With the right prompt, Stable Diffusion can turn anything into a mechanical device. I'll start out with just some generic mechanical devices. None of these have any identifiable function, but they have gears, dials, screens, pins, screws, brackets, etc. Then I'll show you some organic creatures (both real and imaginary) that Stable Diffusion has converted into a mechanical device.
These illustrations were drawn using Stable Diffusion 2.1.