Abstract: In a hand power tool having a housing which at least in part comprises an inner housing and an outer housing, and in which the inner housing and the outer housing are spaced apart from one another, at least one damping element is provided between the inner housing and the outer housing, so that the inner housing and the outer housing are decoupled from one another.

Abstract: A manually operated electric machine tool for a disk-shaped rotating tool (18), having a machine housing (11) from which a drive spindle (12) for the tool (18) protrudes and on which a hollow cylindrical collar (15) is embodied coaxial to the drive spindle (12), and having a guard (20) that is detachably connected to the machine housing (11) and is designed to at least partially cover the tool (18), which guard can be mounted to and fixed in relation to the collar (15) by means of a clamp (23) with a clamping element (24). To set the guard (20) in desired rotation positions in relation to the machine housing (11) without using an auxiliary tool, and to secure the guard (20) in any rotation position, the clamp (23) is secured to the collar (15) in a rotating fashion and a manually releasable locking mechanism is provided between the clamp (23) and the collar (15) (FIG. 1).

Abstract: In a hand power tool, including a first housing part and a second housing part as well as a damping element between the first housing part and the second housing part, the damping element is connectable to the first housing part and the second housing part, wherein the first housing part and the second housing part are spaced apart from one another longitudinally of the hand power tool.

Abstract: An electrical machine has an armature with armature grooves for accommodating an armature winding and which is non-rotatably supported on an armature shaft, wherein at least one heat-conducting element is provided in the region of at least one end face of the armature.

Abstract: A stator for an electrical machine includes a flux return ring, a stator winding, and stator teeth located equidistantly along the flux return ring for accommodating the stator winding, wherein the flux return ring includes cooling elements.

Abstract: A spade drill bit (202) comprises a shaft (204) having one end (205) configured to be engaged to a driving tool and a cutting head (206) attached at an opposite end of said shaft (204). The cutting head (206) includes a center point (216) having threads (240) defined thereon, including continuous threads (247) adjacent the tip and discontinuous threads (242) thereafter toward the base.

Abstract: A hand-guided power jigsaw (10) with a jigsaw blade (33) which can be detachably clamped between the free ends of two essentially parallel arms (122, 222) preferably comprised of a U-shaped frame (22), in particular comprised of a tube, and which can be driven, in particular in a reciprocating manner, by a motor (11) integrated into the jigsaw (10), wherein a laterally protruding handle (13) with a switch button (15) of an on/off switch is disposed at the free end of one of the arms (221, 222), can be manufactured as lightweight, compact, and inexpensive because the lower arm (122) carries the motor (11) and transmission mechanism (114, 115, 116, 119, 67) for moving the saw blade (33) back and forth, particularly in a base housing (12), wherein a motor shaft (1103) with a crankshaft (116) is coupled parallel to the arm (221) and is coupled by means of a connecting rod (67) to an elastic support (51, 57) in order to clamp the jigsaw blade (33) in place.

Abstract: The invention relates to a tool receiving device for a machine tool (14), comprising an at least essentially disk-shaped hub (42), particularly for a hand-guided angle grinder (32) or a hand-held circular saw. Said tool receiving device also comprises a drive shaft (16) and a receiving device (12) comprising at least one catching element (20) which can be displaceably mounted against a spring element (18) in order to fix the machine tool in a positive fit in the direction of the periphery (50, 52). According to the invention, the drive shaft (16) comprises at least one shaped positive fit non chip-removing element (100) which is connected in a positive fit in the direction of the periphery (50, 52) to means for the transmission of drive torque in the receiving device (12).

Abstract: The present invention is directed to a method for shutting off a drive motor (12) of a power tool that drives a tool, the drive motor (12) being shut off as a function of a variable threshold value (E1) if the tool jams. It is provided that the threshold value (E1) is determined in at least one predetermined time interval (T1) as a function of a current load speed (n1) and a no-load speed (n0).

Abstract: The present invention is directed to an insertion tool (12) for an angle grinder (2) that has a hub (16) with at least a first fastening means for fastening the hub (16) to a driving device (22) of the angle grinder (2). It is provided that the first fastening means is located on a partial circle (54) with a radius (56) between 12 mm and 25 mm.

Abstract: The invention is based on an electric power tool, having an electric motor located in a housing (10) and having a cooling device (16, 18, 20, 30, 32). It is proposed that the cooling device (16, 18, 20, 30, 32), at least in some regions, has a cooling conduit (30) that is closed off from an interior of the housing (10).

Abstract: In an armature packet (1) for an electric motor, having a plurality of armature laminations (2, 3), in each of which a plurality of winding slots (4) for receiving an armature winding (5) are embodied, and the winding slots (4) of adjacent armature laminations (2, 3) are located in alignment with one another and form a conduit (6), a better positional fixation of the armature winding (5) is attained by providing that the winding slots (4), associated with one conduit (6), of different armature laminations (2, 3) have different geometries. The same is attained by providing that at least some of the winding slots (4) each have an influx conduit (11), each of which discharges into its region oriented toward the center of the armature packet (1).

Abstract: A gear mechanism, in particular for hand power tools, is disclosed which has a driving gear wheel (12), seated on a drive shaft (11) in the manner fixed against relative rotation, and a driven gear wheel (13), meshing with the driving gear wheel and driving a driven shaft (14). To attain high running smoothness of the gear mechanism and a longer service life by reducing the mechanical load on the gearing upon startup and in load peaks that occur during operation, spring-elastic damping elements (22) are located between the driven gear wheel (13) and the driven shaft (14) (FIG. 2).

Abstract: A portable power tool, in particular an angle grinder (10), includes a longitudinal housing (12) for accommodating a motor for driving a driven shaft (16) that is outwardly bent relative to the housing (12), the driven shaft being rotatably supported in a gearbox casing (14) and extending out of it with a free end that is provided to accommodate a sanding body. A protective cover (43) encompassing the sanding body is capable of being fastened on the gearbox casing (14) such that its rotation can be adjusted, and the rotational position of which is lockable using a notch lever (30). The device is made safer to operate and more cost effective to manufacture by the fact that the notch lever (30) is positioned transversely to the longitudinal axis of the angle grinder (10) and is pivotable around an axis (34) positioned substantially parallel to the housing (12).

Abstract: A spade drill bit (202) comprises a shaft (204) having one end (205) configured to be engaged to a driving tool and a cutting head (206) attached at an opposite end of said shaft (204). The cutting head (206) includes a center point (216) having threads (240) defined thereon, including continuous threads (247) adjacent the tip and discontinuous threads (242) thereafter toward the base.

Abstract: A vibration damping device has a rotation element connectable to a drive shaft in a frictional, nonpositive way and provided with at least one chamber filled with a material selected from the group consisting of a pourable material and a fluid material and capable of absorbing vibration energy.

Abstract: A manually operated electric machine tool for a disk-shaped rotating tool (18), having a machine housing (11) from which a drive spindle (12) for the tool (18) protrudes and on which a hollow cylindrical collar (15) is embodied coaxial to the drive spindle (12), and having a guard (20) that is detachably connected to the machine housing (11) and is designed to at least partially cover the tool (18), which guard can be mounted to and fixed in relation to the collar (15) by means of a clamp (23) with a clamping element (24). To set the guard (20) in desired rotation positions in relation to the machine housing (11) without using an auxiliary tool, and to secure the guard (20) in any rotation position, the clamp (23) is secured to the collar (15) in a rotating fashion and a manually releasable locking mechanism is provided between the clamp (23) and the collar (15) (FIG. 1).

Abstract: A portable power tool, in particular an angle grinder (10), with a longitudinal housing (12) for accommodating a motor for driving a driven shaft (16) that is U-bent relative to the housing (12), the driven shaft being rotatably supported in a gearbox casing (14) and extending out of it with a free end that is provided to accommodate a sanding body, whereby a protective cover (43) encompassing the sanding body is capable of being fastened on the gearbox casing (14) such that its rotation can be adjusted, and the rotational position of which is lockable using a notch lever (30), is made safer to operate and more cost effective to manufacture by the fact that the notch lever (30) is positioned transversely to the longitudinal axis of the angle grinder (10) and is pivotable around an axis (34) positioned substantially parallel to the housing (12).

Abstract: A drill is provided with a pair of spiral cutting blades having opposed cutting edges to come together at an angle to form a starting tip. Each of the spiral cutting blades includes a primary and a secondary flute which extends longitudinally thereof and is provided with cutting edge segments thereon, one flute being provided with an outer cutting edge segment and a second flute being provided with an inner cutting edge segment. The outer cutting edge segments of each cutting blade are in axial alignment with each other and the center point of the drill bit and perpendicular to an arcuate segment of the outer periphery of the drill.

Abstract: A masonry drill bit having an improved insert geometry, insert orientation, and interface clearance for providing improved drill speed and penetration rate. The drill bit is adapted for use in drilling masonry or other hard, brittle material. The drill bit has an axially elongated body with a leading front end portion and a rear end portion. The rear end portion is adapted to be held by a tool holder. The body has at least one spiral groove cast in its exterior surface substantially along its length. The insert is embedded in the leading end of the body, extending generally diametrically across the leading end of the body, and centered about a latitudinal plane of the insert. The geometric design of the insert, the orientation of the insert relative to the drill bit, and the interface clearance between the insert and the grooves, reduces friction and heat; resists wear, fractures, and abrasive actions of the chips; increases design life of the elements; and enhances debris elimination.