In the drilling operation a drilling tool (drill) performs a two-edged cylindrical cavity in the part. The movement of the tool is a combination of rotation and rectilinear displacement (along the axis of the hole).
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Drilling
A variant of the drilling is the reaming of the drilling hole, where a tool similar to the drill, but with multiple edges, remove material from a hole, increasing its diameter, while giving it a high degree of finish.
This is a typical process of finishing.
Cilindrical finishing reaming
Conical roughing reaming