A power tool with a rotatable tool designed as a saw blade or a milling cutter. The power tool includes a sensor device for detecting a mechanical quantity, the mechanical quantity including a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress. The mechanical quantity is dependent on a force emanating from the tool, and a control device communicatively coupled to the sensor device. The control device is adapted to recognize a kickback event based on the detected mechanical quantity, in which the control device is adapted to selectively determine a first recognition function or a second recognition function different from the first recognition function based on a function determination information, and to perform the recognition of the kickback event based on the detected mechanical quantity using the determined recognition function.

An electric power tool is configured to drive a tool bit. The electric power tool includes a motor that includes a stator and a rotor. The stator includes a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator. The rotor is rotatable with respect to the stator. The rotor includes a rotor core and a rotation shaft. The first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.

An electric power tool is configured to drive a tool bit. The electric power tool includes a motor that includes a stator and a rotor. The stator includes a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator. The rotor is rotatable with respect to the stator. The rotor includes a rotor core and a rotation shaft. The first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.

An electric working machine of an example of the present disclosure includes: a motor; a power supply portion; a controller; and a voltage detector. The power supply portion generates a DC voltage to drive the motor by rectifying an AC voltage supplied from an AC power source and smoothing by a capacitor. The controller controls energization of the motor. The voltage detector detects the AC voltage. The controller is configured to interrupt the energization when the voltage detector does not detect the AC voltage.

An electric working machine of an example of the present disclosure includes: a motor; a power supply portion; a controller; and a voltage detector. The power supply portion generates a DC voltage to drive the motor by rectifying an AC voltage supplied from an AC power source and smoothing by a capacitor. The controller controls energization of the motor. The voltage detector detects the AC voltage. The controller is configured to interrupt the energization when the voltage detector does not detect the AC voltage.

A portable zero clearance circular saw including a motor frame portion with a transverse oriented drive shaft and arbor coupled to the drive shaft, a handle portion with a hand grip coupled to the motor frame portion aft end, a planar blade deck on a first lateral side, a movable blade shield rotatably mounted coaxial with the drive shaft and having a sidewall with a edge face coplanar with the blade deck, a trigger proximate the hand grip to move the blade shield, and a blade couplable to the drive shaft against the arbor, such that the blade outer surface is flush with the blade deck and blade shield sidewall. The handle portion may be rotatably coupled to the motor frame portion, and may include two laterally disposed blade shield triggers operably coupled to the blade shield via a dual pulley system.

A portable zero clearance circular saw including a motor frame portion with a transverse oriented drive shaft and arbor coupled to the drive shaft, a handle portion with a hand grip coupled to the motor frame portion aft end, a planar blade deck on a first lateral side, a movable blade shield rotatably mounted coaxial with the drive shaft and having a sidewall with a edge face coplanar with the blade deck, a trigger proximate the hand grip to move the blade shield, and a blade couplable to the drive shaft against the arbor, such that the blade outer surface is flush with the blade deck and blade shield sidewall. The handle portion may be rotatably coupled to the motor frame portion, and may include two laterally disposed blade shield triggers operably coupled to the blade shield via a dual pulley system.

An electric circular saw includes a saw blade, a drive assembly, a housing, and a base plate. The drive assembly is used for driving the saw blade to rotate around a first axis. The electric circular saw further includes a dust-blowing structure. The dust-blowing structure includes a wind-blowing assembly disposed on the drive assembly, a dust-blowing portion disposed on the base plate and a wind guide portion disposed between the dust-blowing portion and the wind-blowing assembly. The dust-blowing portion includes a flow guide hole and a flow guide groove disposed on the base plate. The flow guide hole is a through hole extending through the base plate. The flow guide groove is a groove disposed on the lower side of the base plate. The flow guide hole communicates with the flow guide groove.

An electric circular saw includes a saw blade, a drive assembly, a housing, and a base plate. The drive assembly is used for driving the saw blade to rotate around a first axis. The electric circular saw further includes a dust-blowing structure. The dust-blowing structure includes a wind-blowing assembly disposed on the drive assembly, a dust-blowing portion disposed on the base plate and a wind guide portion disposed between the dust-blowing portion and the wind-blowing assembly. The dust-blowing portion includes a flow guide hole and a flow guide groove disposed on the base plate. The flow guide hole is a through hole extending through the base plate. The flow guide groove is a groove disposed on the lower side of the base plate. The flow guide hole communicates with the flow guide groove.

Apparatus is provided for a medical cutting device, specifically, a cast removal apparatus designed for the removal of orthopedic casts generally applied for immobilization, which apparatus comprises a temperature safety system and/or a burn reduction system. The use of any saw for cast removal creates a potential for patient discomfort and iatrogenic injury, including but not limited to burns which can leave unsightly scars and wound complications. The apparatuses presented comprise a housing for a temperature control system and motor, which motor can be controlled by the temperature control system to control a cast saw blade, with at least one temperature sensor to sense temperature information regarding at least one cutting region of the blade. The temperature information is used by the temperature control system to control the motor. The apparatuses presented comprise a burn reduction system with cast saw blade coolant or lubricant and coolant or lubricant applicators.