Page 9 - Demo

7 GENERAL DRILLING HANDBOOKEnd Condition (Figure 1.1.2) %u2022 Through hole (also called a thru-hole or clearance hole) - this type of hole extends completely through the entire thickness of the workpiece.%u2022 Blind hole %u2013 this type of hole has a specific depth and does not extend completely through the workpiece.Figure 1.1.2 Through Hole Blind HolePassability of Hole (Figure 1.1.3)%u2022 Interrupted hole %u2013 is characterized by one or more interruptions or recesses along the surface surrounding the central axis of the hole. These interruptions could be the result of intersecting features, such as grooves, slots, or cross-holes.%u2022 Solid/ Whole hole - has a continuous, uninterrupted surface around the central axis of the hole.Figure 1.1.3Interrupted Hole Solid / Whole Hole