Precision CNC Milling Manufacturing Services
Delivering high-precision, complex geometries with industry-leading turnaround times. Partner with XML for expert metal machining, from rapid prototyping to scalable, high-volume manufacturing.
- Ultra-Tight Tolerances: Consistently achieving precision down to +/- 0.005mm.
- Advanced Capabilities: State-of-the-art 3, 4, and 5-axis CNC machining centers.
- Flexible Production: Seamless transition from single-part prototypes to mass production.
Certifications : ISO 9001:2015 | AS9100D | ITAR Registered
Our CNC Milling Capabilities
At XML, our machine shop is equipped with cnc milling machiningadvanced technology to handle the most demanding specifications. Here is an overview of our core milling parameters:
Machining Types: 3-Axis, 4-Axis, and 5-Axis CNC Milling.
Max Part Size: Up to 1000mm x 600mm x 500mm
Standard Tolerances: +/- 0.01mm (Tighter tolerances up to +/- 0.005mm available upon request depending on part geometry and material).
Production Volume: Highly flexible, ranging from 1 to 100,000+ units.
a milling is widely applied in medical devices, aerospace, automotive, electronics, and other precision-critical industries.
CNC Milling Tolerances
| Nominal Size | Plastics (ISO 2768-m) | Metals (ISO 2768-f) |
| 0.5mm ~ 3mm | ±0.1 mm | ±0.05 mm |
| >3mm ~ 6mm | ±0.1 mm | ±0.05 mm |
| >6mm ~ 30mm | ±0.2 mm | ±0.1 mm |
| >30mm ~ 120mm | ±0.3 mm | ±0.15 mm |
| >120mm ~ 400mm | ±0.5 mm | ±0.2 mm |
| >400mm ~ 1000mm | ±0.8 mm | ±0.3 mm |
| >1000mm ~ 2000mm | ±1.2 mm | ±0.5 mm |
| >2000mm ~ 4000mm | ±2.0 mm | – |
3-axis CNC milling
| Parameter | Metals | Plastics |
| Max. Part Size (LxWxH) | 2300 x 1000 x 650 mm(90.5 x 39.5 x 25.6 in) | 2300 x 1000 x 650 mm(90.5 x 39.5 x 25.6 in) |
| Min. Feature Size | 0.50 mm (0.019 in) | 0.50 mm (0.019 in) |
| Typical Tolerances | ±0.01 mm (±0.0004 in) | ±0.01 mm (±0.0004 in) |
| Surface Finish | Ra 0.8 μm (Ra 32 μin) | Ra 1.2 μm (Ra 47.5 μin) |
| Max. Cutting Feed Rate | 20,000 mm/min (785 in/min) | 20,000 mm/min (785 in/min) |
| Spindle Speed | Up to 20,000 RPM | Up to 20,000 RPM |
| Tool Change Time | 3.3s | 2.2s |
4-axis CNC milling
| Parameter | Metals | Plastics |
| Max. Part Size (LxWxH) | 2100 x 1800 x 500 mm(82.6 x 70.8 x 19.7 in) | 2100 x 1800 x 500 mm(82.6 x 70.8 x 19.7 in) |
| Min. Feature Size | 0.2 mm (0.008 in) | 0.2 mm (0.008 in) |
| Typical Tolerances | ±0.01 mm (±0.0004 in) | ±0.03 mm (±0.0012 in) |
| Surface Finish | Ra 0.8 μm (Ra 32 μin) | Ra 1.2 μm (Ra 47.5 μin) |
| Max. Cutting Feed Rate | 30,000 mm/min (1180 in/min) | 54,000 mm/min (2126 in/min) |
| Spindle Speed | Up to 20,000 RPM | Up to 20,000 RPM |
| Tool Change Time | 3.3s | 2.2s |
5-axis CNC milling
| Parameter | Metals | Plastics |
| Max. Part Size (LxWxH) | 1385 x 1200 x 900 mm(54.53 x 47.24 x 35.43 in) | 1385 x 1200 x 900 mm(54.53 x 47.24 x 35.43 in) |
| Min. Feature Size | 0.1 mm (0.004 in) | 0.1 mm (0.004 in) |
| Typical Tolerances | ±0.01 mm (±0.0004 in) | ±0.03 mm (±0.0012 in) |
| Surface Finish | Ra 0.8 μm (Ra 32 μin) | Ra 1.2 μm (Ra 47.5 μin) |
| Max. Cutting Feed Rate | 50,000 mm/min (1968 in/min) | 50,000 mm/min (1968 in/min) |
| Spindle Speed | Up to 20,000 RPM | Up to 20,000 RPM |
| Tool Change Time | 0.9s | 0.9s |
Comprehensive CNC Milling Machine Milling Materials Portfolio
We provide precision multi-axis milling solutions across a vast array of industrial-grade metals, advanced polymers, and challenging exotic alloys.
We machine a comprehensive range of structural and high-conductivity metals to exact specifications. From lightweight aluminum and rigid stainless steels to highly challenging materials like high-conductivity pure copper . Our advanced multi-axis milling centers ensure exceptional surface finishes and tight tolerances for your most critical load-bearing or thermal management components.
Achieving tight tolerances on polymers requires specialized tooling and strict thermal control. We expertly mill a wide spectrum of engineering plastics—including POM (Delrin), PEEK, Nylon, and PTFE. Our specialized plastic milling process delivers stress-free, burr-free components that are ideal for medical devices, electronics insulators, and lightweight fluid handling applications.
For components operating in extreme environments, standard materials often fall short. Our facility is fully equipped to process hard-to-machine superalloys like Inconel and Hastelloy, as well as specialized composites like G10/FR4. We provide robust, high-precision milling solutions designed to withstand extreme temperatures, corrosion, and wear in the aerospace, defense, and energy sectors.
milling machine milling Surface Finishing Options
To provide a complete, one-stop manufacturing solution, XML offers a wide range of premium surface finishes to enhance the durability, aesthetics, and functionality of your milled parts:
Anodizing enhances corrosion resistance and allows for vibrant color finishes on aluminum parts.
Electroplating adds a thin, protective metal coating to improve durability and appearance.
Polishing smooths the surface to achieve a shiny, mirror-like finish for enhanced aesthetics 
Powder coating provides a durable, colored finish that resists chipping, scratching, and fading.
Electrophoretic coating provides a smooth, bonded protective layer, improving durability, aesthetic appeal.
Material Selection for CNC Milling Machine Mill Services
Precision Manufacturing
Materials We Mill
Our cnc milling machine milling Core Machining Expertise
We machine a vast array of materials, but the XML facility is uniquely optimized for the high-precision CNC milling of four core metals:
Pure Copper (C101, C110): We have mastered the intricate process of pure copper machining, overcoming its high ductility to deliver flawless surface finishes and strict dimensional accuracy.
Stainless Steel (304, 316, 17-4PH): Utilizing rigid setups and expert parameters, we machine tough stainless steel to exacting tolerances for highly durable, corrosion-resistant parts.
Aluminum Alloys (6061, 7075, 5083): We excel at high-speed machining, offering rapid turnarounds, complex geometries, and pristine finishes for lightweight applications.
Steel & Iron (1018, 4140, etc.):
We provide precision cnc milling services robust, highly precise machining for structural and heavy-duty steel components requiring exceptional strength and wear resistance.
Other Supported Materials: Brass, Titanium, Magnesium, and Engineering Plastics (PEEK, POM/Delrin, ABS, Nylon, Polycarbonate, PTFE).
Metal materials
| Material | Properties | Applications | Grades |
| Aluminum | Lightweight, high strength-to-weight ratio, corrosion resistance | Aerospace components, automotive parts, medical devices | 6061, 7075, 2024, 5083 |
| Steel | High strength, durability, wear resistance, low cost | Structural components, machinery parts, automotive components | 1018, 1045, 4140, 4340 |
| Stainless Steel | Corrosion resistance, high strength, heat resistance, aesthetic appearance | Medical devices, food processing equipment, marine parts | 304, 316, 303, 416 |
| Brass | Good machinability, electrical conductivity, corrosion resistance | Fittings, valves, gears, electrical components | C360 (Free-machining), C260 (Cartridge) |
| Copper | Electrical and thermal conductivity, corrosion resistance, ductility | Electrical components, heat exchangers, plumbing fittings | C101 (Oxygen-free), C110 (Electrolytic Tough Pitch) |
| Titanium | Strength-to-weight ratio, corrosion resistance, biocompatibility | Aerospace components, medical implants, high-performance automotive parts | Grade 2 (Commercially Pure), Grade 5 (Ti-6Al-4V) |
| Magnesium | Lightweight, machinability, strength-to-weight ratio, thermal conductivity | Aerospace components, automotive parts, electronic housings | AZ31B, AZ91D |
| Inconel | High strength, oxidation and corrosion resistance, extreme temperature tolerance | Aerospace engines, gas turbines, chemical processing equipment | Inconel 625, Inconel 718 |
| Tool Steel | Hardness, abrasion resistance, cutting edge retention at elevated temperatures | Cutting tools, dies, molds, wear-resistant parts | D2, A2, O1, M2 |
| Nickel Alloys | Strength and toughness, high-temperature resistance, corrosion resistance | Aerospace components, chemical processing, oil and gas industry | Monel 400, Hastelloy C276 |
| Plastic | Lightweight, corrosion resistance, insulator, flexibility | Packaging, consumer goods, automotive interiors | ABS, Polycarbonate, PVC, Nylon |
| Carbon Fiber | Strength-to-weight ratio, stiffness, low thermal expansion | Aerospace components, sporting goods, automotive parts | Standard Modulus, Intermediate Modulus, High Modulus |
| Glass | Transparency, hardness, chemical resistance, thermal insulation | Windows, optical components, laboratory equipment | Borosilicate, Soda-lime, Fused Silica |
| Ceramic | Hardness, wear resistance, thermal stability, electrical insulation | Cutting tools, medical implants, heat shields | Alumina, Zirconia, Silicon Carbide, Silicon Nitride |
| Rubber | Elasticity, impact resistance, weather resistance, electrical insulation | Seals, gaskets, tires, vibration dampening | Natural Rubber, EPDM, Neoprene, Silicone Rubber |
| Composite | High strength, lightweight, customizable properties | Aerospace components, automotive parts, sporting goods | Fiberglass, CFRP, Kevlar |
| Lead | Density, radiation shielding, corrosion resistance, malleability | Radiation shielding, batteries, weights | Pure Lead, Lead-Tin Alloy, Lead-Antimony Alloy |
| Bronze | Corrosion resistance, wear resistance, machinability, appearance | Bearings, bushings, sculptures, marine hardware | C932 (Bearing Bronze), C954 (Aluminum Bronze), C903 (Tin Bronze) |
| Tungsten | High melting point, hardness, density, thermal conductivity | Cutting tools, electrical contacts, filaments | Pure Tungsten, Tungsten Carbide, Tungsten Copper Alloy |
| Zinc | Corrosion resistance, casting properties, low melting point, conductivity | Galvanizing, die casting, batteries, construction materials | Zamak, Zinc-Aluminum Alloy, Pure Zinc |
Plastic materials
| Material | Properties | Applications |
| ABS | Good impact resistance, toughness, machinability, dimensional stability, easy bonding with adhesives | Prototypes, automotive components, consumer electronics housings, enclosures |
| PC (Polycarbonate) | High impact resistance, good optical clarity, excellent toughness, thermal resistance | Optical components, safety helmets, medical devices, electronic housings |
| PMMA (Acrylic) | Excellent optical clarity, good weather resistance, moderate strength, easy to machine and polish | Display cases, signs, lenses, light guides, aquariums |
| PA (Nylon) | High mechanical strength, abrasion resistance, low friction, chemical resistance | Gears, bearings, bushings, wear-resistant components |
| POM (Delrin) | High stiffness, low friction, excellent dimensional stability, good wear resistance | Precision parts, gears, bearings, rollers, automotive components |
| PTFE | Exceptional chemical resistance, low friction, high-temperature resistance, non-stick properties | Seals, gaskets, electrical insulation, chemical processing equipment |
| PVC | Good chemical resistance, high rigidity, flame retardant, easy to machine | Piping, fittings, valves, electrical insulation |
| PE | High impact resistance, low friction, excellent chemical resistance, good wear resistance | Containers, liners, wear strips, marine applications |
| PP (Polypropylene) | Good chemical resistance, high fatigue resistance, low density, moisture resistance | Chemical tanks, automotive components, living hinges, medical devices |
| PEEK | High mechanical strength, excellent chemical resistance, high-temperature performance, good wear resistance | Aerospace components, medical implants, high-performance automotive parts, electrical connectors |
| PU (Polyurethane) | High flexibility, good impact resistance, abrasion resistance, good mechanical properties | Seals, gaskets, wheels, custom molded components |
| Teflon (PTFE) | Extremely low friction, excellent chemical resistance, high-temperature stability, non-stick surface | Seals, gaskets, bearings, non-stick coatings |
Why Choose XML for Precision CNC Milling Services？
Advanced Equipment
State-of-the-art Swiss CNC machines ensure exceptional precision, repeatability, and efficiency.
24/7 Engineering Support
Our engineers provide continuous technical support, from design review to production optimization.
Fast Turnaround
Streamlined workflows and dedicated project management enable quick and reliable delivery.
Competitive Pricing
Optimized processes and in-house production help customers save 30–40% without sacrificing quality.
Define Milling Excellence: Ready to Start Your Swiss CNC Manufacturing Project?
Have questions or need a quote? Fill out the form below and our specialists will respond promptly. From materials and tolerances to lead times and quality requirements, we’re here to support your project every step of the way.
FAQs – Milling Machine Milling
From materials and quality to turnaround times, find what you need to know here. If you have more questions, we’re just a message away
In CNC milling, the workpiece remains stationary while a multi-point cutting tool rotates to remove material. In CNC turning, the workpiece itself rotates at high speeds against a stationary, single-point cutting tool. Milling is typically used for complex, flat, or asymmetric parts, while turning is ideal for cylindrical shapes.
Our standard CNC milling tolerance is +/- 0.01mm. However, depending on the specific material and part geometry, our advanced equipment can hold tighter tolerances down to +/- 0.005mm upon request.
We pride ourselves on speed. Quotes are typically provided within 24 hours. Lead times for actual production depend on the project's complexity and volume, but rapid prototypes can often be shipped in as little as 3 to 5 business days.
At XML, we do not have a strict Minimum Order Quantity (MOQ). We are highly flexible and fully equipped to support you through every stage of your project—from manufacturing a single rapid prototype for testing to scaling up to high-volume production runs of 100,000+ units.
What Is CNC milling?
1. Definition milling and Core Mechanism
CNC Milling is a subtractive manufacturing process where a rotating multi-point tool removes material from a stationary workpiece. While CNC turning rotates the part, milling rotates the tool to create flat surfaces, slots, and complex 3D shapes on non-cylindrical parts.
2. Key Manufacturing Advantages
Complexity & Versatility: Multi-axis movement (3, 4, or 5-axis) enables the creation of intricate geometries and organic shapes impossible for manual machines.
Extreme Precision: Computer-driven controls ensure ultra-tight tolerances (up to ±0.001 inches), maintaining perfect consistency across high-volume runs.
Superior Surface Finish: Specialized end mills and finishing tools produce smooth, professional surfaces, minimizing the need for manual polishing.
Diverse Tooling: A wide range of cutters—from ball nose to face mills—allows for various features like pockets, holes, and contours in a single setup.
3. Material Versatility
CNC milling is highly adaptable and can process a vast range of solid materials:
Metals: Aluminum, Steel, Titanium, and Brass.
Plastics: ABS, PEEK, and Polycarbonate.
Composites: Carbon fiber, wood, and technical ceramics.
This makes it the preferred choice for aerospace, medical, and automotive precision components.
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