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The '''crank'''{{wp sup| Crank (mechanism)}} 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. | The '''crank'''{{wp sup|Crank (mechanism)}} 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. | 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. | ||
Revision as of 14:14, 11 April 2010
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.
- http://www.appropedia.org/Low_cost_computer_guide#Crank_power
- http://www.treehugger.com/files/2006/05/sonys_handcrank_1.php
The word "crank" is also used for mechanical linkages that convert reciprocating linear motion into rotary motion or vice-versa.