CNC Machining

About CNC Machining

CNC (Computer Numerical Control) machining is a precision subtractive manufacturing process that uses computer-controlled machine tools to remove material from a solid workpiece. The process begins with a digital CAD model, which is converted into a set of machine-readable instructions (G-code). These instructions guide cutting tools such as mills, lathes, drills, or grinders to shape the raw material into the final component.

Unlike manual machining, CNC machining is automated, highly accurate, and repeatable, making it an essential technology for industries that demand consistency and tight tolerances.

Advantages

Achieves tight tolerances down to microns, ideal for complex designs.

Provides smooth finishes, often eliminating the need for further polishing.

Compatible with metals (steel, aluminum, titanium, copper), plastics, and composites.

Ensures identical parts across small or large production runs.

Speeds up product development and reduces lead times.

Capable of producing 2D, 3D, and multi-axis complex components.

Detailed Process Steps

1.CAD Design

A 3D CAD model of the part is created with precise dimensions.

3.Machine Setup

The workpiece material is clamped, and cutting tools are installed in the CNC machine.

2.CAM Programming

The CAD file is converted into CAM instructions, generating toolpaths for the CNC machine.

4.Machining Operation

The CNC machine executes programmed toolpaths to cut, mill, drill, or turn the material into the final shape.

5.Finishing & Inspection

Post-processing such as deburring, polishing, heat treatment, or coating is applied, followed by quality inspection.

Examples of CNC Machining

Casting vs CNC Machining

Aspect Casting CNC Machining
Best For Large, complex shapes; bulk production High-precision, complex details; prototypes and small to medium batches
Material Use Wide range of metals and alloys Metals, plastics, composites
Precision & Tolerance Moderate (depends on casting method) Very high (±0.01 mm)
Surface Finish Rougher, often needs machining Excellent finish, often ready-to-use
Production Speed Fast for large volumes Fast for prototypes, slower for high-volume
Cost Efficiency Low cost per part in mass production Higher cost per part, economical for precision parts
Design Flexibility Great for large, hollow, or complex shapes Best for precise geometries and fine details
Typical Industries Automotive, heavy machinery, energy Aerospace, medical, electronics, automotive precision parts

FAQs

A: Metals (steel, stainless steel, aluminum, titanium, copper), plastics, and composites.

A: Typically ±0.01 mm, depending on material and machine setup.

A: Milling uses rotating cutting tools, while turning rotates the workpiece against a stationary tool.

A: Yes, especially when combined with automation, but it is also efficient for small batches and prototypes.

A: CNC machining offers higher precision and better surface finishes, while casting is more cost-effective for very large or complex parts.

Let’s Build Your Next Great Component

Whether you have a complete CAD model or are in the early stages of design, we can provide expert guidance on material selection, process optimization, and design for manufacturability to ensure your project’s success.