BIE delivers custom CNC milling and turning parts from prototype to production, backed by an ISO 9001 certified quality system. With 60+ CNC machines at our Dongguan, China facility, we hold tolerances down to ±0.01mm (±0.005mm for critical features) and provide DFM-reviewed quotes within 3-8 hours.
CNC machining uses computer-controlled milling and turning to produce precision parts from metal or plastic stock based on your CAD files and drawings — ideal for both prototyping and production runs.
Every BIE quote includes a DFM (Design for Manufacturability) review from our engineering team, helping you catch thin walls, tight tolerances, or cost-saving design changes before production begins.
BIE provides CNC machining services for custom metal and plastic parts, supported by an ISO 9001:2015 certified quality management system. Machining capabilities include CNC milling, CNC turning, and multi-axis machining, allowing parts with complex geometries and defined tolerances to be manufactured accurately. These services support both rapid prototyping and production manufacturing. Parts are produced based on approved CAD models and technical drawings, with optional surface finishing processes available to meet functional and appearance requirements.
BIE provides CNC machining services for custom parts, from rapid prototype to production orders. Our turning, milling, and multi-axis machining capabilities support both simple and complex components, with manufacturing processes controlled under an ISO 9001 certified quality system.
CNC milling capabilities include 3-axis, 4-axis, and multi-axis machining, supporting metal and plastic parts with complex geometries and controlled tolerances. Milling processes are suitable for components requiring multiple machined surfaces, intricate features, and stable dimensional relationships.
CNC turning capabilities support the machining of cylindrical components as well as parts produced from square or hexagonal bar stock. Using CNC lathes and turning centers, turned prototypes and production parts can be manufactured with controlled diameters, concentricity, and surface quality.
We offer a wide range of engineering-grade metals and plastics, including aluminum, steel, stainless steel, brass, copper, titanium, and commonly used plastics. If your desired material is not listed, please provide specifications, tolerances, and quantities so our engineering team can review your request.
A variety of surface finishes are available to enhance the durability, functionality, and appearance of CNC machined parts. Options include anodizing, powder coating, electroplating, polishing, sandblasting, brushing, and more, allowing parts to meet both technical and aesthetic requirements for your project.
| Surface Finish | Description |
|---|---|
| As Machined | Parts are delivered directly after CNC machining without additional surface treatment. |
| Anodizing | An electrochemical process that enhances corrosion resistance, surface hardness, and appearance. |
| Polishing | Smooths and shines surfaces to improve aesthetics and reduce friction or burrs. |
| Sand Blasting | Uses abrasive media to clean, smooth, or texture surfaces, improving finish or adhesion for coatings. |
| Brushing | Creates uniform linear textures on surfaces for improved appearance and tactile feel. |
| Powder Coating | A dry finishing process that provides durable, corrosion-resistant, and colored coatings. |
| Electroplating | Deposits a thin metal layer on the surface for improved corrosion resistance, wear resistance, or conductivity. |
| Black Oxidize | A chemical treatment that provides corrosion protection and a uniform black finish on steel parts. |
| Passivation | Enhances corrosion resistance of stainless steel by removing free iron from the surface. |
| Heat Treatment | Alters material properties to improve hardness, strength, or wear resistance. |
The tolerances listed below represent typical CNC machining capabilities. Final results are determined by part design, material behavior, feature complexity, and machining strategy.
| Parameter | Specification |
|---|---|
| General Tolerances | ISO 2768-mk |
| Precision Tolerances | ±0.005 mm (±0.0002 in) |
| Minimum Wall Thickness | 0.3mm |
| Minimum End Mill Size | Ø 0.2 mm |
| Minimum Drill Size | Ø 0.1 mm |
| Maximum Part Size | CNC Milling: 1200mm × 850mm × 600mm CNC Turning: 1000mm × 700mm |
| Minimum Feature Size | CNC Turning: Ø 0.5 mm CNC Milling: 0.3 mm |
| Surface Roughness (As Machined) | Ra 1.6–3.2 μm |
| Lead Time | 3-7 days |
We provide reliable CNC machining solutions for custom metal and plastic parts, supporting projects from rapid prototyping to stable production. With experienced engineers, well-equipped machining capabilities, and a structured quality control system, we focus on delivering consistent accuracy, manufacturability, and dependable lead times for international customers across various industries.
Our CNC machining facilities are equipped with advanced milling and turning centers, precision inspection instruments, and material verification tools. From complex geometries to tight-tolerance parts, every component is produced with consistent accuracy and verified to meet drawing requirements for material and dimensions.
Upload your 3D CAD files to receive a detailed quotation within 24 hours. Our experienced engineers review each design to identify potential manufacturing challenges, such as thin walls, deep cavities, or tight tolerances, and provide practical feedback to optimize manufacturability, cost, and lead time.
Quality is controlled at every stage of production. From incoming material inspection to in-process checks and final verification, we support First Article Inspection (FAI), CMM measurement, material certifications, surface finish inspection, and dimensional reporting to ensure every part meets specifications before shipment.
With stable production capacity and efficient scheduling, we support both rapid prototyping and production orders with reliable lead times. Parts are shipped worldwide, serving customers across North America, Europe, and other global markets with dependable logistics and on-time delivery.
From quotation to delivery, BIE manages each step with engineering review, controlled production, quality inspection, and global shipping support.
Upload your 2D drawings or 3D CAD files with material grade, quantity, tolerance, surface finish, and inspection or packaging requirements for an accurate quotation.
Our engineers review part geometry and manufacturability, identifying potential risks. A detailed quotation and estimated lead time are typically provided within 24 hours.
After order confirmation, parts are manufactured following an ISO 9001 certified quality system. In-process inspections and final dimensional checks are performed.
Finished parts are carefully packed to prevent damage and shipped worldwide using reliable logistics solutions, ensuring safe and on-time delivery.
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