Custom CNC Machining Services in China
— 1 Part to 50,000

ISO 9001:2015 · ±0.01mm · DFM + quote in 2–24 hours

Diode Machining is a custom CNC machining services supplier in China. We machine aluminum, stainless steel, titanium and engineering plastics — from a single prototype to 50,000-piece production runs. 3-, 4- and 5-axis milling, CNC turning and Swiss machining, inspected on CMM to ±0.01mm

⏱️ Special Promotion: Submit your CAD drawing now to claim Free Prototype + Expedited Lead Time (Offer valid through the end of this month Oct 2026).

Common Sourcing CNC Parts From China — The 4 Things That Usually Go Wrong

If any of these sound familiar, the problem is usually the supplier model — not your design.

"I spent three weeks going back and forth on drawings."

Slow, vague DFM feedback burns your engineering hours — and usually hides a manufacturability problem until it’sexpensive. You get DFM feedback and a full quote within 2–24 hours, from a manufacturing engineer, not a
salesperson.

"The sample was perfect. Production wasn't."

First-article quality rarely survives a scale-up, because the production order gets moved to a different machine or subcontracted out. Your production runs on the same machines and fixtures as the approved sample — and a CMM report ships with every batch.

"They promised two weeks. It took six."

Promised dates slip when the order leaves the building. Your parts run in our own factory in Guangzhou: prototypes in 3–5 days, production in 7–15, and a 24–48 hour rush service when a line is down.

"The quote came back 30% higher than I expected."

Every item arrived after you’d committed — tooling, brokerage, handling, re-inspection. We quote one landedDDP figure up front: tooling, production and freight in a single number, with the breakdown shown.

Every one of these is fixable. Send us one drawing and judge us on the first response.

About Diode Machining

Diode Machining is a custom CNC machining manufacturer based in Guangzhou, China — and we run our own

factory. We are not a trading company. That means you deal directly with the people who machine your parts, and

you pay factory pricing instead of the 20–30% markup a trader adds on top.

We have been machining precision parts for overseas customers since 2009. Today our 1,000m² shop floor runs 50+ machines — 3-, 4- and 5-axis CNC mills, CNC turning centres and EDM — supported by an in-house QC lab with CMM and surface-finish inspection. We hold ISO 9001:2015 certification and issue a CMM inspection report with every shipment.

Our customers are OEMs and product teams in packaging machinery , medical devices, and robotics & automation. They stay with us for one reason: parts that fit, on a date they can plan around. Standard production tolerance is ±0.01 mm, prototypes ship in 3–5 days, and there is no minimum order quantity — one part or 50,000.We also take the friction out of sourcing from China. DFM feedback and pricing come back within 2–24 hours.

Shipping is DDP door-to-door to the US and EU, so customs and brokerage are already handled. Your drawings stay confidential under NDA from the first conversation.

Send us a drawing — we’ll tell you what we’d change before you commit to tooling

Why Choose Diodemachining

Transparent Pricing

We offer real factory pricing without the added 20-30% markups commonly seen with trading companies. By working directly with us, you receive quotes that reflect actual costs based on raw materials, machine time, and labor, ensuring you get the best value.

Customized Solutions

We provide tailored mechanical design and manufacturing solutions based on your industry characteristics and specific needs, ensuring a perfect fit for your project goals.

Logistics and Customs Clearance Benefits

Worried about the complexities of international shipping? You can put your mind at ease. Whether you need quick prototypes sent via UPS ,DHL in just 3 days, or large quantities delivered directly to your facility, our logistics team can offer Special door to door logistics including import tax, you don’t have to worry about the clearance at all, thus enabling you to concentrate on your primary business operations.

Quality Control Supervision with CMM Equipment

Our Quality Control team rigorously supervises every step of the production process, utilizing advanced Coordinate Measuring Machine (CMM) technology for precise measurements and inspections. This combination of meticulous oversight and state-of-the-art CMM equipment ensures that each product meets our stringent quality standards, providing you with the assurance of receiving reliable and high-quality solutions for your projects.