CHUCK DEVICE

摘要

PROBLEM TO BE SOLVED: To absorb misalignment by elastical holding of a workpiece with a cushioning member and to enhance the finishing accuracy and finished surface roughness thereof even in the case of a workpiece in which variations in concentricity between inner and outer circumferential surfaces of the workpiece cannot be avoided or under such working conditions that misalignment cannot be avoided between the axis of a working tool and the axis of the workpiece due to holding inaccuracy, etc., of the working tool by a chuck. SOLUTION: The cylindrical cushioning member 15 capable of elastically holding an outer circumferential surface of the cylindrical workpiece W is disposed on a chuck body 10 capable of holding/releasing the outer circumferential surface of the workpiece W.