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Crank power

From Appropedia

The crankW is one of the oldest methods of converting human power to mechanical power. Since the invention of the electric generator, cranks are also used for small-scale electricity generation.

Cranks are normally hand-operated. It is important to note that operating a crank can rapidly become tiring. For many applications pedal power (which uses the larger leg muscles) may be a better option.

Hand-cranks are still often a good choice for small-scale mechanical grinders (e.g. coffee grinder), millers, rollers (e.g. pasta machine), shellers, and the like.

Some small-scale water pumps are also hand-cranked.

Hand cranked and (foot powered) electoronic machinery is making a small come back.

The word "crank" is also used for mechanical linkages that convert reciprocating linear motion into rotary motion or vice-versa.