Chuck

A chuck comprising a chuck body, clamping jaws displaceable in a radial direction relative to said chuck body, an actuating member movable in an axial direction relative to said chuck body and an arrangement for converting movement to bring about a radial adjusting movement of said clamping jaws in response to an axial adjusting movement of said actuating member, characterized in that each of said clamping jaws is connected with said chuck body via a pair of arms extending approximately in an axial direction, said arms being resiliently deflectable in a substantially radial direction and acting as a parallel spring link, and that said movement converting arrangement has for each clamping jaw a two-armed lever mounted for pivoting movement relative to said chuck body, an outer arm of said lever being in operative connection with an associated clamping jaw and an inner arm of said lever being in operative connection with said actuating member so as to bring about a pivoting movement of said lever about a pivot axis in response to an axial movement of said actuating member.