Custom CNC Milling Services in Vietnam

At OSM, we offer a range of CNC milling machines to meet diverse manufacturing requirements. Our facility is equipped with 3-axis and 4-axis CNC milling machines.

Our 3-axis machines are well suited for standard machining operations, handling basic cutting processes along the X, Y, and Z axes.

Our 4-axis machines add a rotary axis, allowing us to machine more complex geometries and produce parts more efficiently, especially components with features that require continuous machining around the fourth axis.

These machines allow parts to be machined from multiple directions, reducing the need for multiple setups while ensuring high accuracy, consistency, and quality in every part we produce.

Our CNC milling tolerances depend on the machine type, material, and geometry of the part.

• Standard tolerances follow ISO 2768-m (metals) and ISO 2768-c (plastics).
• Typical general tolerance: ±0.05 mm.
• High-precision 4-axis CNC milling can achieve tolerances as tight as ±0.01 mm for critical features.

For tighter tolerance requirements, we recommend specifying them directly on your technical drawings so our engineers can optimize tooling, inspection methods, and machining costs.

Lead time depends on the complexity of the part and the number of machining axes:

• Simple 3-axis machined parts can be delivered in as little as 3 days.
• Most CNC milling projects are completed within 5 business days.
• Expedited delivery options are available for urgent production requirements.

CNC milling is ideal for complex geometries, slots, pockets, and contours, while CNC turning is best suited for cylindrical parts such as shafts and bushings.

If your part combines both rotational and prismatic features, combining CNC milling and turning may be the most efficient solution.

Vertical CNC milling machines, with a vertically oriented spindle, are ideal for precision machining of smaller parts, offering excellent visibility and flexibility for operations such as drilling and boring.

Horizontal CNC milling machines, with a horizontally oriented spindle, are better suited for larger and heavier parts, providing greater stability and more efficient chip removal. For projects requiring heavy material removal and high rigidity, horizontal milling is often preferred.

In contrast, vertical CNC milling is well suited for complex parts that require precision and detailed machining features. The choice between these machine types depends on the specific requirements of each CNC milling project, whether for precision machining or high-volume production.

In CNC milling, tool offset refers to the correction values used to compensate for the actual dimensions of a cutting tool, primarily its length and diameter, during machining. These values allow the machine control system to accurately determine the tool’s position relative to the workpiece.

Properly setting tool offsets enables operators to establish the correct machining starting position and ensures that the cutting tool follows the programmed coordinates accurately. Accurate tool offset settings are essential for maintaining dimensional accuracy, consistency, and repeatability in CNC milling operations.

CNC milling is a subtractive manufacturing process in which material is removed from a solid workpiece using computer-controlled rotating cutting tools.

CNC milling is widely used to produce precision parts with complex geometries, tight tolerances, and consistent quality. The technology supports multi-axis machining, including 3-axis, 4-axis, and 5-axis machining, enabling efficient production of features such as pockets, slots, holes, and complex contours.

At OSM, CNC milling is used for functional prototypes, low-volume production, and end-use parts across industries including automotive, aerospace, medical equipment, energy, and industrial machinery.

CNC milling machines can process a wide range of materials. Common metals include aluminum, brass, and steel, each offering different properties for specific applications. CNC milling is also effective for a variety of engineering plastics, which are valued for their versatility and machinability.

This broad material compatibility allows CNC milling to meet diverse manufacturing requirements across industries, from aerospace and automotive to medical equipment, industrial machinery, and consumer products, making it a highly versatile solution for custom part manufacturing.

• 3-axis milling is ideal for simple geometries and flat features

• 4-axis milling enables machining around multiple sides with fewer setups

• 5-axis milling is best for complex geometries, tight tolerances, and parts requiring multi-angle machining

Choosing the right axis configuration can significantly reduce lead time and improve accuracy.

A CNC milling machine consists of several key components that work together to achieve precise machining results. The machine frame provides structural stability, while the spindle rotates cutting tools at high speeds to remove material. The machine table securely holds the workpiece and moves along the X, Y, and Z axes.

Other essential components include the CNC controller, which reads and executes machining programs; tool holders, an automatic tool changer (ATC), a coolant system, and workholding fixtures. Each component plays an important role in maintaining machining accuracy, surface quality, and production efficiency.

In CNC milling, various cutting tools are used to create different shapes and surface features. Common tools include End Mills, Face Mills, Ball Nose End Mills, Corner Radius End Mills, Chamfer Mills, Drills, Reamers, and Taps.

Selecting the right cutting tool helps ensure optimal accuracy, surface quality, and machining efficiency, while also reducing machining time and minimizing tool wear.

Design For Manufacturability (DFM) focuses on creating parts that are easier to machine and more cost-effective to produce. Simple design changes — such as increasing internal corner radii, avoiding excessively deep pockets, maintaining appropriate wall thickness, and specifying standard hole sizes — can significantly reduce machining time and tooling requirements.

Applying realistic tolerances only where necessary can also help reduce inspection and machining costs. Optimizing the design before production not only reduces manufacturing costs but also improves part quality and shortens lead times.