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Crankshaft
(redirected from Crankshafts)

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crankshaft
a shaft having one or more cranks, esp the main shaft of an internal-combustion engine to which the connecting rods are attached

crankshaft [′kraŋk‚shaft]
(mechanical engineering)
The shaft about which a crank rotates.

Crankshaft 

a shaft consisting of one or more cranks and several coaxial crank journals resting on bearings.

Each crank of the crankshaft has two flanges and a journal for attaching a connecting rod. The axes of a crankpin are displaced relative to the axis of rotation of the crankshaft. In order to balance the crankshaft in operation, the flanges often have counterweights. The crankshaft is the rotating unit of a crank gear; it is used in piston engines, pumps, compressors, and forging and pressing machinery. In piston engines, the number of cranks on the crankshaft is usually equal to the number of cylinders, the arrangement of the cranks depends on the operating cycle and the conditions for counterbalancing the engine and arranging the cylinders.

Crankshafts are made whole, cast, or forged of carbon steel and alloy steel or high-strength cast iron. However, since antifriction bearings cannot be used with whole crankshafts, built-up crankshafts are sometimes made. Depending on production conditions, large crankshafts (journal diameter, to 1 m) can also be of built-up design. The simplest crankshafts to produce are those in which the axes of all of the crankpins are located in a single plane. The simplest crankshaft is the crank.



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RAIB did not call for a full investigation but has written to operators asking them to check their systems for checking for flaws in crankshafts.
Tokyo) whose products include grinders for crankshafts.
SMI also developed and introduced pearlitic malleable iron (known as Armasteel) in 1936, which was used extensively for military applications during WWII and the Korean War and also for the conversion of crankshafts and connecting rods from steel forgings to cast components in the 1950s.
 
 
 
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