Big Tree Tools, LLC

Jon Siegel

Grinnell More

A drive center constituting a machine tool accessory being used on a lathe for holding workpieces that are mounted between the headstock and the tailstock (between centers). The drive center includes a head having an adjustable spring-loaded center point and a number of removable, adjustable spurs that are capable of penetrating a workpiece sufficiently to provide torque for the turning process. The head is attached to a shank with a standard taper to fit the spindle of a lathe. A cylindrical guard is supported coaxially by the external surface of the head so that the guard radially encircles the head and the spurs but is able to slide axially and rotationally with respect to the head. A spring causes the guard to extend axially beyond the spurs except when pushed back by the workpiece.

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Wilmot, NH, United States of America

Jon Siegel