Engineered for Excellence

Nanjing Precision Engineering Co Ltd, based in Nanjing, China, is a trusted manufacturer specializing in OEM and ODM customized mechanical products. With over 20 years of industry experience, we offer a full range of precision services including CNC machining parts, sheet metal fabrication parts, CNC tube bending parts, and plastic injection molding parts. Certified under ISO 9001, our commitment to quality, innovation, and customer satisfaction has made us a reliable partner for clients worldwide.

20+

20+

Years of experience

Cooperating Enterprises

Our Precision Engineering Solutions

CNC Machining Service

We offer high-accuracy CNC milling, drilling, turning, etc. for both metals and plastics backed by modern equipment and experienced technicans.

Sheet Metal Fabrication Service

From cutting& forming to welding & finishing, our service turn raw materials into precision and durable customized mechanical parts.

CNC Tube Bending Service

We provide complex and high-precision tube bending services, like end forming, clamping, pipe bending, etc., supporting various materials and geometries to meet your requirements.

At Nanjing Precision Engineering Co Ltd, we deliver high-precision engineering solutions tailored to your specific needs. Combining advanced technology, skilled craftsmanship, and strict quality control, we ensure every custom product meets exacting standards across industries. Our core services cover CNC Machining Parts, Sheet Metal Fabrication Parts, CNC Tube Bending Parts — providing end-to-end support from prototype to production.

Trusted By

The Way We Make Perfection

At Nanjing Precision Engineering Co Ltd, quality is at the core of everything we do. Our ISO 9001-certified quality management system ensures that every component we produce meets the highest standards of precision, durability, and consistency. From raw material inspection to in-process monitoring and final product testing, we implement strict quality control procedures at every stage of production. Our dedicated QC team utilizes advanced measuring equipment such as CMMs, calipers, gauges, and surface testers to verify dimensional accuracy and performance — ensuring your parts are delivered right the first time, every time.

"Their attention to detail, fast lead times, and consistent quality have helped us streamline our production process. Truly reliable and professional!"

"The automobile exhaust pipe work Nanjing Precision Engineering Co. Ltd. did for us exceeded expectations. They supported our design adjustments with great flexibility and delivered flawless results—all within our tight timeline."

Mark Franceschi

★★★★★

★★★★★

Real Reviews from Real Customers

★★★★★

"As an oil & gas equipment supplier, we require components that can withstand both physical and environmental stress. Their team understood our technical drawings perfectly while also offered suggestions to optimize for manufacturability without compromising performance. The parts passed our internal stress and pressure tests with flying colors."

Ryan Scott

★★★★★

"We ordered a small batch of stainless steel connectors for a new energy project. The precision of the internal threads and the smooth surface finish exceeded our expectations. Each piece was individually bubble-wrapped, and the entire shipment arrived without a single scratch. You can tell they care about both the product and the packaging."

★★★★★

"This was our first time outsourcing sheet metal fabrication overseas, and we were skeptical. But these guys delivered 200+ laser-cut and bent steel panels, each fitting perfectly into our assembly line jigs. No rework was needed. Their team kept us updated with production photos and CMM reports before shipping. Extremely professional."

Scott Freeman

★★★★★

"We needed a batch of custom CNC aluminum brackets for a robotics application with ±0.01mm tolerance requirements. Not only did they deliver ahead of schedule, but every single part was dimensionally flawless. The machining marks were minimal, and the surface anodizing was clean and consistent. Truly impressed with both quality control and communication throughout the process."

Luiz Gonzaga

James Robichaud

Peter Blumenstein

★★★★★

★★★★★

Frequently Asked Questions

What industries do you serve with your OEM/ODM precision engineering services?

We serve a wide range of industries including automotive, AI technologies, hydraulics, medical devices, new energy, and oil & gas. Our solutions are customized to meet stringent application-specific requirements.

What certifications do you have to ensure quality and compliance?

We are ISO 9001 Certified, and adhere to rigorous internal quality standards including full inspection reports, FAI, and material traceability. We can also accommodate customer-specific quality documentation such as PPAP, ROHS, REACH, and CE marking.

Can you support prototyping as well as mass production?

Absolutely. We offer full prototyping services for early-stage development and transition seamlessly to low- and high-volume production with scalability built into our workflows.

What engineering capabilities do you offer?

Our core capabilities include CNC machining services, 5-axis milling, CNC turning, EDM, sheet metal fabrication services, tube bending services, welding, casting, and precision assembly. We work with a variety of materials including stainless steel, aluminum, brass, titanium, and engineered plastics.

What tolerances can you maintain in your machining processes?

We can achieve tight tolerances up to ±0.005 mm (±5 microns), depending on part geometry, material, and machining method. All tolerance requirements are reviewed during DFM analysis.

Can you manage assembly and sub-assembly of mechanical parts?

Absolutely. We offer precision mechanical assembly, including welding, joining, thread inserts, and packaging of sub-assemblies—ready to be integrated into your final system.

How do you ensure consistent quality throughout production?

We have a dedicated Quality Control (QC) Department performing incoming, in-process, and final inspections using CMMs, calipers, micrometers, and vision systems. SPC and 100% inspection can be applied as required.

What materials do you work with?

We machine a broad range of metals and plastics, including stainless steel (304, 316, 17-4), aluminum (6061, 7075), brass, copper, titanium, Inconel, and engineering plastics like PEEK, Delrin, Nylon, and PTFE.

How do I get a quote for my custom parts?

Simply send us your 2D/3D drawings (STEP, IGES, STL, or PDF) and project specifications. We typically return quotes within 24–48 hours, including lead time, cost, and technical feedback if needed.

Do you provide Design for Manufacturability (DFM) support?

Yes. Our engineering team offers DFM consultations to optimize part design for cost-efficiency, quality, and manufacturability. We work collaboratively to reduce lead time and material waste.

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