What characterizes a blind hole?

A blind hole is characterized by starting on one surface of the workpiece and not extending all the way through to the opposite side. This means that while it is an enclosed cavity that can be accessed from only one side, it does not allow visibility or access to the other side, setting it apart from through holes, which penetrate entirely through the material.

Understanding blind holes is essential in manufacturing and machining processes, as they often require specific tools and techniques for drilling or finishing since the tool cannot exit through the opposite side. This type of hole is often used for applications like counterbores, which are designed to accommodate screws or bolts that need to sit flush with the material surface.