# How are these components called? [closed]

I need to build a structure like the one in the picture below. Basically, it is a pendulum that holds a measurement hammer and lets it oscillate without friction. I don't know how to find the two necessary components (the one that holds the hammer and the one that is fixed on the shaft). How are they called?

• Are you talking about the entire assembly? A subassembly? One part? It isn't clear from the image what you want named. Part of this may be because certain components are visually overlapping. (The image is appreciated, but may be insufficient to answer the question.) – wwarriner Oct 14 '16 at 20:43