Hole: Drill to depth

This is shown as a drill operation in the tree view and is turned on or off with the Drill attribute. The Chip Break and Deep Hole cycles also affect the behavior. Actual diameter may be undersized depending on later actions such as tapping or reaming operations.

The actual depth of the twistdrill operation is determined as follows:

• Drilled Depth = depth + (diameter / 2.0) / tan(Angle_of_drill / 2.0)
• If the Through option is selected, then add 0.1*Diameter.