What Is The CNC Machining Process?

- Sep 30, 2017-

In Industry it is not efficient or profitable to make everyday products by hand. On a CNC machine it is possible to make hundreds or even thousands of the same item in a day. First a design is drawn using design software, then it is processed by the computer and manufactured using the CNC machine. So, do you want to know what is cnc machining process? Let me tell you.

CNC machining has these processes as bellow:


This is the first stage of machining where the object is to quickly remove the bulk of the waste material, normally with the aid of a ripper cutter (see cutters below), this gives the coarse stepped feature seen in the workpiece above.

Semi Roughing

This stage of machining generally uses a smaller cutter than roughing, typically an end mill, although the aim is still to remove the bulk of the waste material.

Semi Finishing

The next stage, using a relatively large ball nosed cutter, is to start to form the final profile of the workpiece, removing the steps generated in the two above procedures.


The final stage, and the longest process of all, is the final cut to the desired size. A small ball nosed cutter traversing across the surface produces the finished shape.

Although this is the final machining stage there is still much work to do in the form of hand polishing and finishing before the product is complete.

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