At JIZAO, every file is reviewed by a real machining engineer, not an instant quoting system. After receiving your drawings or 3D files, we will respond within 12 hours. Once sufficient information is provided — such as material, quantity, tolerances, surface finish, and delivery address — we can typically provide a complete feasibility review, manufacturing proposal, and quotation within 24 hours.

Before production, we check the key manufacturing risks in your design and communicate any concerns clearly. After order confirmation, we continue to update you on project progress throughout production. All parts are inspected against the drawing before shipment, and we do not send parts that do not meet dimensional requirements to our customers.

Many manufacturing platforms mainly forward orders to partner factories, which can make quality control, communication, and delivery consistency harder to manage. At JIZAO, we take a more engineering-driven approach. Every drawing is reviewed by experienced front-line engineers, not by AI alone or by a simple order-routing process. This allows us to assess manufacturability more thoroughly and provide practical suggestions to reduce production risk, lower unnecessary cost, improve part strength, and support more reliable manufacturing outcomes.

We apply the same level of attention to both prototyping and low-volume production. From design verification and trial production to inspection and packaging, each step is handled with clear communication and engineering oversight. After order confirmation, we continue to update customers on project progress so there are fewer unknowns during production.

With professional project support, dedicated customer communication, and global logistics coordination, JIZAO delivers a reliable and technically grounded manufacturing experience for customers in industries such as medical, automotive, aerospace, electronics, and robotics.

Lead time depends on part complexity, quantity, and manufacturing process. For prototypes, parts can usually be shipped within 2–5 days. Low-volume production typically requires 15–25 days. For a more accurate delivery schedule, please send us your 3D/2D drawings, material, and quantity. Our engineering team will review the project and provide an estimated lead time during the quotation process.

JIZAO offers a wide range of surface finishing options for both metal and plastic parts, including anodizing, powder coating, painting, electroplating, brushing, sandblasting, and polishing. For custom colors, we can use pre-colored resins or apply post-processing based on RAL or Pantone color standards.

We also support color consistency verification and gloss control to help maintain a consistent visual appearance across different production batches.

Yes. If required, JIZAO can provide factory material certificates, RoHS/REACH compliance reports, and third-party inspection documents. For critical applications, dimensional inspection data, CMM reports, and First Article Inspection (FAI) documents can also be included with shipment.

Yes. Many of the materials we commonly use, including aluminum alloys, stainless steel, and engineering plastics, comply with RoHS and REACH requirements. If needed, JIZAO can provide supplier certificates or third-party test reports to support compliance. Please let us know your target standard when submitting your inquiry or RFQ, such as RoHS 3 or REACH SVHC.

At JIZAO, parts are inspected against the drawing before shipment, and we do not knowingly send nonconforming parts to customers. Our engineering and quality teams review production and inspection results carefully to reduce the risk of dimensional or quality issues before delivery.

If there is still a problem after you receive the parts, please contact us with the relevant details, such as photos, inspection data, and the drawing requirement involved. We will review the case promptly with our engineering and quality teams and work with you on a practical solution.