universal chuck

American  

noun

1. a chuck, as on a lathe headstock, having three stepped jaws moving simultaneously for precise centering of a workpiece of any of a wide range of sizes.

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Etymology

Origin of universal chuck

First recorded in 1815–25

Example Sentences

The casting is held by three special hardened jaws b in a universal chuck.

From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.

The advantage of the universal chuck is that round and other parts of a uniform shape are located in a central position for turning without any adjustment.

From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Jones, Franklin D.

As you have, probably, economized as much as possible, a universal chuck is not available, hence the first experience will be with an independent chuck, where the three dogs move independently of each other.

From Practical Mechanics for Boys by Zerbe, James Slough

The work is held in a universal chuck, and if long is supported by a stay as shown in the figure.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

The strap should first be held in a universal chuck bolted to the face plate, or held in dogs such as shown in Fig.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua