CNC Machined Parts

When your project demands the pinnacle of accuracy, durability, and complex geometry, look no further than professional CNC machining services. Our expertise spans the entire spectrum of precision manufacturing, delivering components that meet the most stringent specifications. Whether you require intricate CNC Milling Service Parts with complex contours and pockets, or robust rotational components from our CNC Lathe Service Parts division, we have the technology and skill to execute. For projects requiring a fully bespoke approach from material selection to final finishing, our CNC Custom Fabrication Parts service offers complete flexibility. At the core of everything we produce are CNC Precision Machined Parts, where tolerances are held to microscopic levels, ensuring flawless fit, function, and performance in your assembly.


The quality and reliability of a CNC Machined Part are directly defined by its technical parameters and the capabilities of the manufacturing process. We utilize advanced multi-axis CNC machining centers and Swiss-type lathes, coupled with a rigorous quality management system, to produce parts that excel in every metric. Below are the detailed specifications and material options that define our manufacturing scope.

Standard Machining Capabilities & Tolerances

  • Machining Processes: 3-axis, 4-axis, & 5-axis milling; CNC turning; Swiss machining; CNC drilling & tapping.
  • Standard Tolerances: +/- 0.005 inches (+/- 0.127 mm).
  • Precision Tolerances: Down to +/- 0.0005 inches (+/- 0.0127 mm) for critical features.
  • Surface Finish: Standard finish at 125 µin. Can achieve finishes as fine as 8 µin (0.2 µm Ra) with secondary operations.
  • Maximum Part Size (Milling): 48" x 24" x 24" (1219 mm x 610 mm x 610 mm).
  • Maximum Part Size (Turning): Diameter: 12" (305 mm), Length: 24" (610 mm).

Available Materials & Properties

Material Category Common Alloys/Grades Key Properties Typical Applications
Metals Aluminum (6061, 7075), Stainless Steel (304, 316), Steel (1018, 4140), Brass, Copper, Titanium High strength-to-weight ratio, corrosion resistance, thermal/electrical conductivity, durability. Aerospace frames, medical instruments, automotive components, hydraulic fittings, electrical connectors.
Plastics & Composites ABS, Nylon (PA6, PA66), PEEK, Delrin (Acetal), PTFE (Teflon®), Polycarbonate Lightweight, electrical insulation, chemical resistance, low friction, good impact strength. Insulators, bearing surfaces, seals & gaskets, prototypes, consumer electronics housings.

Secondary Services & Finishes

  • Deburring & Edge Breaking: Manual and automated processes for safe, clean edges.
  • Surface Finishing: Bead blasting, polishing, anodizing (Type II & III), powder coating, passivation, plating.
  • Heat Treatment: Annealing, stress relieving, hardening & tempering to alter material properties.
  • Quality Inspection: First-article inspection (FAI), in-process checks, and final validation using CMM, optical comparators, and surface profilometers.

Hot Products

  • Brass CNC Machining

    Brass CNC Machining

    Brass is one of the easiest metals to machine, with many years of experience and proven expertise, our brass machining capabilities enable us to deliver high precision parts and components that match your design specifications. We utilize advanced Youlin® Brass CNC Machining technology to ensure perfect precision and repeatability, whether you need a handful of prototypes or full production runs with quantities in the tens of thousands. No matter how simple or complex your design may be, we will give you the flawless brass parts your project requires.
  • CNC Machining Large Diameter Aluminum V-belt Pulley

    CNC Machining Large Diameter Aluminum V-belt Pulley

    Ningbo Youlin Trading Co., Ltd. is a large-scale CNC machining large diameter aluminum V-belt pulley manufacturer and supplier in China. We have been specialized in All-In-One Solutions for Precision CNC Machining, CNC turning, CNC Milling, Metal Stamping, Deep Drawing, Forging, Casting, Investment Casting, Die Casting, Aluminum Extrusion, Plastic Injection, Tube Laser Cutting and Sheet Metal fabrication in a variety of industries for many years. Our products have a good price advantage and cover most of the European and American markets. We look forward to becoming your long-term partner in China.
  • CNC Machining Multi Groove Motor Timing Belt Pulley

    CNC Machining Multi Groove Motor Timing Belt Pulley

    As the professional CNC machining multi groove motor timing belt pulley manufacture, we would like to provide you CNC machining multi groove motor timing belt pulley. And we will offer you the best after-sale service and timely delivery. We hope to establish friendly cooperative relationship with your company with high quality products, reasonable price, considerate service and create a better future hand in hand.
  • V Crankshaft Belt Pulley Gym Chain Pulley

    V Crankshaft Belt Pulley Gym Chain Pulley

    Ningbo Youlin Trading Co., Ltd. is a large-scale V crankshaft belt pulley gym chain pulley manufacturer and supplier in China. We have been specialized in Customized CNC Machining Services of any complexity for the production of V crankshaft belt pulley gym chain pulley for many years. Our products have a good price advantage and cover most of the European and American markets. We look forward to becoming your long-term partner in China.
  • Iron Investment Die Casting Pump Body Shell

    Iron Investment Die Casting Pump Body Shell

    Customized Youlin® iron investment die casting pump body shell Suppliers. As lightweight metals are widely used, iron investment die casting pump body shell are becoming a choice of many industries. We focus on the manufacturing of non-standard precision aluminum parts with complex structures, and are committed to delivering highly accurate and consistent components to our clients. Our advanced equipment and skilled employees to ensure that our team maintains a strong competitive advantage. We have also been improving the Aluminum CNC Machining process to improve efficiency and quality, and continue to meet customer production needs.
  • Stainless Steel CNC Machined Parts

    Stainless Steel CNC Machined Parts

    Our nbyoulin Custom Stainless Steel CNC Machined Parts are engineered for OEM/ODM buyers who require superior corrosion resistance, high mechanical strength, and tight dimensional accuracy in demanding operating environments.Using advanced 3-axis, 4-axis, and 5-axis machining centers, high-speed CNC lathes, and multi-tasking CNC turning equipment, we produce complex housings, valve manifolds, precision shafts, and custom fittings to your exact technical specifications.

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