Precision CNC Machining Services
High-quality CNC machining solutions for prototypes and production parts. 3-axis, 4-axis, and 5-axis milling, CNC turning, and Swiss machining with tolerances down to ±0.01mm. From single piece to mass production with competitive China manufacturing costs.
Free Consultation3-7 Days
Rapid Delivery
±0.01mm
Tolerance Accuracy
Ra 0.4μm
Surface Finish
1 - 100,000 pcs
Batch Flexibility
Materials
| Grade | Properties | Typical Applications |
|---|---|---|
| Aluminum 6061-T6 | Tensile Strength: 310 MPa, Density: 2.7 g/cm³, excellent machinability, good corrosion resistance, weldable | Aerospace components, automotive parts, electronic enclosures, fixtures, prototypes |
| Aluminum 7075-T6 | Tensile Strength: 572 MPa, Density: 2.81 g/cm³, high strength-to-weight ratio, excellent fatigue resistance | Aerospace structural parts, high-performance automotive components, military equipment, tooling |
| Stainless Steel 304 | Tensile Strength: 515 MPa, Density: 7.93 g/cm³, excellent corrosion resistance, good formability, non-magnetic | Food processing equipment, medical devices, chemical containers, architectural fittings |
| Stainless Steel 316/316L | Tensile Strength: 515 MPa, Density: 7.99 g/cm³, superior corrosion resistance especially to chlorides, marine grade | Marine components, medical implants, pharmaceutical equipment, offshore structures |
| Titanium Grade 5 (Ti-6Al-4V) | Tensile Strength: 950 MPa, Density: 4.43 g/cm³, excellent strength-to-weight ratio, biocompatible, corrosion resistant | Aerospace components, medical implants, automotive racing parts, marine hardware |
| Brass C360 | Tensile Strength: 340 MPa, Density: 8.5 g/cm³, excellent machinability, good corrosion resistance, electrical conductivity | Electrical connectors, plumbing fittings, decorative hardware, musical instruments |
| Engineering Plastics (POM/Delrin, Nylon, PEEK) | Lightweight, chemical resistant, electrical insulation, low friction, various temperature ratings | Insulators, bearings, gears, medical device components, food-grade applications |
Process Parameters
| Parameter | Standard Range |
|---|---|
| Dimensional Tolerance (Precision) | ±0.01mm to ±0.025mm (tight tolerance machining) |
| Dimensional Tolerance (Standard) | ±0.025mm to ±0.05mm (general applications) |
| Surface Roughness (As-machined) | Ra 0.4μm - 3.2μm (depending on process and material) |
| Minimum Wall Thickness | 0.5mm (metals) / 0.8mm (plastics) |
| Maximum Part Size (3-axis) | 1500mm x 800mm x 500mm |
| Maximum Part Size (5-axis) | 800mm x 600mm x 500mm |
| Minimum Feature Size | 0.3mm diameter holes, 0.5mm slots |
| Thread Capability | M1.6 and above, UNC/UNF, BSP, NPT, custom threads |
| Part Weight Range | 0.5g - 500kg |
| Geometric Tolerance | Flatness, parallelism, concentricity, perpendicularity to 0.01mm |
Surface Finishes
Anodizing (Type II / Type III)
Electrochemical process creating a durable oxide layer. Type II (standard): 5-25μm thickness, custom colors available. Type III (hard anodizing): 25-150μm, extreme hardness and wear resistance. Excellent for aluminum parts.
Sandblasting / Bead Blasting
Abrasive blasting creates uniform matte surface texture. Removes tool marks and surface imperfections. Options include glass bead, aluminum oxide, and walnut shell media. Achieves Ra 1.6μm - 3.2μm.
Electroplating (Chrome/Nickel/Zinc)
Metallic coating for enhanced appearance and corrosion resistance. Chrome plating for decorative finish, nickel for wear resistance, zinc for corrosion protection. Thickness: 5-25 microns.
Powder Coating
Electrostatic application of thermoset powder coating. Excellent durability, weather resistance, and custom RAL color matching. Thickness: 60-120 microns. Suitable for indoor and outdoor applications.
Brushed Finish
Directional surface texture for premium aesthetic appearance. Achieved through abrasive belt processing. Popular for consumer electronics, automotive trim, and architectural hardware.
Polishing (Mirror/Satin)
Mechanical polishing to achieve reflective or satin finish. Mirror polish: Ra ≤ 0.1μm. Satin polish: Ra 0.2μm - 0.8μm. Ideal for decorative parts, medical devices, and food-grade equipment.
Passivation
Chemical treatment for stainless steel to remove free iron and enhance corrosion resistance. Citric acid or nitric acid process. Creates protective chromium oxide layer without dimensional change.
Black Oxide
Conversion coating for ferrous metals providing mild corrosion resistance and attractive black finish. Minimal dimensional impact (< 0.5μm). Common for tooling, fasteners, and military components.
Design for Manufacturing (DFM)
- Design internal radii of at least 1/3 of the pocket depth to allow proper tool access and reduce stress concentrations
- Maintain minimum wall thickness of 0.5mm for metals and 0.8mm for plastics to prevent vibration and deflection during machining
- Avoid deep pockets with length-to-diameter ratios exceeding 4:1 to prevent tool deflection and maintain accuracy
- Design features accessible from standard tool orientations (top, side) to minimize setups and reduce cost
- Use standard drill sizes for holes to reduce tooling costs and lead time
- Avoid thin walls and tall, narrow features that are prone to vibration and chatter marks
- Consider workholding: provide flat surfaces or features for clamping to ensure stable machining
- Design undercuts sparingly; if required, keep them simple and accessible with standard tooling
- Specify thread depths not exceeding 1.5x the thread diameter for reliable tapping and thread quality
- Avoid unnecessarily tight tolerances on non-critical features to reduce machining time and cost
Tooling & Capacity
| Type | Lead Time | Suitable For |
|---|---|---|
| CNC Machining Capabilities | 3-axis, 4-axis, 5-axis milling | Complex geometries, multi-face machining, impellers, turbine blades, medical implants, aerospace parts |
| CNC Turning & Swiss Machining | Live tooling, sub-spindle | Shafts, bushings, pins, connectors, threaded components, high-precision cylindrical parts |
| Wire EDM & Sinker EDM | ±0.005mm precision | Hard materials, complex cavities, sharp internal corners, micro-features, injection mold components |
| Surface Grinding & Cylindrical Grinding | Ra 0.1μm achievable | Precision flat surfaces, tight tolerance diameters, bearing fits, optical mounts |
Quality Assurance
- CMM (Coordinate Measuring Machine) inspection for critical dimensions with 0.001mm resolution
- First Article Inspection (FAI) report provided for initial production parts with full dimensional data
- Surface roughness measurement using profilometer to verify finish specifications
- In-process inspection at critical machining stages to catch deviations early
- Calibrated measuring instruments: micrometers, calipers, height gauges, bore gauges, thread gauges
- Material certificates and traceability documentation for all raw materials
- Dimensional capability study (Cpk ≥ 1.33 for critical dimensions on production orders)
- Visual inspection for surface defects, burrs, and tool marks per customer specifications
- Final inspection report with CMM data, material certs, and surface finish measurements shipped with parts
- SPC (Statistical Process Control) monitoring for critical dimensions during production runs
Applications
- Aerospace: structural brackets, engine components, landing gear parts, avionics housings, satellite components
- Automotive: engine blocks, transmission housings, brake components, suspension parts, EV battery housings
- Medical: surgical instruments, implant components, diagnostic equipment housings, dental fixtures, prosthetics
- Electronics: heat sinks, enclosures, connectors, RF shielding components, semiconductor equipment parts
- Industrial: pump bodies, valve components, hydraulic manifolds, gear housings, automation fixtures
- Robotics: actuator housings, joint components, end-effectors, precision linkages, sensor mounts
- Defense: weapon components, communication equipment housings, optics mounts, vehicle armor components
- Energy: turbine components, solar panel mounts, wind turbine parts, oil & gas valve components
Why Choose FHY Precision
Unmatched precision: ±0.01mm tolerance capability for the most demanding applications
Material versatility: Machining capabilities for metals, plastics, composites, and exotic alloys
Complex geometry: 5-axis simultaneous machining for undercuts, compound angles, and organic shapes
Rapid turnaround: Prototypes in as fast as 3 days, production parts in 7-15 days
Scalable production: From 1 piece to 100,000+ pieces with consistent quality
Surface finish excellence: Mirror polish to Ra 0.4μm, multiple post-processing options available
China manufacturing advantage: Competitive pricing with strict quality control and fast delivery
One-stop service: CNC machining, surface finishing, assembly, and inspection under one roof
FAQ
1. What is the minimum order quantity (MOQ) for CNC machining?
Our CNC machining MOQ is just 1 piece. Whether you need a single prototype or 100,000 production parts, we provide the same attention to quality and precision. Low MOQ allows you to validate designs risk-free before committing to larger production volumes.
2. What is the typical lead time for CNC machined parts?
Standard lead time: 7-15 business days for production parts. Rapid prototyping: as fast as 3-5 business days for simple parts. Complex 5-axis parts: 10-20 business days. Lead time depends on part complexity, quantity, and surface finishing requirements. We provide confirmed delivery dates with every quote.
3. What tolerance can you achieve with CNC machining?
Our standard tolerance is ±0.025mm. For precision machining, we consistently achieve ±0.01mm. Geometric tolerances (flatness, parallelism, concentricity) can be held to 0.01mm. For the tightest requirements, we use in-process probing and post-machining CMM verification to ensure every critical dimension meets specification.
4. What materials can you machine?
We machine a wide range of materials: Aluminum alloys (6061, 7075, 2024, 5052), Stainless steel (303, 304, 316, 316L, 17-4 PH), Titanium (Grade 2, Grade 5), Brass and Copper alloys, Engineering plastics (POM, Nylon, PEEK, PTFE, Polycarbonate, ABS), Tool steel (D2, A2, S7), and Inconel/Hastelloy superalloys. Material certificates are provided with every order.
5. Do you provide free DFM (Design for Manufacturing) analysis?
Yes, we provide free DFM analysis within 24 hours of receiving your CAD files. Our engineers review your design for machinability, including tool access, thin walls, deep pockets, undercuts, tight tolerances, and cost optimization opportunities. This proactive review reduces revisions, lowers costs, and accelerates time to market.
6. What CAD file formats do you accept?
We accept: STEP (.stp/.step), IGES (.igs), STL, DXF, DWG, Parasolid (.x_t), SolidWorks (.sldprt), Inventor (.ipt), and PDF drawings. For CNC machining, STEP files are recommended for best accuracy. We also accept 2D drawings with dimensions if 3D models are unavailable.
7. What surface finishes are available for CNC machined parts?
We offer: Anodizing (Type II/III, multiple colors), Sandblasting/Bead blasting, Electroplating (chrome, nickel, zinc), Powder coating, Brushed finish, Polishing (mirror/satin), Passivation (stainless steel), Black oxide, Painting, Laser engraving, and Electropolishing. Most finishes are performed in-house or through certified finishing partners.
8. Can you machine parts from drawings or samples without 3D models?
Yes. If you only have 2D drawings (PDF, DXF, DWG) or physical samples, we can work from those. For samples, we offer reverse engineering services to create accurate 3D models. There may be a small fee for reverse engineering, which is credited toward your production order.
9. How is pricing calculated for CNC machined parts?
CNC part price = Material cost + Machine time (setup + machining) + Surface finishing + Quality inspection. Factors affecting price: part complexity, material type, tolerance requirements, quantity, and surface finish. We provide detailed quotations within 24 hours. Higher quantities significantly reduce per-piece cost due to setup amortization.
10. Do you provide international shipping?
Yes, we ship worldwide via DHL, FedEx, UPS, and ocean freight. Small orders typically ship by air express (3-7 days). Bulk orders ship by sea (3-5 weeks to US/Europe). All shipments include packing list, Certificate of Origin, and commercial invoice. Export packaging follows international standards with anti-rust protection.
11. How do you ensure consistent quality across production runs?
We implement rigorous quality control: SPC monitoring for critical dimensions, regular tool wear inspection, first article approval before mass production, and in-process sampling at defined intervals. Our CMM inspection verifies key dimensions with 0.001mm resolution. Statistical data is shared with clients upon request. We maintain full traceability from raw material to finished parts.
12. Can you handle both prototyping and production volumes?
Absolutely. We specialize in bridging the gap between prototype and production. Prototype phase: rapid turnaround, flexible quantities (1-100 pieces), design optimization feedback. Production phase: dedicated tooling and fixturing, process validation, consistent quality at scale. Many clients start with prototypes and seamlessly transition to production with us.
13. What is the difference between 3-axis and 5-axis CNC machining?
3-axis machining: tool moves in X, Y, Z linear axes. Suitable for flat features, pockets, holes, and simple 3D contours. Most cost-effective for standard geometries. 5-axis machining: tool moves in X, Y, Z plus two rotary axes, allowing machining from any angle in a single setup. Essential for complex geometries, undercuts, compound angles, impellers, and medical implants. Reduces setups, improves accuracy, and shortens lead time for complex parts.
14. Do you sign NDA (Non-Disclosure Agreement)?
Yes, we sign NDA before reviewing your design files. Your CAD files, product specifications, and business information are treated as confidential. We have served clients in defense, aerospace, medical, and consumer electronics sectors where IP protection is critical. NDA signing is our standard practice, not an exception.
15. Can you provide assembly services for machined components?
Yes, we offer light assembly services including press-fitting, fastener installation, bearing insertion, sub-assembly, and packaging. This one-stop service reduces your supply chain complexity and ensures dimensional compatibility between mating parts. Assembly instructions and quality checks are performed per your specifications.
16. What common machining challenges should I be aware of?
Our DFM review addresses these issues before production: Thin walls → Risk of vibration and deflection. FHY solution: Maintain minimum 0.5mm wall thickness for metals. Deep pockets → Tool deflection and poor surface finish. FHY solution: Limit depth-to-diameter ratio below 4:1. Sharp internal corners → Tool radius limitation. FHY solution: Design fillets matching tool radius. Tight tolerances on non-critical features → Unnecessary cost. FHY solution: Apply GD&T only where needed. Burrs on edges → Secondary deburring required. FHY solution: Specify edge break in drawing. Warpage in thin plates → Residual stress release. FHY solution: Stress-relief annealing before final machining.