crankshaft

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Related to Crankshafts: Connecting rods

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 ?
BFL is currently the only crankshaft maker in India for the industrial sector.
Regular repairs of marine diesel engine crankshaft main and crankpin journals surfaces are therefore needed in order to perform partial or complete renovation of the worn crankshaft journals.
Key words: numerical modeling, marine internal-combustion engine, crankshaft, stresses
The derailment was caused when the rear axle passed over it, but the engine was well within a 400,000 mile limit for checks on the crankshaft.
Crankshaft manufacturers, for example, are constantly driven to improve product strength, reliability, and quality.
In Japan, Sumitomo Metals produces forged crankshafts for passenger cars, trucks, construction machines and other machinery at the Osaka Steel Works in Osaka City, which belongs to the Railway, Automotive & Machinery Parts Company, with an annual capacity of approx.
GMRC and PRCI funded a successful demonstration project for the SDCM and a number of subsequent commercial applications have shed light on failed crankshafts, and guided operation of specific units.
MAPE is a leading mechanical integrator specialized in crankshafts, balance shafts, camshafts and connecting rods and is already a supplier to the Volvo Group.
What: The CrankStar, a tape-based superfmishing machine for crankshafts with minimal bearing clearances
Detroit three automakers are shifting from cast crankshafts to forged ones as they downsize and improve the performance of the engines to meet higher fuel efficiency requirements.
The initial step in this study is to review laser build-up welding know-how, which at first glance seems to be an excellent, tailor-made solution for shipboard crankshafts repairs.
The company, which employs 120 people at its factory in Cornwall Road, exported its crankshafts to many countries over the last twelve months including Mexico, China, Turkey and throughout continental Europe.