live centre

British  

/ laɪv /

noun

1. a conically pointed rod mounted in the headstock of a lathe that locates and turns with the workpiece Compare dead centre

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Example Sentences

The spindle journals must, to produce truly cylindrical work, be cylindrically true, or otherwise the axis of its revolution will change as it revolves, and this change will be communicated through the live centre to the work, or through the chuck plate to the work, as the case may be.

From Project Gutenberg

The first of these strains is caused by the carrier being driven at a leverage to the work, as shown at a in the figure, which causes the live centre to act as a fulcrum, from which the work may be bent by the strain caused by the cut.

From Project Gutenberg

The objection to this is, first, that either the live centre must be very short, or the arm b must be very long; and, second, if the chuck wears out of true, it carries the live centre also out of true; hence this class of driver is but little used, even in foot lathes.

From Project Gutenberg

It consists of two jaws a, a held together by two screws, and threaded to receive two driving screws d, e in the figure, which enable it to be used to hold work to the live centre as is necessary when using the steady rest, as is shown in the figure, in which b represents the work and c the jaws of the steady rest.

From Project Gutenberg

It is obvious that the dog may be thus employed to chuck work independently of the steady rest, because the live centre may be removed, and the face of the work held against the face of the chuck, the short screws h being used instead of the long ones d, e.

From Project Gutenberg