dead center

state in which there is total balance within a mechanism; condition in which there is no movement; exact center

A lathe center (or center) is a tool that has been ground to an included angle of 60 ° and is used to accurately position a workpiece about its axis.The primary use of a center in metalworking is to ensure concentric work is produced, this allows the workpiece to be transferred between operations without any loss of accuracy. A part may be turned in a lathe, sent off for hardening and tempering and then ground between centers in a cylindrical grinder. The preservation of concentricity between the turning and grinding operations is crucial for quality work. A center is also used to support longer work pieces where the cutting forces would deflect the work excessively, reducing the finish and accuracy of the workpiece, or creating a hazardous situation.
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Noun
1. the position of a crank when it is in line with the connecting rod and not exerting torque
(synonym) dead centre
(hypernym) position, spatial relation

exact middle He was able to hit the target dead center.

dead center
ngay chính giữa
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