CNC Machining

A machining method for processing parts on CNC machine tools. The process specifications of CNC machining are generally consistent with those of traditional machine tools, but significant changes have taken place. It uses digital information to control the displacement of parts and tools. It is an effective way to solve problems such as wide part variety, small batch sizes, complex shapes and high precision, and to achieve efficient and automated machining.

CAD Model Design Elements

Dimensions

Maximum milling dimensions: 254×178×95 mm
Maximum milling depth: 50 mm from any face of the workpiece toward the center
Minimum and maximum workpiece machining diameter: 4 mm and 75 mm
Minimum and maximum machining length: 6.4 mm and 228 mm
ABS, POM and aluminum profiles can provide larger machining dimensions
Workpieces with a diameter of less than 0.7 mm or a wall thickness of less than 0.5 mm cannot be machined.

Wall Thickness

Unlike injection molding, CNC can machine workpieces with very thin walls that will not sag or deform, and there is no requirement for uniform wall thickness. However, machining with a wall thickness of less than 0.5 mm is not recommended.

Milling Shapes

During milling, the milled area will leave some sharp edges (rounded edges). A highlight of our automated machining is that material codes and dimension data are left on your workpiece.

Material

We can cut, turn and mill more than 30 types of plastics and metals. Below are some commonly used turning and milling materials:

ABSPVCPOMPTFEAcrylicPEEKNylonPELPCAluminum alloyCopper alloyMagnesium alloySteel / steel alloyBrassPP

Machining Tolerance

Typically, for well-designed parts, machining tolerance can reach +/-0.13 mm.

Engraving on Workpieces

The minimum engraving size is 0.5 mm, and the minimum spacing between characters is also 0.5 mm. Furthermore, if the design allows, please embed the machined text deeply into the workpiece surface — this is best for legibility.

Surface Finishing

All machined plastic parts may leave "milled" burrs — visible tool marks on the part edges. Metal parts such as magnesium alloy will also show "milled" marks like plastics. Softer metals such as copper alloy, brass and aluminum alloy can be given a pearl surface treatment by sandblasting. Harder alloys such as steel have burrs removed at high temperature, but some sharp chamfers or burrs may remain.