Abstract: The method of and a device for using this method, on equipment or assigned to equipment for working a material, for investigating and identifying the nature of the material, which is to be worked and for making available at least one operating parameter for the optimized pre-setting of the working equipment, provides for the use of a sensor, preferably assigned directly to the working tool, such as a hammer drill, in order to detect shock waves generated or induced in the tool. From the shock wave signal measured, at least one distinguishing feature characteristic of the material to be worked, is extracted and evaluated for the comparative classification of the material by means of an algorithm. Preferably, an external force, especially the contacting force, acting on the working equipment, is taken into consideration for the algorithmic evaluation.

Abstract: An electrical hand held tool including a percussion mechanism (2) with a striker (3) having a striking region (6), a chuck (4) for receiving a working tool (7); and an annular channel (8) provided in the striking region (6) of the striker (3); and having at least one side opening (9) communicating with the underpressure-producing ventilation system (5) of the electromotor of the hand-held tool.

Abstract: A twist drill bit (1) for use in rock has a helical land (7) arranged between a chuck insert end (2) and a tool head (3), and extends helically around a rotational axis (A) extending along a shaft (5).

Abstract: An electrical hand operated tool driving device (1), such as a hammer drill, a combination hammer or a chipping hammer, has an electropneumatic striking mechanism (2), for which a cooling medium (8), for cooling the striking mechanism (2), flows through a liquid-tight cooling medium duct (10, 11, 12, 13), which is disposed in a housing (7) of the tool driving device (1).

Abstract: An electrical hand operated tool driving device (1) for producing an at least partially impacting movement of a tool (11) with an air striking mechanism (2) and a no-load stroke disconnection, which scans the no-load stroke position (9) by a sensor (14) and evaluates it with an assigned control unit (15), and in the event of a no-load stroke, lowers the rpm of an energizing driving mechanism (3) over the control unit (15) to a previously fixed reduced rpm.

Abstract: An electrical device for driving a tool (1), is secured in a tool chuck (2) and contains data (6) characterizing the tool (1). The tool is driven by an electrical driving mechanism (10), and is equipped in the chucking region (4) with a transponder (5), which contains READ and/or WRITE data (6). The electrical device (3) contains a transmitting and receiving unit (7), connected with a microcontroller (8), which in turn is connected with the electrical driving mechanism (10).

Abstract: A depth assembly for use wit a hand-held power tool (2) comprising a rod-shaped, deflection-resistant, depth-setting member (3) supported for a limited movement parallel to an axis of the power tool; a motorized control unit (5) associated with the depth-setting member (3) and connectable with an energy source (4); a length-determining sensor (10) associated with the depth-setting member (3); a transceiver unit (7) for contactless reading of an identification of a fastening element (9) insertable in the blind bore formed with the hand held power tool, and a micro-controller (6) for controlling the operation of the control module (5) and connected with the transceiver unit and the sensor.

Abstract: An electric hand tool apparatus (1) for driving a drill-like tool, which carries out an at least partial rotational movement, has within a housing (2), an electric motor (4) without or free of collector and slip ring, the rpm of which can be controlled by motor control electronics (3), wherein an rpm-dependent clutch (5) for transferring the torque is disposed in a force transfer path from the electric motor (4) to a transmission (6). Optionally, to prevent an excessively high twisting of the housing (2), a sensor (7) is evaluated and the rpm of the electric motor (4) is reduced in order to sever the transfer of force by the rpm-dependent clutch (5).

Abstract: An electrical hand-held tool for producing at least a percussion movement of a working tool and including an electrical drive, a first subassembly including a percussion mechanism (2) and a rotor (5) of the electrical drive and rotatable about a rotor axis (B) extending parallel to an oscillation path (I) of the first subassembly, and a second subassembly including a housing (6) in which the first subassembly is supported for a limited movement along a tool axis (A).

Abstract: A tool for effecting drilling and/or chiseling and including a tubular shaft (2, 22) having an axially extending through-channel (8, 28) and provided, at one of its axial ends, with a drilling or chiseling head (5), and a connection member (3, 23) connected with another of axial ends of the shaft and provided at its end remote from the shaft (2, 22) with a shank (4, 24), the through-channel (8, 28) being connected with the tool circumference by a cross-bore (7, 27), and the largest cross-sectional surface (A1, A4) of the connection member (3, 23) corresponding at least to 2.5 times of the largest cross-sectional surface of the shank (4, 24).

Abstract: A tool for effecting drilling and/or chiseling and including a tubular shaft (2) provided, at its one axial end, with a cutting head (5), and a connection member (3) provided at another axial end of the shaft (2) and equipped with a shank (4), with the connection member (3) having a cross-bore (7) opening into the through-channel (8) formed in the shaft (2) and, with the connection member having, along a substantial portion of its axial extent, a diameter (d1) that at most corresponds to 1.6 of a diameter (d2) of the shank (4).

Abstract: A tool for drilling and/or chiseling for use with a hand-held mechanized tool having a suction device (10) including a housing (11) surrounding the tool (1), with the tool (1) including a tubular shaft (2) and a connection member (3) located opposite a front end of the shaft (2) for connecting the shaft (2) with the housing (11) of the suction device (10) and having a diameter larger than a diameter of the shaft (2), and with the connection member (3) being formed of a core (5) surrounding the shaft (2), and an adapter (6) surrounding the connection member core (5) and having a cross-bore (7) opening into the through-channel (8) formed in the shaft (2).

Abstract: Equipment for working a hard material includes a housing (2), a driving motor (1), located within the housing, a cooling duct (3) within the housing surrounding the driving motor, a tool (5) for working the hard material connected to the driving motor and at least one electronic component (19) mounted on a cooling device (8). A coolant supply source (6) supplies coolant under pressure to the cooling device (8) and then to an upstream end of the cooling duct (3). A first coolant discharge pipeline (13) is connected to a downstream end of the cooling duct (3). The first coolant discharge pipeline (13) flows the coolant into a reversible distributor (10).

Abstract: A drill for forming bores in constructional components, and including a sleeve-shaped stem (2; 12; 22; 32; 42; 52) having an axially-extending through-bore (3; 13; 23; 33; 43; 53) which opens into mouth openings (7; 10; 14; 24; 34; 44; 54) formed in opposite end sections of the stem (2; 12; 2; 32; 42; 52); a shank (5) provided at a rear end of the stem, and a drilling head (8; 15; 25; 35; 45; 55) formed of a hard material and secured in at least one slot (19; 29; 49; 59) formed in a free front end of the stem (2; 12; 22; 32; 42; 52), with a section of the drilling head (8; 15; 25; 32; 45; 55), which is embedded in the stem (2; 12; 22; 32; 42; 52), flatly engaging a material of the stem (2; 12; 22; 32; 42; 52) and being fixedly connected with the stem material.

Abstract: A tool for hand-held equipment and including a shank (2; 22; 32) with a clamping region (3; 23; 33) having a diameter (t) equal to or greater than 12 mm, at least one locking groove (4; 24; 34) provided in the clamping region (3; 23, 33), and at least one drive groove (6; 26; 36) provided in the clamping region (3; 23; 33), with the at least one locking groove (4; 24; 34) and the at least one drive groove (6; 26; 36) having each a depth (v; d) equal to or greater than 2.5 mm and opposite edges (8; 9) lying on a shank circumference, and forming with each other, an aperture angle (&agr;; &bgr;) equal to or greater than 50°.

Abstract: A drilling and/or chiseling tool is formed basically by a shaping without cutting procedure and has a axially extending shaft (1) with at least three helical drilled material removal grooves (2). The shaft (1) has a shank (3) at its trailing end in the drilling direction, and at the opposite end, leading in the drilling direction is a drilling head (6). The drilling head (6) has a recess for holding a hard metal insert (8). Because of the number of removal grooves (2), the course of the grooves is approximately parallel to the shaft axis, whereby in the drilling head (6) region there is adequate material for laterally supporting the hard metal insert (8). Accordingly, an expensive correction of the shape of the removal grooves (2) in the region of the drilling head (6) can be avoided.

Abstract: A drill for forming bores in constructional components and including a tubular stem (2; 22; 32; 42) having an axially extending through-channel (3; 23; 33; 43) which opens into at least one suction opening (7; 11; 27; 37; 47), a shank (5) provided at a rear end of the stem for connecting the drill to a drilling tool (M), and a drilling head (8; 28; 38; 48) having lips (9; 29; 39; 49) and formed entirely of a cutting material and substantially butt-joined to the stem (2; 22; 32; 42) at a free front end of the stem (2; 22; 32; 42), with at least one suction opening being formed by a mouth opening of a front channel (12; 26; 36; 46) which is limited, at least partially by a material of the drilling head (8; 28; 38; 48) and a mouth surface of which, at least partially is arranged in a circumferential region of at least one of the stem (2; 22; 32; 42) and the drilling head (8; 28; 38; 48).

Abstract: A drilling tool has a shank (1) at one end, a shaft (2) with two helical grooves (5, 6) and the shaft (2) extends from the shank to the other end of the drilling tool. A drill head (8), with a cutting plate (7) inserted in it, is located at the opposite end of the shaft (2) from the shank (1). The cutting plate (7) has a cutting tip (74) projecting axially outwardly from the drill head (8). The cutting plate has a dimension (B) extending perpendicularly to the axis of the drilling tool and the dimension (B) is greater than the diameter of the drill head (8). On the opposite sides of the cutting plate (7) there is a reinforcement section (71) projecting outwardly from the side of the cutting plate and spaced laterally from the ends of the grooves (5, 6) in the drill head.

Abstract: A tool for drilling and/or chiselling has an axially extending guide tube (9) with at least one radially extending air passage (10) and a control body for selectively closing the air passage. The control body has the stop (30) interacting with a first stop shoulder (18) on a driving anvil (17). The control body can be displaced relative to the guide tube (9) opposite to the working direction of the tool against the biasing action of a spring (12) supported on a connecting sleeve (13) of the control body. The driving anvil (17) has a second stop shoulder (19) facing opposite to the working direction and interacting with a stop surface (20) facing in the working direction. The stop surface (20) is secured axially with the guide tube (9).

Abstract: A tool for drilling and/or chiseling has a striking mechanism (6) within a guide tube (9) for reciprocating a first piston (7) and, via an air cushion, for reciprocating a second piston (19) within the guide tube. The second piston drives a driving anvil (17) in the driving direction. Between the first and second pistons (7, 19) the guide tube (9) has a series of radially extending first air passages (10) arranged in a first plane (E1) extending perpendicularly of the driving direction. A control body can be shifted over the guide tube (9) and is connected to the driving anvil (17). The guide tube (9) has a second series of radially extending second air passages (11) therethrough arranged in a second plane (E2) spaced from the first plane (E1) at a distance (A) opposite to the driving direction.