Chuck (engineering)
SPECIALIZED TYPE OF CLAMP TO HOLD A ROTATING TOOL OR WORKPIECE
Pin chuck; Four-jaw chuck; Three-jaw chuck; Scroll chuck; Independent-jaw chuck; Arthur I. Jacobs; Lathe chuck; Chuck key; Drill chuck; Tool chuck; Scroll plate; Self-centering chuck; Scroll gear; Special Direct System
A chuck is a specialized type of clamp used to hold an object with radial symmetry, especially a cylinder. In a drill, a mill and a transmission, a chuck holds the rotating tool; in a lathe, it holds the rotating workpiece.