Understanding which machine tool is best suited for machining which material can assist machining factories and machine tool agents in making the optimal choice. This article introduces the materials that can be most effectively machined by CNC milling machines, CNC lathes, and CNC machining centers.

CNC milling machine

The three-axis CNC milling machine is a powerful equipment. It can easily and quickly machine aluminum and copper, and achieve fine surface treatment. With a sturdy body and appropriate spindle speed (6,000–10,000 RPM), it can also process steel components such as brackets, fixtures, and templates. Coupled with sharp cutting tools and air cooling, these machines can efficiently machine plastics. The five-axis CNC machining center extends this capability to complex parts made of all four materials, thereby reducing setup steps and improving accuracy.

CNC lathe

CNC lathes have become the preferred choice for machining cylindrical parts by rotating the workpiece. Aluminum and copper can be high-speed turned on standard flat-bed CNC lathes, achieving good results. Steel, on the other hand, requires a stronger slant-bed CNC lathe to absorb cutting forces, maintain dimensional accuracy, and control chip flow. Choosing the appropriate lathe configuration largely depends on the hardness and thermal properties of the material.

Vertical machining center

Vertical machining centers excel in end milling, grooving, drilling, and tapping. For aluminum, vertical machining centers equipped with high-speed spindles (10,000–15,000 RPM) can achieve short cycle times and mirror-like finishes. With a high-torque spindle and rigid structure, the same machine can cut steel. Copper and plastic can also be easily processed on vertical machining centers when cutting parameters are optimized to prevent burrs and melting. This versatility makes vertical machining centers a popular choice for processing mixed materials.

Horizontal machining center

Horizontal machining centers are highly suitable for machining steel and other hard metals, as their spindle orientation facilitates chip removal under gravity. This is particularly beneficial when machining wear-resistant carbon steel or alloy steel in large quantities. Horizontal machining centers can also process aluminum, but their true strength lies in machining heavy, multi-faceted steel parts such as engine blocks and pump casings. For copper and plastic, horizontal machining centers are less commonly used, unless the geometry of the part requires multi-faceted machining in a single setup.

Matching between machine and material

Use three-axis or five-axis CNC milling machines to process aluminum, copper, plastic, and general steel materials.

For machining round parts made of these four materials, a CNC lathe is chosen.

In a workshop environment with mixed materials, a vertical machining center is chosen.

When producing large quantities of steel, a horizontal machining center is chosen.

By matching machine types with materials, the workshop can maximize efficiency and component quality. Leyo Machine offers a complete range of CNC milling machines, CNC lathes, and CNC machining centers, which can be configured according to the materials you process on a daily basis.