Drill chuck

The utility model provides a drill chuck which comprises a rotary sleeve, a drill body, a nut, a clamping jaw, a gasket and a bearing ring, the nut is in threaded connection with the clamping jaw, the drill body is provided with an inclined clamping jaw hole for the clamping jaw to slide back and forth along the clamping jaw hole, the gasket is supported on a supporting step in the middle of the drill body, the bearing ring is placed on the gasket, and the nut is placed on the bearing ring; the bearing ring is characterized by comprising an annular steel ball groove sleeved outside the drill body, bearing steel balls are placed in the annular steel ball groove, and the depth of the annular steel ball groove is smaller than the diameter of the bearing steel balls. The gasket is simple in structure and very convenient to assemble, the annular steel ball groove can always contain the bearing steel balls, and the risk that the bearing steel balls fall off due to deformation of the gasket is avoided. 本实用新型提供了一种钻夹头