Provided is ram clamping system (100) comprising a rotationally symmetrical main body (110), which has an opening that passes through the rotationally symmetrical main body (110) along its axis of symmetry, in which opening a drawbar (140) extends, comprising a collet (120) which can be clamped by means of the drawbar (140) for fixing a ram (190) associated with the ram clamping system (100), and comprising an exchangeable holder (180), through the interior (181) of which the ram (190) passes before entering the collet (120), wherein at least one portion of the collet (120) projects in the direction of extension of the drawbar (140) beyond the end face of the main body (110), on which end face the exchangeable holder (180) is arranged, and enters the interior (181) of the exchangeable holder (180).

A chuck assembly for a rotary power tool includes a chuck body rotatable about a central axis. The chuck body has a plurality of slots, each oriented at an oblique angle relative to the central axis. The chuck assembly also includes a plurality of jaws, each movable along a respective one of the slots. The chuck assembly also includes a collar coupled to the plurality of jaws. The collar is selectively engageable with the chuck body such that, when engaged, the plurality of jaws are movable along the plurality of slots in response to rotation of the collar.