Abstract: In a device for limiting the advance during a drilling operation, which can be used in conjunction with a hand drill or with an automatic manufacturing machine, the device comprising a housing with a stop cage and a spindle mounted rotatably and axially displaceably in the housing, and a stop which is adjustable in the axial direction being arranged for limiting the advance, the invention consists in that the stop cage (2a) comprises a pin fixed to the housing for breaking the chips, with a housing-side end and a free end, in such a way that it extends approximately parallel and directly adjacent to the workpiece surface and approximately radially from the outside towards the drilling tool in such a way that its free end almost touches the countersink. Damage to the surface of workpieces is prevented by the invention, so that corresponding refinishing is avoided. Moreover, the removal of the coiled chips from the drilling tool previously necessary after each drilling cycle is dispensed with.

Abstract: In order to improve a device for a drilling machine in such a way that manual drilling can be carried out with optimum conditions, it is proposed that the device include a workpiece jigging device, a guide device for the guidance of the machine when there is a displacement of the workpiece jigging device, and a control device for the control of the feed displacement of the workpiece jigging device and the machine. The control device has combinations of impact dampers and/or springs to achieve control over the feed displacement.

Abstract: In a device for limiting the advance during a drilling operation, which can be used in conjunction with a hand drill or with an automatic manufacturing machine, the device comprising a housing with a stop cage and a spindle mounted rotatably and axially displaceably in the housing, and a stop which is adjustable in the axial direction being arranged for limiting the advance, the invention consists in that the stop cage (2a) comprises a pin fixed to the housing for breaking the chips, with a housing-side end and a free end, in such a way that it extends approximately parallel and directly adjacent to the workpiece surface and approximately radially from the outside towards the drilling tool in such a way that its free end almost touches the countersink. Damage to the surface of workpieces is prevented by the invention, so that corresponding refinishing is avoided. Moreover, the removal of the coiled chips from the drilling tool previously necessary after each drilling cycle is dispensed with.

Abstract: In order to improve a device for a drilling machine in such a way that manual drilling can be carried out with optimum conditions, it is proposed that the device include a workpiece jigging device, a guide device for the guidance of the machine when there is a displacement of the workpiece jigging device, and a control device for the control of the feed displacement of the workpiece jigging device and the machine. The control device has combinations of impact dampers and/or springs to achieve control over the feed displacement.

Abstract: In order to improve a device (100) for a drilling machine (10) known per se for manual drilling with a casing (11), a grip (12), a tool chuck (13) and a tool (14), especially a drilling, reaming or counterboring tool, in such a way that manual drilling can be carried out with optimum conditions, it is proposed that the device comprises a workpiece jigging device (15) with at least one contact face and a guide device (21) for the parallel guidance of the tool (14) and/or of the casing (11) when there is a displacement of the workpiece jigging device (15) relative to the casing (11), said displacement being coaxial with a machine axis and/or tool axis, and a suction-type extraction device (18) for conveying away and sucking away material chips, dusts and impurities from the area of the workpiece jigging device (15), or more precisely the machining point and a control device (27) for the control of the feed motion between the workpiece jigging device (15) and the casing (11), said control being active at leas

Abstract: In order to improve a device (100) for a drilling machine (10) known per se for manual drilling with a casing (11), a grip (12), a tool chuck (13) and a tool (14), especially a drilling, reaming or counterboring tool, in such a way that manual drilling can be carried out with optimum conditions, it is proposed that the device comprises a