Drilling is the most common machining process. One estimate is that 75% of all metal-cutting material removed comes from drilling operations. Drilling involves the creation of holes that are right circular cylinders. This is accomplished most typically by using a twist drill. The figure below illustrates a cross section of a hole being cut by a common twist drill:

Drilling Characteristics

The characteri stics of drilling that set it apart from other powered metal cutting operations are:

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In any drilling operation, the following factors are important:

Parameters of drilling

Related Operations

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