How do they get the graphite leads into a pencil?

Contrary to popular belief, it is not as if a hole was drilled into the pencil and the lead was inserted into it. It is simply two halves being glued together.

Below is the pictorial representation of how a single block of wood is made into pencils:

Here is the top/bottom view of how it would look like:

Here is yet another step-by-step process of pencil making...