CHUCK

PROBLEM TO BE SOLVED: To provide a chuck for chucking a component so as to place a radial position of a free end part of the component in a fixed position; to provide a method for manufacturing components of a fuel injection valve by using the chuck. SOLUTION: The chuck 30 grips the columnar or cylindrical component 90 with two claws 10, 20. One claw 10 has a first contact holding part 11a, and the other claw 20 has two couples of second/third/fourth/fifth contact holding parts 21a, 21b, 22a, 22b. The second contact holding part 21a and the third contact holding part 21b occupy first positions identical in a component axial line direction 90c. The fourth contact holding part 22a and the fifth contact holding part 22b occupy second positions identical in the component axial line direction 90c. The first contact holding part 11a occupies an intermediate position between the first positions and the second positions in the component axial line direction 90c. COPYRIGHT: (C)2009,JPO&INPIT