The radius of a circle described by a crank, cam, or similar machine part. Heritage.

using a prybar between
CRANK THROW and block web

The drive linkage consists of the crank throw, the connecting rod, the piston rod, the pivot post and the pivot arms. The crank throw is made from 3/8" H.R.S. and is brazed to the end of the crankshaft.... The connecting rod is an aluminum casting and it pivots from the end of the crank... The pivot arms are made from aluminum bar stock. The pivot bushing is lubricated with a grease cup and the piston rod is lubricated with oil..
http://www.lindsaybks.com/dgjp/djgbk/atkin/

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Note added at 2002-09-12 08:53:38 (GMT)
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Court -
Court-Zee Engine. Here\'s a twin flywheel mill type horizontal engine that uses a single crank throw.The crank pin (.125 \") is pressed into the right flywheel ...
npmccabe.tripod.com/courtzee.htm

Rosinante
... Both power pistons operate off of the same crank throw and since they are located 90 degrees to one another, the left piston leads the right piston by 90 ...
www.geocities.com/~rrice2/richard/rosinant.html

RE animation -
... Primary reciprocating forces (represented in blue) can easily be balanced by the addition to counterweights on each side of the crank throw, as their resultant ...
www.cke-tech.com/RE_animation.htm

Crankshaft Terminology -
... Each CRANK (throw) of a shaft consists of three parts, two webs and a pin, as shown in figure 4-19. Crank webs are sometimes called cheeks or arms. ...
www.tpub.com/engine3/en3-53.htm