impact crater

Today’s banner: an impact crater, steel having smashed into aluminum at the mind-numbing speed of — wait for it — zero. After we’ve center- or prick-punched a tiny indentation in the aluminum surface, this is what it looks like up close:

To make such an indentation, one carefully aligns the tip of a punch to the desired spot on the workpiece surface, and then carefully taps the other end of the punch with a small hammer. As in our previous blog posts, the black vertical lines in this image are the rules of an inkjet-printed millimeter ruler, presented for scale. As you can see from the crosshairs, we totally nailed it.

Here’s a closer image of another punch, which, again, we nailed:

Sleep well tonight — stochastic.