Drill Chuck

An accessory for holding tools with a plain cylindrical shank such as drills, taps, or the like, by means of two or more internal selfcentering (universal) jaws. It may be attached directly to the spindle of a machine, arbor, shaft, hand mechanism, or the like without the use of centers. The jaws are simultaneously adjusted by an adjusting nut, sleeve, feed screw, or the like. The rated capacity of this item is one (1) inch (25.4 mm) diameter. For universal chucks having a capacity in excess of one (1) inch (25.4 mm), see chuck, universal jaw. Excludes chuck, centering, lathe.