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.

Abstract: A device for transmitting impulse-like blows to a continuously rotatable tool bit (6) is formed as an axially extending adapter (1) having a first chuck for the tool bit (6) and being insertable at a trailing end into a second tool bit chuck in a manually operated tool equipped with a striking mechanism. The adapter (1) has a housing (2) containing a unit for superimposing a second blow component on the first impulse blow component produced by the striking mechanism, so that an impulse-like drilling blow can be transmitted to the drill bit (6) made up of an axially directed blow component and a torsional blow component.

Abstract: A manually operable tool, such as a hammer drill, for drilling and/or removing material in at least one of brittle material and low ductile material, has a continuously rotatable chuck (8) and a motor driven striking mechanism (1) for transmitting impulse-like blows to a tool bit (9) held in the chuck (8). The tool includes members (5) for transmitting impulse-like blows composed of superimposed axially-directed blows and torsional blows to the tool bit (9) in the chuck for forming drilling blows. Further, an adaptor can be provided for attachment to the hammer drill containing the members (5) for affording the superimposed blows.

Abstract: A tool bit chuck for holding a bit (1) with axially extending grooves (2) closed at the ends thereof spaced apart in the axial direction. Latching elements (4) in the form of cylinders are radially displaceable into and out of the grooves (2). The latching elements (4) have an axis of rotation extending transversely of the axis of the receiving sleeve (3) in the chuck, whereby the latching elements (4) act as roll bodies in the event of an axial shift between the bit (1) and the receiving sleeve (3) so that friction which could result in premature wear, is prevented.

Abstract: A tool bit chuck for a bit (1) having axially extending latching grooves (2) closed at the opposite ends spaced apart in the axial direction, and axially extending rotary entrainment grooves (3) open at the trailing end of the bit. The chuck has entrainment elements (8) and radially displaceable latching elements (8). The latching elements (4) provide axially directed retention of the bit (1), while the entrainment elements (8) transmit torque to the bit (1). The entrainment elements are shaped as roll bodies, such as cylinders, to prevent wear caused by friction.