Abstract: In an interface structure comprising a first assembly and a second assembly wherein the first assembly includes a cavity having a truncated cone-like section, a stop surface effective in the axial direction and a second assembly including a trunnion with a truncated cone-like section for abutment on the truncated cone-like sleeve section of the first assembly and an abutment surface for contacting the abutment surface of the first assembly, between the cavity and the trunnion a bayonet-like locking structure is provided in the interface structure whereby handling with a high repetition accuracy with regard to the position of the assemblies to be joined is ensured.

Abstract: In an interface arrangement between a first component group supporting a tool holder and a second component group supporting a machining element in a central opening for releasably accommodating the first component group, a shift lever element provided with engagement members is disposed rotatably on the second component group and provided with engagement and release elements for releasably retaining the first component group in the central opening of the second component group so as to permit a rapid exchange of the first component group by another group with a new tool.

Abstract: In an interface arrangement between a first component group supporting a tool holder and a second component group supporting a machining element having a recess for releasably accommodating the first component group, a lever element provided with engagement means is disposed rotatably on the second component group and provided with engagement and release means for releasably retaining the first component group in the recess of the second component group so as to permit a rapid exchange of the first component group by another group with a new tool.