CNC machining, 3D printing, sheet metal, injection molding, and vacuum casting — all from one Dongguan facility. Tolerances to ±0.005 mm. DFM review with every quote. Parts back in days.
One facility. Eight processes. CNC machined prototypes, injection molded parts, sheet metal assemblies, and additively manufactured components — handled in-house from first file to final shipment.
Every part is produced in our own Dongguan facility. Your engineer handles the file. Our engineer makes the part. No third-party shop involved on standard orders.
Upload your file and receive instant pricing for standard geometries. Complex parts get an engineering review within 24 hours — including DFM notes on wall thickness, radii, undercuts, and tolerance feasibility.
Every shipment includes a dimensional inspection report, material certifications traceable to heat number, and a Certificate of Conformance. First Article Inspection available for production programmes.
TOP PROTO engineers understand dimensional requirements and quality documentation in aerospace, medical, automotive, robotics, electronics, energy, communications, semiconductor, and consumer products.
Tolerance Achievable on CNC
Quote Turnaround with DFM Review
Single Part Accepted — No Minimum Order
Manufacturing Processes, All In-House
Submit STEP, DXF, STL, or DWG files with your specifications. The quoting engine analyses geometry and returns instant pricing for standard parts. Complex parts go to engineering review.
TOP PROTO engineers confirm tolerances, material compatibility, and any design issues before quoting. You receive pricing, lead time, and specific DFM notes — within 24 hours for standard orders.
On approval, files move to scheduling, material allocation, and CNC programming. In-process dimensional checks run at defined intervals. You can track progress throughout.
Every feature is measured against your drawing before shipment approval. Parts arrive with a dimensional inspection report, material certifications, and Certificate of Conformance.
Top Proto’s direct manufacturing model eliminates broker markups and subcontractor delays. Parts are quoted, produced, inspected, and shipped by the same team in the same Shenzhen facility — which is why our lead times start from 24 hours for standard CNC parts and our pricing is competitive with the largest online machining platforms without sacrificing documented quality.
