Abstract: The invention relates to a stop for arrangement on a drilling, milling or countersinking tool for machining a work piece, wherein the work piece has a surface, and wherein the drilling, milling or countersinking tool has a cutting section. The stop comprises a contact surface, wherein the contact surface is arranged such that once a predetermined machining depth in the work piece is reached, the contact surface is seated against the surface, at least in some sections. A connecting element is provided, wherein the connecting element is arranged between the contact surface and the cutting section. The connecting element is suited to prevent a relative movement between the contact surface and the surface.

Abstract: The invention relates to a stop for arrangement on a drilling, milling or countersinking tool for machining a work piece, wherein the work piece has a surface, and wherein the drilling, milling or countersinking tool has a cutting section. The stop comprises a contact surface, wherein the contact surface is arranged such that once a predetermined machining depth in the work piece is reached, the contact surface is seated against the surface, at least in some sections. A connecting element is provided, wherein the connecting element is arranged between the contact surface and the cutting section. The connecting element is suited to prevent a relative movement between the contact surface and the surface.

Abstract: The invention relates to an advancement guide unit (5) for ensuring the straight-line motion of a manually guided machine tool (I), particularly a portable drill, in the direction of advancement thereof and is substantially composed of a support element (12) for support on a work-piece to be treated and a carriage (30) guided displaceably on the support element (12) relative thereto in the direction of advancement for supporting and guiding the machine tool (1). According to the Invention, a damper (33) acting 48 in the direction of advancement is disposed between the support element (12) and the carriage (30), said damper damping the initial stroke of the carriage (30) toward the support element (12) over a predefined initial stroke distance (y). In a refinement, the damper (33) is disposed between the support element (12) and carriage (30) such that the damping of the initial stroke of the carriage (30) only commences after a primary, undamped initial stroke of the carriage (30).