# crank

(redirected from Crank Case)
Also found in: Dictionary, Thesaurus, Medical.
Related to Crank Case: crankcase breather

## crank,

mechanical linkage consisting of a bar attached to a pivot at one of its ends in such a way that it is capable of rotating through a complete circle about the pivot. One of the principal uses of a crank is to turn reciprocating, or back and forth, motion into rotary motion or vice versa. A bell crank is one designed to change the direction of a linear motion.

## Crank

the simplest rotating part of a crank mechanism. It has a cylindrical projection, the pin, whose axis is displaced relative to the axis of rotation of the crank by a distance r, which may be fixed or variable (see Figure 1).

Figure 1. Types of crank: (a) with constant radius r of pin displacement, (b) with r regulated by a slide, (c) with r regulated by a rotating disk

## crank

[kraŋk]
(mechanical engineering)

## Crank

In a mechanical linkage or mechanism, a link that can turn about a center of rotation. The crank's center of rotation is in the pivot, usually the axis of a crankshaft, that connects the crank to an adjacent link. A crank is arranged for complete rotation (360°) about its center; however, it may only oscillate or have intermittent motion. A bell crank is frequently used to change direction of motion in a linkage (see illustration). See Linkage (mechanism)

Cranks (a) for changing radius of rotation, and (b) for changing direction of translation

## crank

In a mechanical linkage or mechanism, a link that can turn about a center of rotation. The crank's center of rotation is in the pivot, usually the axis of the crankshaft, that connects the crank to the adjacent link. A crank is arranged for complete rotation (i.e., through 360°) about its center; however, it may only oscillate or have intermittent motion. A bell crank is frequently used to change the direction of the motion in a linkage.

## crank

1
1. a device for communicating motion or for converting reciprocating motion into rotary motion or vice versa. It consists of an arm projecting from a shaft, often with a second member attached to it parallel to the shaft
2. a handle incorporating a crank, used to start an engine or motor

## crank

2, cranky
(of a sailing vessel) easily keeled over by the wind; tender

## crank

(Automotive slang) Verb used to describe the performance of a machine, especially sustained performance. "This box cranks (or, cranks at) about 6 megaflops, with a burst mode of twice that on vectorised operations."
References in periodicals archive ?
Tenders are invited for Servo Press-150 Rr Of M/S-Ioc Or Hycom-150P Of M/S Hpc Or Mak Compressor Oil-150 Of M/S Bpc For Expressor/Compressor Crank Case Oil As Per Rdso.
Tenders are invited for Expressor / Compressor Crank Case Oil Of 1 M/S.
Tenders are invited for Set Of Clamp Assembly For Water Testing In Machined Emd Crank Case Consist Of 1 Clamp Assembly Set For Water Testing In Machined Emd Crank Of Case Of Ref.
On inspection of the quad afterwards Jack found both crank cases had split and his engine had lost nearly all its oil.
It is equipped with an upgraded four-stroke, parallel-twin engine, coupled with new age pistons, crank cases and cylinders.

Site: Follow: Share:
Open / Close