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# crankshaft

«crankshaft» in Mova's school dictionary: **a long metal rod in an engine that turns the up-and-down…** — its meaning for a pupil, its sense in the lessons and examples.

### part of speech

noun (a crankshaft, crankshafts)

### meaning for a pupil

A crankshaft is a long metal rod in an engine that turns the up-and-down movement of the pistons into turning (spinning) movement that drives the wheels. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#m1)

### sense in the lessons

In science and design technology, the crankshaft is an example of a mechanism that changes one kind of motion into another, like the pedals and crank of a bicycle. Cars, motorbikes, boats and old steam engines use crankshafts.

### examples

- The pistons push the crankshaft round. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x1)
- A broken crankshaft means the engine cannot work. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x2)
- A bicycle's pedals turn a crank, a little like a crankshaft. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x3)
- The mechanic showed us the crankshaft inside the old engine. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x4)
- In D&T we built a model with a crankshaft that made a toy bird flap. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x5)
- Steam engines used a crankshaft to turn their wheels. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/#x6)

### note

Countable. A «crank» is a handle or arm bent at a right angle that you turn; a «shaft» is a long rod. Crank also has an informal meaning: a strange person with odd ideas.

### Trees and pragmatics

[Every meaning and example of «crankshaft» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/C/crankshaft/), each sentence with its dependency tree and frames.