CHUCK ARRANGEMENT AND METHOD FOR FASTENING AND ROTATING A WORKPIECE USING SUCH

摘要

Chuck arrangement (100) comprising at least three chuck jaws (110, 120, 130), each arranged to be radially displaceable into a respective clamping position in which it applies a radial clamping force (C) to a held workpiece (W). Each chuck jaw comprises fixing means. The chuck arrangement further comprises one respective counterweight (140, 150, 160) associated with each of said chuck jaw and mechanically connected to the chuck jaw in question so that the counterweight pulls the chuck jaw in a pull direction having a non-zero component radially towards a centre of rotation of the chuck arrangement as the chuck arrangement as it rotates. The invention is characterised in that each one of the said counterweights comprises at least one slot for a detachable weight. The invention also relates to a method.