We offer custom CNC milling services for metal and plastic parts, supporting projects that require precise surfaces, slots, pockets, and multi-face features. Our service covers both prototype and production needs, with flexible machining options to meet different design and tolerance requirements.
CNC milling works by using computer-controlled rotating cutting tools to gradually remove material from a fixed workpiece. Based on programmed toolpaths generated from CAD and CAM data, the cutting tool moves along multiple axes to machine precise surfaces, slots, pockets, and complex contours.
During the process, spindle speed, feed rate, and cutting depth are accurately controlled to ensure dimensional accuracy and repeatability. This allows CNC milling to produce complex geometries with tight tolerances and consistent quality, making it suitable for both prototype development and production parts across a wide range of industries.
BIE’s milling operations focus on controlled execution and process stability. Each job follows verified programs, defined setups, and monitored cutting parameters to ensure dimensional consistency. After machining, parts undergo surface finishing and assembly as required, followed by a final inspection before shipment.
Advanced CNC milling equipment and standardized processes enable the accurate machining of metal and plastic parts with complex features and tight tolerances. The service supports both prototype development and ongoing production with consistent quality.
3-axis CNC milling is suitable for machining parts with simple to moderately complex geometries. The cutting tool moves along the X, Y, and Z axes to create flat surfaces, pockets, slots, and basic contours. This process is cost-effective and widely used for prototypes, brackets, plates, and general structural components with standard tolerance requirements.
4-axis CNC milling adds a rotary axis to the standard 3-axis setup, allowing the workpiece to rotate during machining. This enables multiple sides of a part to be machined in a single setup, improving accuracy and reducing repositioning errors. It is ideal for parts with features around the circumference, angled holes, and complex side details.
5-axis CNC milling allows simultaneous movement of the cutting tool and workpiece along multiple axes, enabling the machining of highly complex geometries in one setup. This process delivers superior accuracy, smoother surface finishes, and tighter tolerances, making it suitable for precision components with intricate features, deep cavities, and multi-angle surfaces.
We offer a wide selection of engineering-grade metals and plastics suitable for CNC milling, including aluminum, steel, stainless steel, brass, copper, titanium, and commonly used engineering plastics. These materials support the production of milled components with flat surfaces, complex contours, pockets, slots, and multi-face features. If your required material is not listed, please provide specifications, tolerances, and quantities for engineering review.
A range of surface finishes is available for CNC milled parts to improve durability, functional performance, and surface appearance. These finishing options help enhance corrosion resistance, wear resistance, surface smoothness, and visual quality, making milled components suitable for both functional and aesthetic requirements across various applications.
| Description | Description |
|---|---|
| As Machined | Parts are delivered directly after CNC milling, retaining visible tool marks. Suitable for functional components where appearance is not critical. |
| Anodizing | An electrochemical process applied mainly to aluminum milled parts to improve corrosion resistance, surface hardness, and color consistency. |
| Polishing | Smooths milled surfaces to achieve a refined finish, reducing surface roughness and improving appearance and friction performance. |
| Sand Blasting | Uses abrasive media to create a uniform matte texture on milled surfaces, improving surface consistency or preparing parts for secondary coatings. |
| Brushing | Produces controlled linear textures on milled surfaces, commonly used for visible components requiring a consistent directional finish. |
| Powder Coating | Applies a durable protective coating to milled parts, offering strong corrosion resistance and a wide range of color options. |
| Electroplating | Deposits a thin metal layer onto milled components to enhance corrosion resistance, wear resistance, or electrical conductivity. |
| Black Oxidize | A chemical conversion coating mainly used on steel milled parts to provide mild corrosion protection and a uniform black appearance. |
| Passivation | Improves corrosion resistance of stainless steel milled parts by removing surface contaminants and free iron. |
| Heat Treatment | Alters material properties of milled parts to improve hardness, strength, or wear resistance based on application requirements. |
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 |
| Maximum Part Size | Up to 1200 × 850 × 600 mm |
| Minimum Feature Size | 0.3 mm |
| Surface Finish (As Machined) | Ra 1.6–3.2 µm |
Discover the key strengths that make us a trusted partner for precision CNC milling, from engineering support to advanced equipment, high accuracy, and flexible material and finishing options.
We audit your designs for manufacturability, suggest performance upgrades, and align every detail with your production goals.
3-, 4-, and 5-axis CNC mills handle simple to complex geometries with tight tolerances for consistent accuracy.
In-process inspections and final checks ensure defect-free components. Critical features can be machined to ±0.005 mm.
Over 100 metals and plastics are available, with finishes like anodizing, powder coating, electroplating, and polishing.
From single prototypes to low- and high-volume runs, we provide consistent quality for CNC-milled components.
BIE serves clients worldwide, offering reliable shipping to ensure smooth production and delivery for international customers.
From design upload to delivery, follow a streamlined process to get your precision CNC-milled parts quickly and reliably.
Submit your 2D drawings or 3D CAD files with material, tolerance, and surface finish requirements.
Our engineers review your design and provide a detailed quotation and estimated lead time, usually within 24 hours.
Parts are machined to specification, with in-process inspections and final checks to ensure accuracy and quality.
Finished parts are carefully packed and shipped globally, ready for use or assembly.
Copyright © Dongguan BIE Hardware Co., Ltd - Privacy policy
