cog

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cog

1. any of the teeth or projections on the rim of a gearwheel or sprocket
2. a gearwheel, esp a small one

cog

[käg]
(design engineering)
A tooth on the edge of a wheel.
(electricity)
A fluctuation in the torque delivered by a motor when it runs at low speed, due to electromechanical effects. Also known as torque ripple.

cog

In a cogged joint, the solid portion which is left in a timber after it has been notched.