4″ 6-Jaw Self Centering Plain Back Lathe Chuck ~ .003″ T.I.R. ~ Made of high grade semi-steel. ~ Self centering jaws are hardened and precision ground. ~ Excellent for holding and machining thin walled workpieces. ~ 1 set of 3 M8 mounting screws are included. ~ Supplied with an adjusting wrench. ~ Maximum RPM is 4,200. ~ Internal clamping range is 2.0-30mm (.08-1.18″). ~ External clamping range is 30-80mm (1.18-3.15″). .003″ T.I.R. Made of high grade semi-steel. Self centering jaws are hardened and precision ground. Excellent for holding and machining thin walled workpieces. Center hole is 1.02″.
