CNC Custom Fabrication Parts

For any manufacturing or engineering project demanding the utmost in dimensional accuracy and material integrity, custom CNC fabricated components are the cornerstone of success. Our extensive CNC fabrication services deliver precisely that, offering a comprehensive solution from rapid prototyping to full-scale production runs. We specialize in creating complex, high-tolerance CNC Machined Parts that meet the rigorous specifications of industries such as aerospace, medical devices, and automotive. Whether your design requires the multi-axis capabilities of our CNC Milling Service Parts for intricate contours and pockets, or the rotational symmetry achieved through our CNC Lathe Service Parts for shafts, cylinders, and discs, we have the technology and expertise. Every component undergoes stringent quality control, ensuring the final deliverable is truly CNC Precision Machined Parts, ready for immediate integration into your assemblies.


The foundation of a superior CNC custom fabrication parts lies in robust technical specifications and transparent process capabilities. Our manufacturing ecosystem is built to handle a diverse range of materials and geometric challenges while maintaining consistent, repeatable quality. Below is a detailed overview of our core machining parameters and material offerings.

Primary Machining Capabilities & Tolerances

Machining Process Standard Tolerance High-Precision Tolerance Maximum Part Size (L x W x H)
3-Axis Milling ±0.005" (0.127 mm) ±0.001" (0.025 mm) 40" x 20" x 20" (1016 x 508 x 508 mm)
5-Axis Milling ±0.003" (0.076 mm) ±0.0005" (0.0127 mm) 30" x 20" x 20" (762 x 508 x 508 mm)
CNC Turning ±0.001" (0.025 mm) ±0.0002" (0.005 mm) Ø12" x 40" (Ø305 x 1016 mm)
Swiss-Type Turning ±0.0005" (0.0127 mm) ±0.0001" (0.0025 mm) Ø2" x 20" (Ø51 x 508 mm)

Available Material Groups

  • Metals:
    • Aluminum Alloys (6061, 7075, 2024)
    • Stainless Steels (304, 316, 17-4 PH)
    • Tool Steels (D2, A2, O1)
    • Carbon Steels
    • Brass, Copper, Titanium
  • Plastics & Composites:
    • ABS, Nylon (PA6, PA66), PEEK
    • Acetal (Delrin), Polycarbonate
    • PTFE (Teflon), UHMW-PE
    • Carbon Fiber Reinforced Polymers

Key Process Parameters

Parameter Specification / Range Notes
Surface Finish (Ra) 8 µin to 125 µin (0.2 µm to 3.2 µm) Controlled through machining parameters and secondary operations.
Thread Machining Unified (UNC/UNF), Metric (M), NPT, BSP Capable of internal and external threads, including fine-pitch.
Geometric Dimensioning (GD&T) Flatness, Circularity, Cylindricity, True Position Full compliance with ASME Y14.5 standards.
Lead Time (Prototype) 5 - 10 Business Days Subject to part complexity and material availability.
Production Volume 1 to 10,000+ units Optimized processes for both low-volume and high-volume runs.

Hot Products

  • CNC Milling Services

    CNC Milling Services

    We offer Youlin® CNC Milling Services for any types of custom parts, whatever plastics or metals, simple or complex. With our precision 3-, 4- and 5-axis CNC milling centers, combined with other advanced capabilities and our experienced team, we can offer high-quality CNC parts as well as fast delivery. We guarantee your projects will be handled smoothly by our in-house CNC department and supplier network, which means your team can focus on bringing your product to market.
  • Hot Forging

    Hot Forging

    Youlin® Hot forging is known to produce some of the strongest manufactured parts and components compared to other metal manufacturing processes. We produce hot forging parts and components from a few grams to more than a few hundred kilograms. For hot forging parts with special surface finish requirements, we provide a broad range of secondary operation including machining, surface finishing, etc.
  • Cold Forging

    Cold Forging

    Youlin is a Youlin® cold forging company, is your one-stop source for specialty fasteners, cold headed and machined parts, and engineered components, utilizing multi-station cold heading, multi-spindle screw machining and CNC and secondary machining. By blending cold forming technology including heading, threading and systematic tool forming designs with secondary machining, Youlin has a unique capability to engineer and manufacture long term, cost effective cold headed solutions for our customers.
  • Sheet Metal Laser Cutting Service

    Sheet Metal Laser Cutting Service

    We are experts in the field of Youlin® Sheet Metal Laser Cutting Service. Sheet metal laser cutting is one of metal profiling processes. It directs a high-powered laser through optics to cut materials for industrial applications. Laser cutting is both more precise and less energy-consuming than plasma cutting, but has an upper threshold on the thickness of the material being cut. Youlin offers both fiber and CO2 lasers that can cut many materials including mild steel, stainless steel, aluminum, copper, brass, and exotic alloys. CO2 (carbon dioxide) laser excels at cutting, engraving, and boring metals, while fiber laser is a good option for thicker materials.
  • CNC Aluminum V Flat Belt Pulley Auto Engine

    CNC Aluminum V Flat Belt Pulley Auto Engine

    Ningbo Youlin Trading Co., Ltd. is a professional CNC aluminum V flat belt pulley auto engine manufacturer and supplier in China. All our industries served are agricultural machinery, automotive industry, construction machinery, lifting industry, oilfield industry, etc. Besides forging, we could also supply other value added services for finished products. We have produced CNC aluminum V flat belt pulley auto engine for many years, looking forward to reaching a long-term cooperative relationship with you.
  • Automobile and Motorcycle Connectors Parts

    Automobile and Motorcycle Connectors Parts

    Ningbo Youlin Trading Co., Ltd. is a professional automobile and motorcycle connectors parts manufacturer and supplier in China. Our main projects including 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. It’s in a variety of industries for more than decade’s year. Looking forward to reaching a long-term cooperative relationship with you.

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