Which of the following is NOT a common type of machining process?

The reason bonding is identified as not a common type of machining process lies in the fundamental definition of machining itself. Machining refers to various processes used to remove material from a workpiece to shape it into desired dimensions and features. Common machining processes typically include turning, milling, and drilling, all of which involve cutting away material using specific tools.

Turning is a process where the workpiece rotates while a stationary cutting tool removes material, primarily for creating cylindrical shapes. Milling involves the movement of a workpiece against a rotating cutting tool to create flat or contoured surfaces. Drilling is the process of creating holes in a workpiece using a rotating drill bit.

In contrast, bonding pertains to methods of joining materials together rather than subtractively machining them. This can involve adhesives, welding, or other techniques that do not remove material but instead combine separate pieces into a single entity. Therefore, it does not fit within the category of common machining processes, making it the correct choice for this question.