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.

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.

runout

A branch pipe from a hot-water main to a convector.
References in periodicals archive ?
I'm not sure a lot of the new boys signed up for a Wednesday night at Shielfield Park when they joined Rangers but they seemed to enjoy their runout.
Even at relatively strong shaft runout, the seal lip securely abuts the shaft.
Caption: Bullet runout is a measurement of how straight the bullet is in the cartridge case.
The surface roughness height of a machined piece is influenced by various factors, such as radial clearance angle, tip lateral runout, tip height, and tip material type.
Because of its repeating nature, runout waveforms can be decomposed into individual harmonics using Fourier analysis.
Runout can be checked by installing a rod in the drill chuck and then placing a dial indicator against the rod and turning the chuck by hand.
Runouts offer a fluid indication of water dynamics.
The series offers a positional accuracy of 2 pm, straightness/flatness runout of +/-5 pm for 100 mm of travel and +/-10 pm for 200 mm of travel with repeatability of +/-0.
The mechanics of a normal runout are straightforward.
The runout is a very practical and directly measurable parameter, which is defined as the movement of the surface of a rotating object in relation to a fixed datum.
f] gives a possibility to set position of the bottom runout origin with respect to bending plane by the value of [z.
The Laser Microgage system and additional receivers are tailored for lathe and spindle alignment, checking machine tool runout, roll and web alignment, and precision bore alignment.