Can Be a Cog in the Wheel?

One who holds a minor but necessary post in a large organization, as in Frank knew he was just a cog in the wheel of this giant corporation. This term alludes to the role of the mechanical cog, one of the teeth on a wheel or gear that, by engaging other teeth, transmits or receives motion.

Is a cog in the machine?

Someone or something that is functionally necessary but of small significance or importance within a larger operation or organization.

Do wheels have cogs?

Each wheel has cogs, or tiny teeth that fit together, making the wheel turn, the engine run. Every cog is essential to that engine.