Runout


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runout

[′rən‚au̇t]
(hydrology)
The location where an avalanche slows down or stops, depositing the avalanche debris.
(metallurgy)
Escape of molten metal from a casting mold, crucible, or furnace.
Defect in a casting caused by escape of metal from a mold.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

runout

A branch pipe from a hot-water main to a convector.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Runout

(play), in machines and mechanisms, the departure of the surfaces of rotating or vibrating cylindrical parts from their proper relative positions.

Radial runout is the difference between the greatest (Amax) and least (Amin) distances from points on the actual surface to the reference axis of rotation in a section perpendicular to this axis (see Figure l); it results from eccentricity of such a section with respect to the axis of rotation.

Figare 1. Diagram of radial yunout

Figure 2. Diagram of end runout

End runout is the difference between the greatest and least distances from points on the actual end surface located around the circumference of a specified diameter (D) to a plane perpendicular to the reference axis of rotation (see Figure 2); it results from the nonperpendicularity of the end surface with respect to the reference axis and deviations of the end shape along the line of measurement.

Runout is a detrimental effect in machines and mechanisms; it tends to increase wear and failures in machine parts.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
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The results are more extensive deformation of these machine elements and greater shaft runout, also known as eccentricity.
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Effects of tip height and material type, radial clearance angle, and blade lateral runout of circular saws on the machined surface quality of medium-density fiberboards (MDF) cut by circular saws in terms of roughness height were investigated.
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