Quick Answer: How Long Does Prototyping Take in China?
Standard rapid prototyping in China takes 7-10 business days from CAD upload to shipment. CNC machining is typically 7-10 days, 3D printing 3-7 days, vacuum casting 5-10 days, and injection molding 15-25 days for T1 samples. Expedited service delivers in as fast as 3-5 days for CNC and 3D printing.
But the real answer depends on six factors: process type, part complexity, material availability, surface finishing requirements, quantity, and your supplier’s workload. This guide breaks down each with real timelines from 1,890+ completed projects since 2012.
Why Prototyping Speed Matters
A German automotive supplier came to us in March 2024 with 12 days until the Frankfurt trade show. They needed 50 gearbox housing prototypes. Their local shop had quoted 4 weeks. We delivered all 50 CNC-machined 7075-T6 aluminum housings with hard anodizing in 8 days. They made the show.
This speed is not magic — it is a mature supply chain, in-house CNC capacity, and a factory network that absorbs surge demand. When you know how long each process actually takes, you can plan product development with confidence.
Timeline by Manufacturing Process
1. CNC Machining: 7-10 Days Standard
- Day 1: CAD review and DFM feedback (same day or next morning)
- Day 2-3: CAM programming, toolpath generation, fixture setup
- Day 3-6: Machining — milling, turning, or 5-axis depending on geometry
- Day 6-7: Surface finishing — anodizing, bead blasting, or as-machined
- Day 7-8: Quality inspection — CMM report, dimensional check, material cert
- Day 8-10: Packaging and express shipping pickup
Real case: A medical device startup ordered 10 surgical instrument handles in 6061 aluminum with M3 threaded inserts. Complexity: moderate (ergonomic curves, 5 machined features per part). Timeline: 7 days from CAD to DHL. Cost: $780.
Expedited: 3-5 days by running machines overnight and prioritizing your job. Typical surcharge: 30-50%.
2. 3D Printing: 3-7 Days
Fastest prototyping method for single parts and small batches:
- SLA (Stereolithography): 3-5 days. Visual prototypes and fit testing. Layer 0.05-0.1mm. Clear, tough, high-temp resin options.
- SLS (Selective Laser Sintering): 4-6 days. Functional plastic prototypes. Nylon PA12 standard. No supports needed.
- DMLS/SLM (Metal 3D Printing): 5-7 days. Metal functional prototypes. AlSi10Mg, 316L, Ti6Al4V. Post-processing +1-2 days.
- FDM: 2-4 days. Fastest, cheapest. PLA, ABS, PETG, PC. Best for early-stage form checks.
- MJF (Multi Jet Fusion): 3-5 days. Excellent surface and mechanical properties. Nylon PA12 and PA11.
Real case: Consumer electronics company ordered 5 drone controller housings for ergonomic testing. SLA Tough Resin — parts in DHL on day 5. Cost: $245.
3. Vacuum Casting (Urethane Casting): 5-10 Days
Ideal for 10-50 pieces with production-like material properties:
- Day 1-2: Master pattern — usually 3D printed SLA
- Day 2-3: Silicone mold — cures in 24 hours
- Day 3-8: Casting — 15-25 parts per day per mold
- Day 8-10: Trimming, finishing, QC, packaging
Materials: 20+ polyurethane formulations simulating ABS, PP, PC, PMMA, rubber (Shore A 30-90), and flame-retardant grades. Color matching available.
Real case: Robotics startup ordered 30 ABS-like enclosures with textured finish. SLA master in 2 days, silicone mold in 1 day, 30 castings in 4 days. Total: 8 days. Cost: $1,680.
4. Sheet Metal Fabrication: 5-10 Days
- Day 1: CAD review and flat pattern development
- Day 2-4: Laser cutting, punching, bending
- Day 4-6: Welding, hardware insertion (studs, standoffs, nuts)
- Day 6-8: Surface finishing — powder coating, anodizing, passivation
- Day 8-10: QC and shipping
Materials: Aluminum 5052/6061, stainless 304/316, cold-rolled steel, galvanized steel. 0.5mm-6mm thickness.
5. Injection Molding Prototype: 15-25 Days
- Day 1-3: Mold design review and DFM
- Day 3-12: Mold making — aluminum or P20 steel
- Day 12-15: T1 sample shot, dimensional check, adjustment
- Day 15-20: T2/T3 refinement if needed
- Day 20-25: Production samples, QC, packaging
Pro tip: Request an aluminum prototype mold (7-12 days, $800-2,000) instead of production steel. Good for 5,000-10,000 shots at 40-60% lower cost.
Factors That Affect Your Timeline
1. Part Complexity
A simple bracket with 3 features takes 3 days. A 5-axis aerospace manifold with 50+ features takes 12-15 days. Key factors: number of setups, tight tolerances (±0.01mm vs ±0.1mm), deep pockets, thin walls (<1mm), internal features requiring EDM.
2. Material Selection
- In stock (same day): 6061/7075 aluminum; 304/316 stainless; ABS, PC, Nylon, POM
- 2-3 days: 2024 aluminum, Ti Grade 5, PEEK, Ultem
- 5-7 days: Inconel, Hastelloy, special tool steel, fluoropolymers
3. Surface Finishing
- As-machined / As-printed: No extra time
- Bead blasting, brushing: +1 day
- Anodizing (clear/color): +2-3 days
- Hard anodizing: +3-4 days
- Powder coating: +2-3 days
- Electropolishing: +2-3 days
- Painting (color-matched): +3-5 days
4. Quantity
- 1-5 parts: Standard timeline — setup dominates
- 10-50 parts: Standard +20-40% — some parallel processing
- 50-200 parts: Standard +60-100% — production-style batching
5. Quality Requirements
- Standard QC: Dimensional spot-check + visual. No extra time.
- Full dimensional report: +1 day (CMM report, all critical dimensions)
- FAI (AS9102): +2-3 days (aerospace documentation package)
- ISO 13485 package: +2-3 days (medical device documentation)
How to Speed Up Your Prototyping
- Send a complete CAD package. Include 3D file (STEP/IGES), 2D drawing with tolerances, material spec, surface finish requirements, and quantity. Incomplete packages add 1-2 days of back-and-forth.
- Mark only critical dimensions. Do not tolerance every feature. Mark 5-10 critical dimensions and leave the rest at standard ±0.1mm. Over-tolerancing drives up both cost and timeline.
- Use in-stock materials. Check with your supplier which materials they stock. Switching from a specialty alloy to an equivalent stocked grade saves 3-5 days.
- Consider expedited service. For time-critical projects, ask about overnight machine runs. The 30-50% surcharge is often cheaper than a missed deadline.
- Split shipments for urgent needs. We can send finished parts daily instead of waiting for the entire batch. First parts arrive in 4-6 days instead of waiting for everything.
Shipping and Customs: The Hidden Timeline
- Express (DHL/FedEx/UPS): 3-5 business days to US/EU. Best for under 30kg.
- Air freight: 5-8 days. Better for over 30kg. Requires customs broker.
- Sea freight: 20-35 days. Production volumes only.
Customs tip: Prototypes typically clear in 1-2 days with proper docs: commercial invoice with HS code, “Prototype samples — no commercial value” declaration, and description matching the goods.
Frequently Asked Questions
Can I really get prototypes in 3 days?
Yes — for simple CNC or 3D printed parts with no finishing, expedited service, and in-stock material. About 15% of our projects ship within 5 days.
Why does China prototyping take longer than local?
Manufacturing time is similar or faster. The difference is 3-5 days shipping. Total door-to-door (10-15 days) often beats local shops quoting 3-4 weeks, thanks to dedicated prototyping cells.
How do I track progress?
Daily photo updates during production, dimensional report before shipping, real-time DHL tracking. Projects over $2,000 get a dedicated project manager on WhatsApp or email.
What if a part fails QC?
We remake it at no charge (happens in less than 2% of projects). Adds 2-4 days. We notify immediately with a new delivery date.
Do I need to pay for a mold?
CNC and 3D printing: no tooling needed. Vacuum casting: silicone mold, $100-500, reusable for 15-25 parts. Injection molding: aluminum prototype mold from $800-2,000, good for 5,000-10,000 shots.
What is NOT included in the timeline?
Customs delays (rare for properly documented prototypes), holidays (Chinese New Year adds ~10 days in Jan/Feb), and design changes after production starts.
Get Your Timeline Estimate
Upload your CAD file and receive a detailed quotation with a committed delivery date within 24 hours. 98% of our projects ship on or before the committed date. We will review your design for manufacturability and suggest timeline optimizations — free of charge.