| Rating | Solver | Clue |
|---|---|---|
| COG | Wheel tooth | |
| DENT | A tooth, as of a card, a gear wheel, etc. | |
| FLANK | That part of the acting surface of a gear wheel tooth that lies within the pitch line. | |
| LEAD | The action of a tooth, as a tooth of a wheel, in impelling another tooth or a pallet. | |
| ESCAPEMENT | The contrivance in a timepiece which connects the train of wheel work with the pendulum or balance, giving to the latter the impulse by which i... | |
| CLEARANCE | ...as the distance between the piston and cylinder head at the end of a stroke in a steam engine, or the least distance between the point of a cogw... | |