
01
Upload Files
Upload your 2D/3D design files and share key project details.
02
DFM Review
Our engineers optimize your design for manufacturability, quality, and cost efficiency.
03
Confirm & Produce
Approve the quote and start precision machining with our experienced team.
04
Receive Parts
Get high-quality custom parts delivered straight to your door, ready to use.
FAQS
Yes. We can provide various inspection documents upon request, including First Article Inspection (FAI) reports, dimensional inspection reports, material certificates, Certificates of Conformance (CoC), and other quality documentation to support your project and compliance requirements.
We use a wide range of precision inspection equipment, including Coordinate Measuring Machines (CMM), digital calipers, micrometers, height gauges, thread gauges, pin gauges, bore gauges, and other measuring instruments. Our inspection process ensures that every component meets the required dimensional and quality standards.
Yes. We provide hardware installation services as part of our assembly process. We can install screws, nuts, bolts, threaded inserts, rivets, PEM fasteners, standoffs, pins, and other standard hardware according to your drawings and assembly specifications, ensuring secure and accurate installation.
Anodizing is an electrochemical process that creates a durable oxide layer on the surface of aluminum, improving corrosion resistance, wear resistance, and hardness while maintaining a metallic appearance. Powder coating applies a protective polymer coating that provides excellent durability, impact resistance, and a wide range of color options. Anodizing is suitable only for aluminum, while powder coating can be applied to aluminum, steel, and other metals. The best choice depends on your application, performance requirements, and desired appearance.
Yes. We offer anodizing in a variety of standard colors, including clear (natural), black, red, blue, gold, and other custom colors, depending on the material and project requirements. Anodizing not only enhances the appearance of aluminum parts but also improves corrosion resistance, wear resistance, and surface hardness. If you have specific color requirements, we can match them as closely as possible.
The best surface finish depends on your application, material, operating environment, and appearance requirements. For example, anodizing improves corrosion resistance for aluminum, powder coating provides a durable decorative finish, while plating enhances wear resistance and electrical conductivity. Our engineering team can recommend the most suitable finishing process based on your functional and aesthetic requirements.
Yes. We offer a variety of RoHS-compliant surface finishing options, including anodizing, powder coating, passivation, zinc plating, electroless nickel plating, and other environmentally compliant treatments. If your project requires RoHS, REACH, or other regulatory compliance, please let us know during the quotation stage.
Surface finish quality is inspected through visual examination, dimensional verification, and process-specific quality checks. We evaluate appearance, coating uniformity, color consistency, adhesion, and surface defects. When required, we also verify surface roughness and coating thickness using professional inspection equipment to ensure compliance with customer specifications.
Some surface finishing processes can slightly affect part dimensions by adding or removing a thin layer of material. Processes such as anodizing, plating, and powder coating may change surface thickness, while polishing can remove a small amount of material. If your project has critical tolerances, our engineering team will consider the finishing process during manufacturing to ensure the final part meets your specifications.
Yes. We understand the importance of protecting your intellectual property. We are happy to sign a Non-Disclosure Agreement (NDA) before reviewing your drawings or project information. All customer data is handled with strict confidentiality throughout the entire manufacturing process.
All parts are carefully inspected and securely packaged before shipment. Depending on the product type, we use protective wrapping, foam inserts, individual bags, custom cartons, and export-grade wooden crates to ensure the parts arrive safely and in excellent condition.
We accept secure payment methods, including bank transfer (T/T) and PayPal for eligible orders. Payment terms may vary depending on the project scope and order value. Please contact our sales team for specific payment arrangements.
Lead times depend on the manufacturing process, material, quantity, and part complexity. Prototype orders are typically completed within 3–10 business days, while production orders generally require 2–6 weeks. A confirmed lead time will be provided with every quotation.
Yes. We regularly ship CNC machined parts to customers in North America, Europe, Australia, and other global markets. Parts are carefully packaged to prevent damage during transportation, and we support express, air, and sea freight options.
Quality is controlled throughout the manufacturing process, from incoming material inspection to in-process checks and final inspection. We use precision measuring equipment such as CMMs, calipers, micrometers, and height gauges to verify critical dimensions before shipment.
We provide a full range of surface finishing services, including anodizing, powder coating, plating, polishing, sandblasting, brushing, painting, passivation, black oxide, and laser marking to meet both functional and cosmetic requirements.
Yes. Our engineers review every project and provide DFM recommendations to improve manufacturability, reduce machining time, optimize material usage, and lower production costs without compromising product performance.
Most quotations are provided within 24 hours after receiving your drawings and project requirements. Complex assemblies or high-volume projects may require additional engineering review.
We accept most standard CAD formats, including STEP (.stp), IGES (.igs), X_T, Parasolid, SolidWorks, DWG, DXF, STL, and PDF drawings. If you are unsure about your file format, simply send it to our engineering team for review.
Yes. We specialize in both rapid prototyping and full-scale production. Whether you need a single prototype, low-volume batches, or mass production, we can provide flexible manufacturing solutions with consistent quality.
Standard machining tolerance is typically ±0.01 mm. For precision components, tighter tolerances can be achieved depending on the material, geometry, and manufacturing process. Our engineering team reviews each project to ensure the required accuracy is met.
We machine a wide variety of materials, including aluminum, stainless steel, carbon steel, brass, copper, titanium, magnesium, POM, ABS, Nylon, PEEK, PTFE, acrylic, and other engineering plastics. Material recommendations are also available based on your application.
HUB Machining provides comprehensive CNC machining services, including CNC milling, CNC turning, 5-axis machining, Swiss machining, EDM, and precision grinding. We support both rapid prototyping and high-volume production for a wide range of industries.
Yes. We are capable of assembling multi-component and complex sub-assemblies, ensuring correct alignment and proper assembly, followed by quality inspection.
We use professional packaging and secure fixation methods. All shipped assemblies come with a quality inspection report so you can perform final testing upon receipt.
