Some light hints that may point you in the right direction:

Hint 1

The assembly is a part of a larger machine.

Hint 2

Several assemblies are meant to move side by side in unison.

Hint 3

The square-ish shaped piece is plastic that will wear down and be replaced.

  • BubsOPEnglish
    4•8 hours ago

    I figured it would be a tough one.

    These are mail insertion machines I worked on for several months as a mechanic. It’s a little blurry since that were moving, but here it is in action:

    • MajorllamaEnglish
      2•7 hours ago

      That’s cool. Never seen anything like that. I love big industrial machines that exist only to recreate an action a single human can do easily lol