Dead Center

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Related to Dead Center: Top dead center

dead center

[¦ded ′sen·tər]
(mechanical engineering)
A position of a crank in which the turning force applied to it by the connecting rod is zero; occurs when the crank and rod are in a straight line.
A support for the work on a lathe which does not turn with the work.

Dead Center


the extreme position of a piston in the cylinder of a piston engine, at which the motion of the piston changes direction. The piston position at the greatest distance from the crank is known as top dead center, and the position closest to the crank is known as bottom dead center. When the piston is at dead center, its velocity is zero, and the forces acting upon it do not generate an impulse (momentum) for displacement of the crank. In theoretical mechanics the positions of the piston at dead center are sometimes called limit positions (points).

References in periodicals archive ?
8): carrier dog (6); knurled dead center (7); driving plate or driving pins (8); chuck with two self-adjusting jaws (9); chuck with three self-adjusting jaws (10).
In "Century Dead Center," a series of thirty prose poems, the presence of the Holocaust permeates all the scenes, whether they be of a "Proud Papa in Brown Shirt holding the Infant Christa" or of the bibliophile whose seemingly clean fingers stain his keyboard red after he peruses Century of Dishonor in a local bookstore.
Here the exhaust valve remains closed until the piston travels to bottom dead center.
To establish some velocity parameters with Blackhorn 209 in the Strike, I selected Precision Rifle's 260-grain Dead Center sabots, only because I had a lot on hand.
The sole purpose of the impulse, when properly engaged, is to keep the mag momentarily from rotating and firing the spark plug until the piston is a few degrees past dead center.
The Ikona tooth form is a patented non-involute profile consisting of a specifically matched external and internal tooth pair that provide maximum performance in the smallest size possible with no contact at top dead center.
Many great moments in American art have taken us into the heat of competition; generally speaking, however, art that references the world of sports finds its niche at the dead center of mainstream culture, churned out by schlock mills, marketed in "starving artist" sales at airport motels, or, worse yet, sold in "theme art" galleries that specialize in ripping off their clientele with dubious merchandise and hard sell about "investment potential.
nails had found its way dead center into my fishing rod.
At the corner of 18th Street, it's the dead center of Flatiron's Silicon Alley," Ellman says.
The Right has moved some crazy ideas from the fringe into the dead center of political debate because of its willingness to hammer away year after year.