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CNC Milling : Classification Overview

CNC machining, short for Computer Numerical Control machining, is a cutting-edge manufacturing process that utilizes computerized systems to control machining tools and equipment. This technology allows for precise and efficient production of parts and components across various industries.

CNC machining is a manufacturing process that utilizes computerized systems to control machining tools.This sophisticated technology allows for the automated and precise shaping of materials, resulting in intricate and accurate components.

In the realm of modern manufacturing, Computer Numerical Control (CNC) machining has revolutionized the way intricate parts and components are crafted with precision. CNC machining is a process that involves the use of computerized systems to control machine tools and equipment. The acronym CNC stands for Computer Numerical Control, highlighting the reliance on numerical data to guide the machinery. Unlike traditional manual machining, CNC machining allows for automated, highly precise, and efficient production.

What is CNC milling

It is a computer-controlled process involving using a cutting tool to remove part of a workpiece. The basic setup involves placing the workpiece on the machine’s table while the cutting tool/s attached to the spindle rotates and moves to shape the workpiece into a finished product.

The rotation and movement of the cutting tool depend on the CNC milling machine type and level of sophistication. The process is highly versatile and compatible with various materials such as aluminum, plastics, wood, and glass.

Types of CNC Milling Operations

CNC milling has several operations with different setups and applications. Below are the common types of operation.

Face Milling

In face milling, the cutting tool’s (face milling cutter) rotating axis is perpendicular to the workpiece surface.

The face milling cutter has a unique design notable in its interchangeable cutter inserts. It delivers cutting action using its multiple cutting teeth. As a result, face-milled parts have higher quality surface finishing. Also, the process is in close control, making it easy to produce your desired surface easily.

Plain Milling

Plain milling is a column and knee operation used for milling plain horizontal surfaces. The cutting tool lies parallel to the workpiece. Therefore, cutting occurs from one end of the workpiece to the other. Operators can feed the table longitudinally, cross, or vertically.

CNC milling
CNC milling

Angular Milling

Angular milling involves milling flat surfaces using a cutting tool at an angle. The process is like plain milling, the only difference being the angular setup.

There are two angular milling cutters: single angle and double angle. The single-angle cutters have teeth on the cutter’s angular face and large flat sides and are suitable for working at angles of 450 or 600.

The double angular milling cutters have V-shaped teeth with conical surfaces and are the better option for milling flat surfaces at 45°, 60°, and 90°.

Form Milling

Form milling is the better method for making irregular contours on a workpiece. The contour can be curved or curved with straight lines. The contours can be concave or convex and are made with teeth opposite such shapes. Consequently, to make a product with a concave edge, the form milling cutter should have a convex edge.

Form milling is a little slower (about 20 to 30%) than regular milling due to the more intricate cutting to make curved surfaces.


CNC milling services offer precision, accuracy, and versatility in the production of components with different shapes and sizes. These services are essential in modern manufacturing, providing a cost-effective and efficient solution for various industries. With the ability to produce custom parts and materials, CNC milling services play a crucial role in the development and production of innovative products.