Chuck arrangement and method for fastening and rotating a workpiece using such

A method for fastening and rotating a workpiece using a chuck arrangement, which chuck arrangement is associated with a radial direction, an axial direction and an angular direction about said axial direction, which method comprises the following steps:

• a) arranging the chuck arrangement into an assembled state, in which at least three chuck jaws of the chuck arrangement are radially dis placeable;
• b) radially displace said chuck jaws into said respective clamping position, in which respective clamping position each respective chuck jaw applies a radial clamping force onto the workpiece so that the workpiece is held by the chuck arrangement;
• c) radially fixing each of said chuck jaws in said clamping position using a chuck jaw fixing means;
• and
• d) rotating the chuck arrangement in the angular direction, about the axial direction,
• wherein the method further comprises, for each of said chuck jaws, providing a respective associated counterweight, each of which counterweights, in said assembled state, is mechanically connected to its associated chuck jaw in question and also associated with a respective centre of gravity which in turn, in said assembled state, is arranged so that the counterweight in question, via centripetal forces developed by the counterweight in question, pulls its associated 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 rotates in the angular direction in step d), wherein the method further comprises providing detach able weights to slots for such detachable weights arranged in each one of the said counterweights.