You are here: Home » Support » FAQ

FAQ

  • What tolerances can you achieve for stainless steel parts?

    We can achieve standard tolerances of ±0.01 mm, with high-precision capabilities up to ±0.001 mm depending on part geometry and manufacturing process.

    Tighter tolerances are available upon request.

  • What is the difference between 304 and 316 stainless steel?

    The main difference is corrosion resistance.
    Stainless Steel 316 contains molybdenum, which provides better resistance to chemicals and saltwater environments compared to 304.

    316 is ideal for marine and medical applications, while 304 is more cost-effective for general use.

  • What is the best stainless steel for machining?

    Stainless Steel 303 is typically the easiest to machine due to its improved machinability.
    However, Stainless Steel 304 and 316 are more commonly used because they offer better corrosion resistance and overall performance.

    Our engineers can recommend the best material based on your specific requirements.

  • 12. How can I get a quote for my automotive parts?

    Simply upload your drawings or 3D files and provide basic requirements such as material, quantity, and surface finish. Our engineering team will review and provide a quotation within 12–24 hours.

    enlightened Tip: Providing clear tolerances and application details helps speed up the quoting process.

  • 11. What file formats do you accept for quotation?

    We accept STEP, STP, IGES, X_T, and STL files. 2D drawings (PDF/DWG) are also recommended for tolerance and technical requirements.


  • 10. How do you handle complex or tight-tolerance parts?

    We utilize advanced CNC equipment, optimized tooling strategies, and precision inspection methods to ensure complex geometries and tight tolerances are achieved consistently.


  • 9. Can you help optimize my design for manufacturing?

    Yes. We provide design for manufacturability (DFM) feedback to help reduce cost, improve machinability, and minimize production risks before manufacturing begins.


  • 8. What is your typical lead time?

    Lead time depends on part complexity and quantity. Prototypes can be delivered in as fast as 3–7 days, while production orders typically range from 1–3 weeks.


  • 7. What surface finishes are available for automotive parts?

    We offer a variety of finishes including anodizing, powder coating, polishing, sandblasting, plating, and passivation. Surface treatments improve corrosion resistance, durability, and visual appearance.


  • 6. Do you provide inspection reports and quality documentation?

    Yes. We can provide full dimensional inspection reports, CMM reports, and material certifications upon request. Documentation ensures transparency and traceability for every order.


  • 5. How do you ensure consistent quality in batch production?

    We implement standardized machining processes, first article inspection (FAI), in-process quality monitoring, and final inspection. This ensures stable quality and repeatability across all production batches.


  • 4. What manufacturing processes do you offer for automotive parts?

    We offer CNC machining (3-axis, 4-axis, and 5-axis), CNC turning, sheet metal fabrication, and limited 3D printing for prototyping. Processes are selected based on part complexity, tolerance, and production volume.


  • 3. Can you support both prototyping and production?

    Yes. We support everything from rapid prototyping (as fast as 3–7 days) to low- and mid-volume production. Our processes are optimized to ensure consistency when scaling from prototype to batch manufacturing.


  • 2. What materials are commonly used for automotive components?

    We support a wide range of automotive-grade materials, including aluminum alloys (6061, 7075), stainless steel (303, 304, 316), alloy steels, brass, and engineering plastics such as PEEK and nylon. Material selection depends on strength, weight, corrosion resistance, and application requirements.


  • 1. What tolerance can you achieve for automotive parts?

    We typically achieve tolerances up to ±0.01 mm depending on part geometry, material, and manufacturing process. For critical components, tighter tolerances can be evaluated based on drawings and technical requirements.


  • 12. CNC machining vs 3D printing for medical parts – which is better?

    Both CNC machining and 3D printing are widely used in medical manufacturing, and the best choice depends on your project requirements.

    • CNC Machining:
      • High precision (up to ±0.01 mm)
      • Excellent surface finish
      • Suitable for functional and end-use parts
    • 3D Printing:
      • Faster for prototyping
      • Ideal for complex geometries and internal structures
      • Lower cost for early-stage design validation

    In general:

    • Choose CNC machining for precision, strength, and final parts
    • Choose 3D printing for speed, complexity, and prototyping

    Not sure which process is right? Upload your design and we’ll recommend the best manufacturing solution.

  • 11. What is the best material for medical device components?

    The best material depends on your specific application requirements, including strength, biocompatibility, weight, and sterilization conditions.

    • Stainless Steel (316L): Ideal for surgical instruments and components requiring high strength and corrosion resistance
    • Titanium (Grade 5): Best for implants due to excellent biocompatibility and strength-to-weight ratio
    • PEEK: Suitable for lightweight, non-metallic medical components with good chemical resistance
    • PTFE: Used for low-friction and chemically resistant applications

    Choosing the right material requires balancing performance, environment, and manufacturing feasibility.

  • 10. How do I get started with my project?

    Simply upload your CAD file or send us your project requirements. Our team will review your design and provide a quotation along with manufacturing recommendations.


  • 9. What industries within medical do you support?

    We support a wide range of medical-related applications, including surgical instruments, medical device components, implants, and precision equipment parts.


  • 8. Can you help optimize my design for manufacturing?

    Yes, our engineering team provides design for manufacturability (DFM) feedback to help optimize your design, reduce risks, and improve production efficiency.


If there are any CNC machining issues.
Please contact us.
Capabilities
Service
Support
COPYRIGHT © 2025 CHANGZHOU NAITE METAL TECHNOLOGY CO., LTD. ALL RIGHTS RESERVED.