Abstract: A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Abstract: A flange device and to a method for fastening a saw blade to a drive spindle of a sawing device. Among other things, the flange device includes a nut, which is arranged in a movable manner in an interior of a flange body, wherein, in a closed state of the flange device, the nut surrounds a central screwing device, which is guided in the drive spindle, for the purpose of fastening. A system for fastening a saw blade to a drive spindle of a sawing device, wherein the system has a flange device, and a sawing device and a central screwing device. The drive spindle of the sawing device can be pressed in the direction of the flange device by a spring, such that, in the closed state, it can be received by an interior of the nut of the flange device.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roll is disposed in a hood that is pivotable relative to the cutting plane.

Abstract: Wall saw having a locking device (41). A saw blade flange (25) of the wall saw is adjustable by the locking device (41) between a locked state and an unlocked state, wherein, in the locked state, the saw blade flange (25) is connected to the drive spindle (33) for rotation therewith, and, in the unlocked state, is adjustable in relation to the drive spindle (33). In the unlocked state of the saw blade flange, the drive spindle is blocked in the direction of rotation of the saw blade and is designed to be rotatable about the axis of rotation in a counter direction directed counter to the direction of rotation.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a receiving space in which the tool holder is disposed, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a side of the cutting plane where the ring saw blade is guidable by the guide roller from the side and where an outlet of a water flushing system is directed at the guide roller.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roll is disposed in a hood that is pivotable relative to the cutting plane.

Abstract: ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel where the ring saw blade is drivable in the cutting plane by the driving wheel and the driving wheel is coupled to the motor. The driving wheel is mounted in a bearing block so as to be rotatable about a drive axis perpendicular to the cutting plane. The bearing block is movable parallel to the cutting plane.

Abstract: A ring saw blade includes a flat annular support which has a side face and an outer circumference. One or more cutting elements are disposed along the outer circumference. An annular groove is recessed into the side face and has a radially inner flank and a radially outer flank. The radially inner flank is conical and a first cone describing the radially inner flank has a half opening angle of between 10 degrees and 30 degrees.

Abstract: A ring saw includes a ring saw blade, a tool holder that guides the ring saw blade in a cutting plane, a motor, and a driving wheel that drives the ring saw blade in the cutting plane and that is coupled to the motor. A guide roller is disposed on a first side of the cutting plane where the ring saw blade is guidable by the guide roller from the first side. A guide roll is disposed on a second side of the cutting plane where the ring saw blade is guidable by the guide roll from the second side. The guide roller is mounted such that the guide roller is freely rotatable about an axis of rotation where the axis of rotation slopes by 50 degrees to 80 degrees relative to the cutting plane.

Abstract: Wall saw having a locking device (41). A saw blade flange (25) of the wall saw is adjustable by the locking device (41) between a locked state and an unlocked state, wherein, in the locked state, the saw blade flange (25) is connected to the drive spindle (33) for rotation therewith, and, in the unlocked state, is adjustable in relation to the drive spindle (33). In the unlocked state of the saw blade flange, the drive spindle is blocked in the direction of rotation of the saw blade and is designed to be rotatable about the axis of rotation in a counter direction directed counter to the direction of rotation.

Abstract: An electric power tool for processing a substrate is disclosed. The electric power tool includes a tool which is designed to be rotatable around a rotational axis, a motor assembly having at least one motor which rotates the tool around the rotational axis, a motor housing having at least one receiving area for the at least one motor, a cooling element for cooling the at least one motor, and an electronic assembly having at least one electronic component to be cooled. The cooling of the at least one electronic component to be cooled is carried out via the motor housing.

Abstract: A machine tool, including a drive unit with a drive motor and a drive shaft that can be rotated around a drive axis of rotation by the drive motor in a forward direction as well as in a reverse direction opposite to the forward direction, a driven unit with a driven shaft that can be non-rotatably connected to a processing tool and that can be rotated in a direction of rotation around a driven axis of rotation, a planetary gear train arranged between the drive shaft and the driven shaft, including several components, whereby the drive shaft is non-rotatably coupled to a first planetary gear component, and including a device for switching between a first and a second transmission stage of the planetary gear train by changing the direction of rotation of the drive unit.

Abstract: A device (20) for adjusting the blade guard holder (17) arranged on the saw arm (3) of a wall saw (1), having a coupling element (25) is provided, whereby a first end of the coupling element (25) is joined to the blade guard holder (17), and, in a locked state, a second end is joined to the saw arm (3).

Abstract: A rail-guided power tool (1) has at least one carrying handle (24) and one device head (2) arranged on a guide carriage (12). The guide carriage (12) can be moved by an adjustment mechanism (23) from a locked position—in which the guide carriage (12) is engaged with a guide rail (9) via at least one adjustable guide roller (22)—into a released position—in which the at least one adjustable guide roller (22) is at a distance from the guide rail (9). The power tool (1) also has an unlocking mechanism (25) including an actuator (30), a transmitter (31) and an unlocking device (32), whereby the unlocking mechanism (25) is configured in one piece.

Abstract: An electric power tool for processing a substrate is disclosed. The electric power tool includes a tool which is designed to be rotatable around a rotational axis, a motor assembly having at least one motor which rotates the tool around the rotational axis, a motor housing having at least one receiving area for the at least one motor, a cooling element for cooling the at least one motor, and an electronic assembly having at least one electronic component to be cooled. The cooling of the at least one electronic component to be cooled is carried out via the motor housing.

Abstract: A device (20) for adjusting the blade guard holder (17) arranged on the saw arm (3) of a wall saw (1), having a coupling element (25) is provided, whereby a first end of the coupling element (25) is joined to the blade guard holder (17), and, in a locked state, a second end is joined to the saw arm (3).

Abstract: A rail-guided power tool (1) has at least one carrying handle (24) and one device head (2) arranged on a guide carriage (12). The guide carriage (12) can be moved by an adjustment mechanism (23) from a locked position—in which the guide carriage (12) is engaged with a guide rail (9) via at least one adjustable guide roller (22)—into a released position—in which the at least one adjustable guide roller (22) is at a distance from the guide rail (9). The power tool (1) also has an unlocking mechanism (25) including an actuator (30), a transmitter (31) and an unlocking device (32), whereby the unlocking mechanism (25) is configured in one piece.

Abstract: For the automatic determination of the diameter of a tool, particularly a saw blade for an automatic wall saw, which is driven by a motor via a gear unit, the moment of inertia of the tool is used as an indicator for its diameter. Three basic solution variants are introduced. In particular, the system including a motor, gear unit and tool is treated as a dual-mass oscillator such that the elasticity of the shafts and gears is arranged as a torsion spring between the inertial masses in two discrete points while taking into account two coefficients of friction including coefficients of the known inertia of the motor rotor (?R) and of the tool (?S). This system can be described by equations which are then simplified by reasonable assumptions or premises. The selected formulations are solved for the moment of inertia of the tool to determine the diameter therefrom and to make an optimal adjustment for the drive possible which is adapted to the respective tool.

Abstract: For the automatic determination of the diameter of a tool, particularly a saw blade for an automatic wall saw, which is driven by a motor via a gear unit, the moment of inertia of the tool is used as an indicator for its diameter. Three basic solution variants are introduced. In particular, the system including a motor, gear unit and tool is treated as a dual-mass oscillator such that the elasticity of the shafts and gears is arranged as a torsion spring between the inertial masses in two discrete points while taking into account two coefficients of friction including coefficients of the known inertia of the motor rotor (?R) and of the tool (?s). This system can be described by equations which are then simplified by reasonable assumptions or premises. The selected formulations are solved for the moment of inertia of the tool to determine the diameter therefrom and to make an optimal adjustment for the drive possible which is adapted to the respective tool.

Abstract: A saw for cutting hard materials, and including a guide rail (24) securable to a cut component, a support (13) displaceable along the guide rail (24), a saw head (1) including a drive for driving a saw blade, a guide element along which the saw head (1) is displaceable within predetermined limits and which is arranged on the support (13) and extends parallel to the drive shaft of the saw blade-driving drive and which extending transverse to a longitudinal extent of the guide rail (24) and transverse to the longitudinal extent of the guide rail (24), and a quick release device (5) provided between the support (13) and the saw head (1) for connecting the saw head (1) with the support (13).