| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a drill chuck having a clamping sleeve with a tapered basic shape such that a tapered basic shape can be easily realized with a metallic material while allowing easy modification of an inner circumferential surface.SOLUTION: A clamping sleeve (2) is made in two parts, i.e., a tapered metallic outer sleeve (10) and a tapered inner sleeve (11) that is made of resin. A centering ring portion (12) is provided on an inner circumferential surface of the outer sleeve (10) for radially centering the outer sleeve (10) to the inner sleeve (11).</p> |
