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Machining Operations

When it comes to machining, there are a number of operations that must occur in a pre-determined sequence , some of which are operations are milling, turning , drilling, planing, broaching, sawing and so on.

For the purpose of this course, let us look at the difference between turning, drilling and milling.


In a turning operation, the workpiece is rotated as a single point cutting tool travels in a linear direction. This produces a cylindrical shape. Often with turning operations, a lathe is the preferred machine to use.


Drilling operation is used to create a round hole in a workpiece, usually with a drilling bit with two cutting surfaces.


With milling, a multiple-cutting-edge tool is moved across a workpiece to cut a plane or straight surface. The two major types of milling operations are peripheral milling and face milling. Peripheral milling cuts deep slots, gear teeth, and threads. Face milling cuts flat bottomed cavities and flat surfaces into the workpiece using a feed that can be either vertical or horizontal.

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