Custom CNC Machining Services for On-Demand Manufacturing
From prototype to production, FastPreci delivers one-stop CNC machining services with expert DFM analysis and process optimization to achieve cost-effective, precision parts in days.
- Fast delivery – as soon as 3 days
- CMM dimensional inspection
- Expert DFM & process optimization
Trusted by 1000+ Companies
Why FastPreci — Solving Real CNC Manufacturing Challenges
Tired of slow lead times and limited technical support? FastPreci CNC machining bridges the gap with expert engineering guidance, precision custom components, and fast delivery — from prototype to production.
Located in Shenzhen, China, FastPreci is a CNC machining factory offering in-house milling, turning, grinding, and EDM & Wire EDM services. Our advanced 3-, 4-, and 5-axis machines help to produce custom parts meeting ISO & IATF standards with tolerances as tight as ±0.005 mm.
Fast, precise, and professional — the FastPreci standard.
- Fast: Rapid prototyping and fast delivery — as soon as 3 days
- Precise: Tight tolerances verified by advanced CMM inspection
- Professional: DFM services and design optimization for your innovation
CNC Machining with Engineering & DFM Support
With FastPreci, DFM isn’t just a report — it’s engineering support that identifies risks, optimizes manufacturability across structure, materials, and process, and ensures your CNC parts are correct from the first prototype.
Example: DFM Optimization Case — Automotive Engine Cylinder Block
| Aspect | Before DFM | After DFM by FastPreci | Improvement |
| Material | 6061-T6 aluminum alloy – prone to deformation during deep cavity machining | Material stabilized through stress relief and aging heat treatment before machining | Reduced deformation |
| Wall Thickness | 2.0 mm, uneven wall thickness leading to rigidity issue | Optimized wall structure and machining sequence for better clamping and support | Improved stability |
| Machining Process | Multiple milling operations + manual finishing | Optimized 5-axis CNC strategy and toolpath | 30% cycle time reduction |
| Tolerance | Flatness ±0.05 mm, hole diameter ±0.03 mm | Flatness ±0.01 mm, hole diameter ±0.01 mm | 5× precision increase |
| Surface Finish | Ra 1.6 μm with hard anodizing | Ra 0.4 μm with Nikasil coating | Better wear and heat resistance with improved sealing and smoother finish |
| Cost Efficiency | Frequent rework, high material waste | Streamlined process reduced cost by 22% | Lower production cost |
Through early DFM analysis, FastPreci refined the cylinder block’s structure, machining approach, and surface treatment — achieving higher precision, smoother finishes, and more durable surfaces.
A DFM report empowers engineers to make data-driven decisions before production. It visualizes machining challenges and cost drivers — helping refine your design and accelerate project validation from prototype to production.
See how your parts are analyzed and optimized
Our CNC Machining Capabilities
Get factory-direct CNC machining services with rapid prototyping, tight tolerances, and responsive engineering support. Partner with FastPreci — where precision meets speed.
CNC Milling Service
FastPreci delivers custom CNC milling for metals and plastics, meeting exact performance and dimensional needs across aerospace, medical, robotics, automotive, and electronics industries.
- Advanced multi-axis machining
- Excellent Surface Finish
- Wide selection of materials
CNC Turning Service
FastPreci’s CNC turning online ensure high precision and repeatability across complex geometries and production volumes using horizontal, vertical, and mill-turn centers.
- Ideal for Symmetrical Parts
- Efficient cycle times
- Cost-Effective for Batches
CNC Grinding Service
FastPreci provides precision CNC grinding for ultra-high accuracy and fine surface finishes in critical components.
- Tolerances down to ±0.002 mm
- Superior Repeatability for Batches
- Mirror Fnishes as fine as Ra 0.2 μm
EDM & Wire EDM Services
Our EDM and Wire EDM (WEDM) services precisely machine parts with intricate features, tight tolerances, and hard-to-machine materials.
- No mechanical stress on workpieces
- Capable of machining hard materials
- Ideal for complex shapes and fine details
Full Support from Prototype to Production
At FastPreci, we support your CNC machining project through every stage — from early concept validation to final mass production.
Prototyping
Quickly turn your designs into functional prototypes for form, fit, and basic performance testing.
- DFM analysis and design optimization
- Prototype turnaround within days
Engineering Validation Test (EVT)
Verify engineering performance and material properties under real conditions.
- Full dimensional inspection
- Material and structure optimization
Design Validation Test (DVT)
Validate appearance, assembly, and manufacturability with production-intent parts.
- Assembly fit optimization
- Surface finishing optimization
Production Validation Test (PVT)
Ensure consistent quality and efficiency before full-scale production.
- Pilot runs for process verification
- Detailed inspection documentation
Mass Production (MP)
Move seamlessly into stable, repeatable production with full traceability.
- ISO certified quality management
- Scalable, cost-efficient production
Materials Used in CNC Machining
FastPreci offers a broad selection of engineering-grade metals, plastics, ceramics, and composites for CNC machining. Each material is chosen for its precision, strength, and performance in demanding applications — and our engineers can recommend the best option based on your design and production needs.
Metal CNC Machining
Metals are the foundation of CNC machining, ideal for structural strength, heat resistance, and dimensional stability. FastPreci machines both common and high-performance alloys with micron-level precision.
Aluminum
Aluminum Alloy is widely used in CNC machining for its light weight, high strength and corrosion resistance. It’s ideal for precision machining and complex geometries, widely used in aerospace, automotive, electronics, and medical industries.
Stainless Steel
Stainless Steel Alloy offers excellent corrosion resistance, strength, and heat tolerance, making it ideal for CNC machining of medical devices, food equipment, automotive parts, and structural components.
Brass
Brass Alloy offers excellent corrosion resistance and conductivity, making it ideal for CNC machined parts like fittings, connectors, and decorative components. It’s easy to machine, antibacterial, and has a smooth golden finish.
Titanium
Titanium Alloy offers exceptional strength-to-weight ratio, corrosion and heat resistance, and biocompatibility. It’s ideal for CNC machining of lightweight, high-performance parts in aerospace, medical, and automotive applications.
Plastic CNC Machining
Plastic materials offer versatility, electrical insulation, and chemical resistance — ideal for lightweight, functional prototypes or end-use components.
POM
POM (Polyoxymethylene), also known as acetal or Delrin, is a strong, low-friction plastic ideal for CNC machining precision parts like gears, bearings, and valves. It offers excellent wear resistance, stiffness, and dimensional stability.
PTFE
PTFE (Teflon) is a high-performance plastic known for its chemical resistance, low friction, and high-temperature stability, making it ideal for CNC machined seals, gaskets, and lab components.
PEEK
PEEK (Polyether Ether Ketone) is an engineering plastic with exceptional strength, chemical resistance, and heat tolerance up to 260°C, ideal for CNC machined aerospace, medical, and automotive parts.
Ceramic CNC Machining
Technical ceramics deliver exceptional hardness, wear resistance, and thermal stability — ideal for demanding applications requiring electrical insulation or precision in harsh environments.
Zirconia
Zirconia (ZrO₂) offers high toughness, hardness, and wear resistance, ideal for CNC machining precision parts. Its chemical stability and thermal insulation suit medical, aerospace, and automotive uses like dental implants, seals, and cutting tools.
Alumina (Aluminum Oxide)
Aluminum oxide (Al₂O₃) offers high hardness, strength, and wear resistance, ideal for CNC machined electronic, mechanical, and medical parts. Its insulation and heat resistance to 1500°C ensure stable performance in electronics and aerospace.
Composite CNC Machining
Composite materials combine the best of strength, weight reduction, and vibration damping — perfect for aerospace, robotics, and performance equipment.
Carbon Fiber
Carbon fiber (CFRP) is a lightweight, high-strength composite ideal for CNC machining in aerospace, automotive, and electronics. It offers excellent rigidity, corrosion and heat resistance for precision and lightweight applications.
Glass Fiber
Glass fiber (GFRP) is a lightweight, strong composite with excellent corrosion resistance and insulation. Ideal for CNC machined housings, insulators, and structural parts, it offers high impact and thermal resistance when reinforced with epoxy or phenolic resins.
CNC Machining Surface Finishing Options
FastPreci offers surface finishing to enhance appearance, durability, and performance of CNC machined parts — meeting functional and aesthetic needs across industries.
| Surface Finish Option | Process Description | Typical Applications / Benefits |
| Polishing | A mechanical process using abrasive compounds to achieve a high-gloss finish. | Used in applications requiring aesthetic appeal, such as medical devices and consumer products. |
| Sandblasting / Bead Blasting | A blasting process that propels fine media to produce a uniform matte or textured surface. | Ideal for uniform, non-reflective textures that improve coating adhesion or visual appeal. Used for automotive parts, aerospace components, and decorative metal work. |
| Anodizing | An electrochemical process that increases the thickness of the natural oxide layer on the surface of aluminum. | Common in aerospace, automotive, and electronics for corrosion resistance, durability, and aesthetic appeal. |
| Electroplating | A process that uses an electric current to deposit a layer of metal (e.g., nickel, chrome) onto the part surface. | Often used for corrosion resistance, wear resistance, or appearance. Common in automotive and electronic industries. |
| Coating (Powder Coating, PVD) | Application of a thin, protective coating to enhance durability and aesthetic properties. | Used to protect parts from corrosion and wear while providing a durable finish. Common in automotive, electronics, and aerospace. |
| Heat Treatment | A process of heating and cooling metals to alter their physical properties. Can improve surface hardness. | Used for parts requiring increased hardness, strength, and wear resistance, such as gears, shafts, and cutting tools. |
| Passivation | Chemical removal of free iron from stainless steel surfaces. | Enhances corrosion resistance, especially for medical and food-grade parts. |
CNC Machining Tolerances
CNC Milling Tolerances
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.125 mm | ±0.01 mm |
| Hole Diameter | ±0.1 mm | ±0.005 mm (with reaming or boring) |
| Flatness | 0.1 mm / 100 mm | 0.02 mm / 100 mm |
| Roughness | Ra 3.2 μm | Ra 0.8 μm |
| Perpendicularity | ±0.1° | ±0.05° |
CNC Turning Tolerances
| Feature | Standard Tolerance | Tightest Achievable Tolerance |
| Linear Dimensions | ±0.01 mm to ±0.05 mm | ±0.005 mm |
| Coaxiality / Concentricity | ±0.02 mm | ±0.005 mm |
| Diameter (Turning Operations) | ±0.01 mm | ±0.005 mm |
| Straightness | ±0.01 mm to ±0.05 mm | ±0.002 mm |
| Roundness | ±0.01 mm | ±0.002 mm |
| Parallelism | ±0.01 mm | ±0.002 mm |
| Roughness | Ra 3.2 μm | Ra 0.8 μm |
CNC Grinding Tolerances
| Feature | Standard Tolerance | Tightest Achievable Tolerance |
| Outer Diameter (OD) | ±0.01 mm | ±0.002 mm |
| Inner Diameter (ID) | ±0.01 mm | ±0.002 mm |
| Flatness | 0.01 mm | 0.002 mm |
| Parallelism | 0.01 mm | 0.003 mm |
| Cylindricity | 0.01 mm | 0.002 mm |
| Roundness | 0.01 mm | 0.002 mm |
| Roughness | Ra 3.2 μm | Ra 0.8 μm |
Mirror Surface EDM Tolerances
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.01 mm | ±0.005 mm |
| Hole Diameter | ±0.015 mm | ±0.005 mm |
| Slot Width | ±0.02 mm | ±0.005 mm |
| Edge Radius / Corner | R0.2 mm | R0.1 mm |
| Roughness | Ra 3.2 μm | Ra 1.6 μm |
| Standards Applied | ISO 2768-m / ISO 2768-f | ISO 286, DIN ISO 1302 etc. |
High-Precision Wire EDM Tolerances
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.005 mm | ±0.002 mm |
| Hole/Opening Diameter | ±0.004 mm | ±0.0025 mm |
| Slot Width | ±0.008 mm | ±0.003 mm |
| Min. Corner Radius | R0.125 mm | R0.1 mm |
| Roughness | Ra 3.2 μm | Ra 1.6 μm |
| Standards Applied | ISO 2768-f, GB/T 1804-2000 | ISO 1302 for surface finish |
Medium-Speed Wire EDM Tolerances
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.02 mm | ±0.01 mm |
| Hole/Opening Diameter | ±0.02 mm | ±0.01 mm |
| Slot Width | ±0.02 mm | ±0.01 mm |
| Min. Corner Radius | R0.125 mm | R0.1 mm |
| Roughness | Ra 3.2 μm | Ra 1.6 μm |
| Standards Applied | Cost-effective fine cutting | Tooling, jigs, semi-precision |
High-Speed Wire EDM Tolerances
| Feature | Standard Tolerance | Tightest Achievable |
| Linear Dimensions | ±0.03mm | ±0.02 mm |
| Hole/Opening Diameter | ±0.03mm | ±0.02 mm |
| Slot Width | ±0.03mm | ±0.02 mm |
| Min. Corner Radius | R0.125 mm | R0.1 mm |
| Roughness | Ra 6 μm | Ra 3.2 μm |
| Standards Applied | Fast prototyping, low-cost | General cutting, mold blanks |
Comprehensive Metrology & Inspection for Every Part
Every CNC machined part at FastPreci is verified through a complete metrology and inspection process — from dimensional measurement to surface and material validation — ensuring accuracy, consistency, and full compliance with your drawings.
| Category | Capabilities & Equipment |
| Dimensional Accuracy | Coordinate Measuring Machines (CMM), 2D measuring instruments, height gauges, micrometers, calipers |
| Geometric & Surface Validation | Thread gauges, pin gauges, block gauges, surface roughness testers |
| Material & Composition Analysis | XRF (X-ray Fluorescence Spectrometer) for alloy and coating verification |
| Documentation & Traceability | CMM inspection reports, material certificates (CoC / MTR), and complete dimensional data for every part |
- Verified precision with CMM
- Transparent inspection reports
- ISO 9001 / 13485 / 14001 / IATF 16949 quality systems
Industries Served by CNC Machining
FastPreci provides precision CNC machining for demanding sectors such as aerospace, medical device, robotics, automotive, and electronics. With advanced multi-axis milling and turning, we produce custom parts with tight tolerances and complex geometries. Here are the key industries we serve:
Industrial Automation
CNC machining powers industrial automation with custom parts for robotics, conveyors, actuators, and motion systems, ensuring reliable, efficient, and seamless integration.
Key Applications:
Sensor brackets, Actuator housings, Mounting plates, Shafts, Couplings, Bushings, Bearing seats
Benefits:
- Stable tolerances for repeatable assembly and uptime
- Durable parts built for continuous operation
- Scalable runs from prototype to production
Robotics
CNC machining delivers lightweight, high-strength, and precise robotic parts such as joints, housings, and end effectors, supporting smooth motion, durability, and reliability in robotic systems.
Key Applications:
Joint components, Servo motor shafts and housings, End effectors, Precision gears, Base plates
Benefits:
- Multi-axis precision for complex motion
- Lightweight, high-strength components for dynamic motion
- Fast prototyping to accelerate iteration cycles
Medical Devices
CNC machining produces high-precision, contamination-free parts for medical tools, implants, and diagnostic devices. Using stainless steel, titanium, and medical grade plastics, it meets the strict standards of the medical industry.
Key Applications:
Orthopedic implants, Surgical instrument parts, Diagnostic device enclosures, Bone screws, Drill guides
Benefits:
- Micron-level tolerances for reliable fit and function
- Biocompatible materials and clean-finish surfaces for safety
- Traceable production and documentation for regulatory needs
Consumer Electronics
CNC machining enables precise, sleek components for consumer electronics — from housings and buttons to wearable parts. It ensures tight fits, smooth finishes, and efficient heat dissipation for both rapid prototyping and mass production.
Key Applications:
Phone casings, Laptop chassis, Camera brackets, Cooling modules, Aluminum bezels, VR headset components, fitness tracker housings
Benefits:
- Compact, high-precision parts for tight packaging
- Fine surface finishes and consistent textures for premium feel
- Rapid turnarounds to support fast product cycles
Precision Instruments
CNC machining ensures micrometer-level precision and consistency in laboratory, optical, and testing instruments, delivering stable, repeatable performance for measurement and calibration components.
Key Applications:
Optical mounts, Calibration parts, Mechanical components, Spindles, Instrument knobs, Miniature precision components (Ø0.2–0.5 mm)
Benefits:
- Sub-micron accuracy for critical alignments and metrology
- Vibration-resistant design with thermal stability
- Tight runout and roundness control for rotating parts
New Energy Equipment
CNC machining powers the new energy sector with precision parts for batteries, solar, and hydrogen systems, delivering durable, corrosion-resistant components like housings, valves, and impellers for reliable performance.
Key Applications:
Battery modules, cooling plates, Power enclosures, Energy converter brackets, Connectors, Terminals, Valve bodies
Benefits:
- Complex, corrosion-resistant parts for harsh environments
- Leak-tight threads and precision sealing surfaces
- Efficient for R&D and small batches
Customer Success Stories
Industry: Aerospace
Material: Stainless Steel 304
Quantity: 1 pc
The thruster component required extremely tight structural accuracy across multiple intersecting bores. The customer specified a 0.002 mm flatness requirement and strict spacing tolerances, making traditional one-piece machining infeasible.
FastPreci machined the features as separate precision elements and then assembled them to ensure stability and cost efficiency. Critical dimensions were controlled to ISO 2768-m, with CMM verification confirming 0.002 mm flatness and key spacing features within ±0.050 mm tolerance band at client’s request.
“The components ordered from FastPreci were exactly as expected, and the customer service is top notch… They even produced the part before I ordered to prove they could meet the tolerances. Can’t recommend enough!”
— Fabrizio Pisani, United Kingdom
Why Choose FastPreci
Fast
Lead time as fast as 3 days, accelerating your R&D and production progress, easily meet tight deadlines.
Precision
Tolerances as tight as 0.005mm, rich experience with advanced 5-axis CNC machines, mill-turn machines, and precision grinding machines, meets a variety of tolerance requirements.
Cost-effective
According to your functionality and quantity requirements, develop the optimal manufacturing process, combined with efficient self-owned factories to achieve optimal performance and cost.
One-stop Solution
From CNC machining to aluminum extrusion and heat treatment to surface finishing, from prototyping to mass production, easily and efficiently customize various parts.
Strict Quality Control
ISO 9001 quality management system certification, equipped with various quality inspection instruments including Zeiss coordinate, process and results can be controlled.
Dedicated Service
A dedicated account manager is available to provide fast response, individualized service, full support, and easy management of complex projects.