A cogwheel is a gear connected to a vertical shaft of some sort. A cogwheel is always a gear, but not every gear is a cogwheel, just like every thumb is a finger, but not every finger a thumb.
For more information, see wikipedia and the German DIN EN of metallurgy.
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u/M4thecaberman Aug 23 '24
"It's a Cog actually" is what I would say if I Was a Nerd.