Precision CNC Machining & Custom Manufacturing from China — From Prototype to Production

Y&H China partners with a well‑integrated OEM machining factory equipped with over 100 CNC machines, including 5‑axis machining centers, gantry machining centers, CNC lathes, wire EDM, laser cutting, gear‑cutting and grinding machines. We deliver custom‑machined parts across various metals and engineering plastics, supporting industries ranging from automation and new energy to aerospace, semiconductors and medical devices.

All components undergo rigorous in‑process monitoring and final‑stage quality audits, backed by five ZEISS coordinate measuring machines and a full suite of metrology equipment. From single prototypes and small‑batch trials to large‑volume mass production, we supply complete, traceable manufacturing solutions, covering casting & forging blanks, surface finishing, custom export‑ready packaging and after‑sales technical support.

• 100+ CNC Machines In-House
• ±0.005 mm Highest Dimensional Tolerance
• 5 ZEISS CMM Inspection Machines
• 24 h Quote Turnaround on Drawings

Parts We Manufacture

We specialize in high-precision, complex components that demand tight tolerances and excellent surface finish. Below are our core product families — click any category to see more case photos.

① Blades & Impellers

Precision 5-axis machined blades and impellers for turbines, pumps, compressors and aerospace applications. Complex curved surfaces, tight profile tolerances and dynamic balancing available.

② Permanent Magnet Motor Components

Custom machined housings, shafts, rotors and assemblies for permanent magnet motors, including precision bore machining, keyway cutting and surface treatment for motor manufacturers.

③Mechanical Seals

High-precision mechanical seal components including seal rings, sleeves and cartridges. Materials cover stainless steel, carbide and engineering plastics with Ra 0.2 surface finish on sealing faces.

④Deep Hole Machining

Deep hole drilling and boring for shafts, cylinders and mold components with controlled straightness, concentricity and internal surface quality.

⑤Thin-Wall Parts

Precision machining of thin-walled and easily deformed components, using specialized fixturing and low-cutting-force processes to maintain dimensional accuracy.

⑥Casting & Forging

In-house coordination of casting and forging blanks — cast iron, cast steel, cast stainless steel, die-cast aluminum and die forging — followed by full CNC finish machining.

⑦ Dynamic Balancing

Dynamic balancing service for rotating parts such as impellers, rotors, shafts and assemblies, ensuring smooth operation at high rotational speeds.

Manufacturing Equipment

Over 100 machines in our own facility, covering milling, turning, grinding, EDM, laser cutting, gear cutting, welding and balancing. This allows us to keep full control over lead time, quality and cost.

Plus a full range of high-precision measuring instruments — coordinate measuring machines (CMM), vision measuring systems, surface roughness testers, hardness testers and spectrometers.

Precision Standards & Available Materials

• Dimensional tolerance: ±0.005 mm – ±0.02 mm
• Surface roughness: Ra 0.2 – Ra 1.6
• Strict geometric tolerance control for high-standard industrial assembly
• Specialized in blades & impellers, mechanical seals, deep-hole parts and thin-wall parts

Materials We Work With

Metals: Stainless Steel · Carbon Steel · Aluminum Alloy · Brass · Copper · Alloy Steel · High-Temperature Alloy

Engineering Plastics: POM · PA (Nylon) · ABS · PC

In-House High-Precision Inspection

Quality is built into every stage of production. We operate a dedicated inspection room equipped with five ZEISS CONTURA coordinate measuring machines, alongside vision measuring systems, surface roughness testers, hardness testers and spectrometers. Every batch undergoes in-process inspection and final quality verification, and we provide full inspection reports upon request.

• ZEISS CMM — 3D dimensional and geometric tolerance measurement
• Vision Measuring System — high-accuracy 2D optical inspection
• Surface Roughness Tester — Ra / Rz verification
• Hardness Tester — Rockwell / Brinell / Vickers
• Spectrometer — material composition verification

100% final inspection on critical dimensions. Inspection reports (FAI / PPAP-style) available on request.

See Our Machines in Action

Take a closer look at our production floor, 5-axis machining, turning, grinding and inspection processes.

Full-Spectrum OEM Services

From the moment you send a drawing to after-delivery support, we handle every step in-house or through our trusted supply chain.

1. Drawing Conversion & Engineering Review — We convert, review and optimize your drawings for manufacturability before production.
2. Prototype & Sample Development — Rapid prototyping and hand samples for design verification and testing.
3. OEM Custom Machining — Production strictly per your drawings or physical samples.
4. Casting & Forging Blanks — In-house coordination of cast iron, cast steel, cast stainless steel, die-cast aluminum and die forging, followed by finish machining.
5. Surface Treatment — Black oxide, anodizing, electroplating, sandblasting, painting and more.
6. Low-Volume Trial & High-Volume Mass Production — Flexible production from single prototypes to large batch orders.
7. Strict Quality Inspection & Reports — In-process and final inspection with full measurement reports available.
8. Custom Export Packaging — Tailored packaging for international shipping, including neutral or branded options.
9. Technical Consultation & After-Sales Support — Engineering support before, during and after production.
10. Complete Equipment Design & Assembly — We also take on design, manufacturing and assembly of complete equipment sets.

How We Work — From Inquiry to Delivery

1. Inquiry Received — You send drawings, physical samples or a requirement description.
2. Technical Evaluation & Quote — Our engineering team reviews the part and provides a formal quote within 24 working hours.
3. Order & Specification Confirmation — We confirm all technical details, materials, tolerances, surface treatment and delivery schedule.
4. Prototype / Sample Production — We manufacture the prototype or first-article sample.
5. Customer Sample Testing & Approval — You test and confirm the sample; any adjustments are incorporated before mass production.
6. Mass Production — Formal batch production begins with documented process control.
7. In-Process & Final Inspection — Our QC team performs in-process checks and 100% final inspection on critical dimensions.
8. Packing & Shipping — Custom export packaging, followed by shipment via your preferred carrier or our logistics partner.
9. After-Sales Follow-Up — We follow up on delivery, quality feedback and any ongoing technical support needs.

Industries We Serve

Our OEM machined components are trusted across a wide range of industries that demand precision, reliability and traceability.

• General Industrial Equipment
• Automation Equipment
• New Energy
• Aerospace Power & Gas Turbines
• Semiconductor
• Transportation
• Medical Devices
• Communication Equipment
• Instruments & Meters
• Agricultural Machinery
• Hardware & Fittings

Ready to Start Your OEM Machining Project?

Send us your drawings, samples or part specifications today. Our engineering team will review your requirements and reply with a competitive quote within 24 working hours. No drawing? No problem — send us a sample or a description, and we will help you finalize the specifications.

Accepted file formats: PDF, DWG, DXF, STEP, IGES, SolidWorks, or physical samples.