Custom CNC Milling Services
CNC milling is the core of our CNC machining services. We have advanced 3-axis, 4-axis and 5-axis machining capabilities to manufacture custom parts with high precision. Whether it is prototype or production, our CNC milling services ensure fast turnaround and high quality.
Our CNC Milling Capabilities
3-Axis CNC Milling
3-axis CNC milling is an economic and efficient solution that is ideal for machining parts with simple geometries and flat surfaces.
4-Axis CNC Milling
4-axis CNC milling adds rotary capability, allowing more complex cutting on multiple angles without relocating the part, improving accuracy and efficiency.
5-Axis CNC Milling
5-axis CNC milling offers outstanding versatility for machining parts with curved surfaces or complex geometries, and ensures excellent precision and finish.
Top Advantages of CNC Milling
CNC milling is a highly versatile and precise manufacturing method, offering efficiency, repeatability, and quality for prototyping and full production.
High Precision and Consistency
CNC milling machines achieve ±0.005mm tolerances, ensuring parts meet design specs. Automated control ensures consistent accuracy in batches, ideal for aerospace, medical, and electronics industries.
Wide Material Compatibility
CNC milling supports various materials, including metal,plastic,ceramic and composite materials, allowing selection based on mechanical properties, weight, corrosion resistance, or cost.
Fast Turnaround Times
CNC milling is highly efficient for rapid prototyping or small-batch production, delivering functional parts within days with optimized tool paths, multi-axis machines, and minimal manual intervention.
Excellent Surface Finish
CNC milling offers smoother surfaces and sharp edges, often eliminating the need for post-processing, which is especially advantageous for tight-assembly parts and customer-facing components.
Cost-Effective for Mid to Low Volumes
For custom, complex, or low-to-medium volume production, CNC milling offers great value without the need for costly molds or tooling, making it perfect for both one-offs and recurring projects.
Scalability from Prototypes to Production
Start with a single prototype and scale seamlessly. Our CNC milling capabilities support full production without compromising quality, even as your volume grows.
Materials Used in CNC Milling
CNC Milling is a precise, adaptable process for creating complex geometries in various materials. FastPreci provides tailored CNC milling services for parts’ unique performance and dimensional needs, serving aerospace, medical, robotics, automotive, and consumer electronics industries. At FastPreci, we know each material has unique challenges. Our CNC milling is built to tackle these, ensuring your parts meet top standards of performance, accuracy, and finish.
Metals
CNC Milling excels with metals, producing strong, precise parts. Key metals:
Aluminum
Lightweight, corrosion-resistant, and highly machinable, aluminum is widely used in aerospace and electronics. CNC Milling provides exceptional detail for parts like heat sinks, housings, and structural frames.
Stainless Steel
Its strength and corrosion resistance make it perfect for medical tools, industrial equipment, and mechanical components. CNC Milling guarantees clean edges and precise tolerances.
Brass
With excellent machinability and aesthetic appeal, brass is commonly used for decorative hardware, connectors, and fittings. CNC Milling delivers consistent results with a smooth finish.
Titanium
Combining strength, low weight, and corrosion resistance, it’s used in aerospace and medical devices. CNC Milling enables precise shaping of titanium parts for demanding applications.
Plastics
CNC Milling supports various engineering plastics for lightweight, corrosion-resistant components in industries such as automotive, food processing, and healthcare.
POM
Stiff, stable, wear-resistant, ideal for gears, rollers, precision bushings. CNC Milling maintains tight tolerances, smooth surfaces.
PTFE
Valued for its chemical resistance and low friction, PTFE is commonly used in seals, gaskets, and lab equipment. CNC Milling allows for detailed shaping with high accuracy.
Nylon
A durable material with good mechanical strength and wear resistance, frequently used in brackets, insulators, and housings. CNC Milling supports complex geometries in nylon parts.
Ceramics
CNC Milling processes advanced ceramics for high-performance applications needing hardness, wear resistance, and thermal stability.
Zirconia
With high fracture toughness and strength, zirconia is often used in dental, medical, and structural components. CNC Milling offers tight dimensional control for critical ceramic parts.
Alumina (Aluminum Oxide)
Known for its hardness and electrical insulating properties, alumina is ideal for electronic substrates and wear-resistant components.
Composites
CNC Milling is well-suited for composite materials, enabling high-precision machining of lightweight, high-strength parts.
Carbon Fiber Reinforced Polymers (CFRP)
Used in aerospace and automotive industries for their superior strength-to-weight ratio, CFRP components are milled with care to preserve their integrity.
Glass Fiber Reinforced Polymers (GFRP)
Offering durability and rigidity, GFRP is used in marine, construction, and industrial applications. CNC Milling ensures accurate geometry and surface quality.
CNC Milling Tolerances & Accuracy Standards
Precision is a key benefit of CNC milling. FastPreci provides top-tier tolerances for aerospace, medical, automotive, electronics, and other industries.
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.125 mm (±0.005″) | ±0.01 mm (±0.0004″) |
| Hole Diameter | ±0.1 mm | ±0.005 mm (with reaming or boring) |
| Flatness | 0.1 mm / 100 mm | 0.02 mm / 100 mm |
| Surface Finish | Ra 3.2 μm | Down to Ra 0.8 μm (with finishing) |
| Perpendicularity | ±0.1° | ±0.05° |
FastPreci typically applies ISO 2768-m (medium) or ISO 2768-f (fine) general tolerances for CNC milling processes, unless specific tolerances are required by the design. For critical features, we follow customer-specified tolerances or apply industry-standard precision tolerances as needed.
Industries Served by CNC Milling
CNC milling is a flexible, accurate process for producing complex geometries and fine details. It removes material in multiple axes, ideal for demanding industries like aerospace, electronics, mold making, and medical devices. CNC milling meets various industries’ needs for precision, complexity, and adaptability, including industrial automation,robotics, medical devices, and consumer electronics. FastPreci utilizes advanced equipment and multi-axis milling to produce parts that match specific industry requirements. Here are some of the key industries served by CNC Milling:
Industrial Automation
CNC milling is crucial for creating precise components for automated systems, ensuring accurate part production and consistent performance in industry.
Key Applications:
Sensor brackets, Actuator housings, Mounting plates, Custom jigs and fixtures
Benefits:
- High repeatability for production line stability
- Durable parts for continuous operation
- Support for both prototyping and volume manufacturing
Robotics
Robotics heavily uses CNC milling for lightweight, strong, high-precision components in joints, end-effectors, and housings.
Key Applications:
Robotics heavily uses CNC milling for lightweight, strong, high-precision components in joints, end-effectors, and housings.
Benefits:
- Multi-axis machining for complex kinematics
- Compatibility with aluminum, titanium, and engineering plastics
- Excellent balance of strength and weight
Medical Devices
In the realm of medical technology, Computer Numerical Control (CNC) milling plays a crucial role in the fabrication of dependable and exceedingly precise components, including surgical instruments and implantable devices. This manufacturing process adheres to stringent standards of cleanliness and dimensional accuracy.
Key Applications:
Orthopedic implants, Surgical instrument parts, Diagnostic device enclosures, MRI-compatible components
Benefits:
- Extreme tolerances (±0.001 mm)
- Medical-grade material support (PEEK, titanium, stainless steel)
- Burr-free surfaces and cleanroom-ready finishes
Consumer Electronics
CNC milling enables compact, sleek, and functional components for today’s consumer devices. It ensures tight fits, premium textures, and heat dissipation efficiency.
Key Applications:
Phone casings, Laptop chassis, Camera brackets, Cooling modules
Benefits:
- High surface finish quality (anodizing/polishing ready)
- Fine detail capability for logo/text engraving
- Fast turnaround for prototyping and design iteration
Precision Instruments
Precision instruments used in labs, testing, and optics depend on CNC milling for their micrometer-level accuracy and assembly consistency.
Key Applications:
Instrument frames, Optical mounts, Calibration components, Micro-mechanical parts
Benefits:
- Sub-micron accuracy for critical alignments
- Vibration-resistant structural components
- Excellent thermal stability with advanced materials
New Energy Equipment
CNC milling supports the fast-growing new energy sector with custom machined parts for battery systems, solar equipment, and hydrogen fuel applications.
Key Applications:
Battery modules, Cooling plates, Power enclosures, Energy converter brackets
Benefits:
- Adaptable to new materials and part geometries
- Efficient for small batch R&D or scaling to low-volume production
- High-quality surface finishes for energy-efficient designs
CNC Milling Surface Finishing Options
Surface finishing is crucial in CNC milling, improving part appearance, durability, and performance. FastPreci provides various CNC milling finishing options to meet functional and aesthetic needs across industries.
| Finishing Option | Process Description | Typical Applications / Benefits |
| Anodizing (Type II/III) | Electrochemical oxidation for aluminum. Type II for color, Type III for hardness. | Corrosion resistance, color customization, surface hardening (Type III). |
| Powder Coating | Dry powder applied electrostatically and cured to form a tough polymer layer. | Durable wear-resistant coating, aesthetic color and texture. |
| Bead Blasting | Abrasive blasting with glass or ceramic beads to create matte texture. | Smooth satin finish, tool mark removal, pre-treatment for coating. |
| Polishing | Mechanical or manual buffing to create a glossy or mirror-like surface. | Decorative finish, pre-plating preparation, consumer or luxury parts. |
| Electroplating / Nickel Plating | Metal layer deposited via electrochemical process (e.g., nickel, chrome). | Improved conductivity, corrosion/wear resistance, used in electronics/tools. |
| Passivation | Chemical removal of free iron from stainless steel surfaces. | Enhances corrosion resistance, especially for medical and food-grade parts. |
| Brushing | Abrasive brushing to create directional grain/satin texture. | Aesthetic enhancement, hides minor defects, popular in consumer products. |
| Black Oxide | Chemical conversion coating for steel, creating a dark oxide layer. | Mild corrosion protection, anti-glare, used in shafts, tooling, fasteners. |
CNC Milled Parts Gallery
Why Choose FastPreci for CNC Milling Services
FastPreci is your partner for precision CNC milling, offering advanced machining, quality control, and flexible support for high-standard parts.
Advanced CNC Milling Capabilities
We run 3/4/5-axis CNC mills for precise, complex parts. Prototypes to production, 3D features, multi-face milling, CAM-optimized.
Tight Tolerances for Demanding Parts
CNC milling at FastPreci is optimized for exceptional dimensional accuracy and repeatability, perfect for high-performance applications.Standard tolerances as low as ±0.005 mm.Compliance with ISO 2768 or customer-defined tolerances.Consistent batch-to-batch accuracy.
Extensive Material Machining Capabilities
We mill a wide range of materials, each programmed with optimal speeds, feeds, and tooling to achieve excellent results.Metals: Aluminum, Stainless Steel, Brass, Titanium.Plastics: ABS, POM, PEEK, Nylon, PTFE.Ceramics & Composites: Alumina, Zirconia, G10/FR4, Carbon Fiber.
Fast Turnaround & Scalable Production
From prototypes to mass production, our lean manufacturing ensures rapid, reliable delivery of CNC milled parts. Lead times 3–7 days with expedited options. Consistent delivery for high-mix, low-volume jobs.
Rigorous Quality Control Process
Every part we produce is subject to strict inspection and quality assurance at every stage.Raw material verification.In-process QC (CMM, calipers, micrometers).Final inspection and full documentation.Certifications and traceability available upon request
Flexible Customization & Engineering Support
We offer comprehensive CNC milling services, including engineering insight, tailored solutions for machinability and optimization, DFM support, surface finishing, secondary operations, assembly, packaging options, dedicated project management, and rapid technical responses.
CNC Milling Resources & Guides
