crankshaft

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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

 

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.

crankshaft

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

crankshaft

crankshaft
The central component of a reciprocating engine, a high-strength, alloy steel shaft with a hardened and polished bearing surface that rides the bearing in the crankcase. The propeller of an aircraft and the rotor transmission system of a helicopter is driven by the crankshaft.
References in periodicals archive ?
The center part of crank shaft also experiences zero torsion force and the torsion increases radially towards the outer surface reached maximum on surface (periphery).
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Honda Siel Cars India (HSCI), the joint venture between the Japanese auto giant and the Siel Group, is exporting 60,000 sets of crank shafts and connecting rods from its second plant at Tapukara, Rajasthan to Honda.
will supply its products, including drive shafts, crank shafts and connecting rods for engines, to Honda's automobile assembly factories in China, it said.
The new plant will initially accommodate machining and assembly of transmissions and drive shafts as well as machining of crank shafts and connecting rods for engines.
The German company Machinenfabrik Alfing Kessler GmbH awarded a SEK17m contract for rough forged blanks for crank shafts.
The company, which employs 240 people, makes automotive parts like suspension components and crank shafts.