Top Proto manufactures precision custom parts in our facility in Shenzhen, China. Upload your CAD file, receive instant DFM feedback and pricing, and receive dimensional inspection reports with every shipment. We machine, mold, fabricate, and print custom parts in 50+ materials to tolerances starting at 0.005mm — from single prototypes through to sustained production runs.
Our facility operates 300+ CNC machining centers, injection molding presses, sheet metal fabrication equipment, and 3D printing systems under a single ISO 9001:2015, ISO 13485, IATF 16949:2016, and AS9100D certified quality management system. Every order is produced in-house. No subcontracting. No middlemen. Your parts are quoted, machined, inspected, and shipped by the same team.
Direct access to a verified Shenzhen manufacturer with 300+ machines, four active quality certifications, and a workflow built to move from uploaded CAD file to inspected finished parts without unnecessary steps.
Top Proto is the manufacturer. Every part is produced in our own facility by our own engineers and machinists. You communicate directly with the production team — no brokers, no third-party shops, no specification loss between your drawing and the machine that runs your part. Direct manufacturing means faster response, clearer accountability, and lower cost.
Upload your STEP or DXF file and receive instant pricing, lead time, and design for manufacturability analysis for standard geometries. Our DFM engine identifies tolerance achievability, tool access issues, and cost-reduction opportunities before production begins. Complex parts receive a confirmed engineering review within 24 business hours.
Quality at Top Proto is verified, not assumed. Every order ships with a dimensional inspection report confirming critical feature measurements, material certifications traceable to the heat or lot number, and a Certificate of Conformance. CMM inspection available for complex geometry and tight positional tolerance requirements.
Top Proto produces parts for aerospace, automotive, medical device, robotics, electronics, semiconductor, consumer product, new energy, and communication programs. Our engineering team understands the dimensional requirements, material standards, and quality documentation expectations specific to each sector before your order enters production.
Machines Running at Peak Efficiency
Ultra-Fine Tolerances Achievable
Lead Times Starting From
Engineering Materials Available
From CAD file to inspected parts in hand — our process is built for speed and transparency with zero ambiguity at each stage.
Submit your STEP, DXF, STL, or DWG file through our quoting system along with your drawing, material specification, quantity, and required lead time. Our DFM engine analyzes your geometry and returns instant pricing for standard configurations — no waiting for a sales rep to relay your file to an engineer.
Our engineers review your files for manufacturability, confirm tolerance achievability, and return a complete quote with pricing, production lead time, and specific DFM recommendations within 24 business hours for complex parts. You receive direct feedback from the engineer handling your program, not a template response.
After order confirmation, your files move directly to production scheduling, material allocation, and CNC programming. In-process inspection at defined intervals tracks dimensional compliance through every production stage. You receive progress updates at key milestones and can request production status at any time.
Parts are measured against your drawing using calibrated inspection equipment before shipment is approved. Your shipment includes a dimensional inspection report confirming all critical measurements, material certifications, and a Certificate of Conformance. Tracking is provided at dispatch for express and standard international shipping.
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.
