A cog is a wheel with projecting teeth. These can turn either another cog or a chain.
A wheel that has teeth that fit into the teeth of another wheel is called a gear.
A name for a projecting knob could be a "pull handle" or a "drawer pull."
The teeth are usually provided on the pinion of the spur wheel, to drive the spur wheel.
The teeth are usually provided on the pinion of the spur wheel, to drive the spur wheel.
That is a 'cog' wheel.
Outrigger
the thing (wheel) on which you wind the film befor transport, storage of projecting (Skillworks: Reel
A projecting tooth is commonly referred to as a "protruded tooth" or "protruding tooth." In orthodontics, this condition can also be described as "overjet," where the upper front teeth extend significantly beyond the lower front teeth. This misalignment can affect bite function and aesthetics, often requiring orthodontic treatment to correct.
Such a wheel might be called a gear or a cog.
trap
the incus
Yes, or a chain, or a cable. And the "wheel" may have teeth - a sprocket wheel.