Drill chuck is blessing straight shank drill, proceed drilling a common fixture, mainly install on drilling machine spindle end, use three can all concentric move of jaw clamping drill bit or other tool holder. Drill can’t leave drill chuck, it is an important tool system of connected machine tool spindle and cutter. Because drill chuck quality makes a big difference for final processing result, so it is very important to choose what kind of drill chuck.
Drill chuck is made of drill jacket, elastic dial ring, connecting block, rear cover. In drill jacket, its axial positioning is to use the connection block to achieve, through the circumference of a circle to toggle jacks, under the influence of elastic dial ring internal thread axial moving, a precise automatic centering and clamping drilling rig, at work needs to be equipped with different drilling rigs (e.g., center drill, drill, reamer, tap, etc.) of the drill chuck, can loosen the set screw, turn the segment to the required location, fastening positioning screw, realize the drill chuck multistation move.
Drill chuck can be divided into handle tighten type, wrench type and self-tighten type, handle tighten type drill chuck and wrench type drill chuck clamp principle resemble, all through nut conical thread and clamping jaw column thread transmission to achieve clamp, and self-tighten type drill chuck clamp force root in connection and lead threaded rod screw thread pretensioner.