Abstract: An electric tool system includes a fastening unit, a sensor unit, a torque calculator, an input unit, a comparison processor, and a correction processor. The fastening unit fastens a work target onto a specified member with driving force generated by a power source. The sensor unit detects a physical quantity corresponding to fastening torque with which the fastening unit fastens the work target. The torque calculator calculates a torque measured value by applying a result of detection of the physical quantity by the sensor unit to a calculating method. The input unit accepts entry of a torque true value. The comparison processor compares the torque measured value with the torque true value. The correction processor makes, based on a result of comparison made by the comparison processor, correction to the calculating method to make a difference between the torque measured value and the torque true value equal to or less than a predetermined threshold value.

Abstract: An electric tool includes a fastening unit, a control unit, a sensor unit, a communications unit, a storage unit, and a portable tool body. The sensor unit measures at least fastening torque applied by the fastening unit. The communications unit transmits operations data about a result of measurement made by the sensor unit. The communications unit includes a wireless communications unit and a wired communications unit. In a wireless communication mode, the wireless communications unit transmits, by a wireless communication method, at least a part of the operations data, when a fastening operation has been done for either one round or multiple rounds. In a wired communication mode, while the communications unit is operating in the wired communication mode, the wired communications unit transmits, by a wired communication method, the operations data stored in the storage unit.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: An impact rotary tool includes a motor, a hammer, an anvil, a sensor, a circuit board, and an isolator. The hammer is configured to receive rotational force around an axis from the motor and output striking rotational force which is obtained by converting part of the rotational force into striking force around the axis. The anvil to which a tip tool is to be attached is configured to rotate, together with the tip tool, around the axis in response to the striking rotational force received from the hammer. The sensor is disposed in a vicinity of the anvil and is configured to sense a change in a state of the anvil, the change being according to the striking rotational force. The circuit board is configured to receive a sensing result by the sensor. The isolator isolates contact portions of the hammer and the anvil from at least the circuit board.

Abstract: An impact tool includes a motor, an output block, a hammer, and a magnetostrictive sensor. The magnetostrictive sensor includes a magnetostrictive member and a coil portion covering the magnetostrictive member. The output block includes a claw block and a body block. The claw block includes an anvil claw, against which a hammer claw collides. The claw block has been subjected to quenching treatment. The body block includes a thermally sprayed portion and is coupled to the claw block. The thermally sprayed portion includes, on a surface thereof, the magnetostrictive member made of a magnetostrictive material.

Abstract: An impact rotary tool includes a motor, a hammer, an anvil, a sensor, a circuit board, and an isolator. The hammer is configured to receive rotational force around an axis from the motor and output striking rotational force which is obtained by converting part of the rotational force into striking force around the axis. The anvil to which a tip tool is to be attached is configured to rotate, together with the tip tool, around the axis in response to the striking rotational force received from the hammer. The sensor is disposed in a vicinity of the anvil and is configured to sense a change in a state of the anvil, the change being according to the striking rotational force. The circuit board is configured to receive a sensing result by the sensor. The isolator isolates contact portions of the hammer and the anvil from at least the circuit board.

Abstract: An electric power tool includes a bearing retainer that retains a bearing for supporting a motor shaft, a transmission mechanism that transmits a rotational output of a motor to a front-end tool and a rotating body attached to an end of the motor shaft. The bearing retainer includes an extension that extends in a direction of axial line from an end face position on the bearing. At least a part of the rotating body is provided in front of a rear end of the extension.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled, amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a trigger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: A power tool that is capable of more reliably keeping a torque at a constant is provided. An adjustment member is provided with: an engagement hole that is detachably attached to the adjustment member, and serves as an engagement part that engages with a torque adjustment device that serves as a clutch handle for rotating the adjustment member; and a lid that is attached to an opening in such a manner as to cover the engagement hole.

Abstract: An electric power tool includes a bearing retainer that retains a bearing for supporting a motor shaft, a transmission mechanism that transmits a rotational output of a motor to a front-end tool and a rotating body attached to an end of the motor shaft. The bearing retainer includes an extension that extends in a direction of axial line from an end face position on the bearing. At least a part of the rotating body is provided in front of a rear end of the extension.

Abstract: A tip tool holder includes a nail portion to be inserted in an attachment hole formed in a power tool, an accommodation portion capable of accommodating a tip tool, and an opening opposite to the nail portion. The accommodation portion accommodates the tip tool such that an axis of the tip tool is substantially perpendicular to a direction in which the nail portion and the opening face each other. The tip tool holder includes a first arm and a second arm opposite to each other. The opening is included in the first arm while the nail portion is provided to the second arm.

Abstract: A power tool includes a motor, a drive unit driven by the motor, and a trigger switch and a forward-reverse switch each operable by a user. The trigger switch is switchable between an activation state and a deactivation state. The forward-reverse switch switches a motor rotation between forward and reverse. The power tool also includes a control unit that drives the motor based on operation of the trigger switch and allows switching of an operation mode of the power tool between first and second modes. In the first mode, the motor rotation is switched to that selected by the forward-reverse switch. In the second mode, when the activation state is switched to the deactivation state, the motor rotation is switched so that the motor is driven in a direction opposite to the present rotation direction when the trigger switch is activated next.

Abstract: An electric power tool includes a motor, an output shaft, a drive force transmission configured to reduce drive speed of the motor and transmit drive force of the motor to the output shaft; a triqger that can be pulled by a user; a rotation speed changing circuitry configured to change a rotation speed of the output shaft that corresponds to a maximum pulled amount of the trigger to a limited rotation speed that is lower than a maximum rotation speed of the output shaft in a non-limited rotation speed mode; and a rotation speed control circuitry configured to control a rotation speed of the motor in correspondence with a pulled, amount of the trigger to obtain the rotation speed of the output shaft that is changed by the rotation speed changing circuitry.

Abstract: An electric power tool includes a motor having a drive shaft, a tool output shaft rotated by rotational force of the drive shaft, a clutch unit that connects or disconnects a torque transmission line between the drive shaft and the tool output shaft according to load torque of the tool output shaft, a load detector that outputs a load torque signal in accordance with the load torque of the tool output shaft, and a control unit that performs a rising detection mode, which detects rising of the load torque signal to stop rotation of the motor, and a falling detection mode, which detects falling of the load torque signal to stop rotation of the motor. The control unit selects the rising detection mode or the falling detection mode according to a usage condition signal indicating a usage condition of the electric power tool.

Abstract: A power tool includes a motor, a drive unit driven by the motor, and a trigger switch and a forward-reverse switch each operable by a user. The trigger switch is switchable between an activation state and a deactivation state. The forward-reverse switch switches a motor rotation between forward and reverse. The power tool also includes a control unit that drives the motor based on operation of the trigger switch and allows switching of an operation mode of the power tool between first and second modes. In the first mode, the motor rotation is switched to that selected by the forward-reverse switch. In the second mode, when the activation state is switched to the deactivation state, the motor rotation is switched so that the motor is driven in a direction opposite to the present rotation direction when the trigger switch is activated next.

Abstract: A power tool that is capable of more reliably keeping a torque at a constant is provided. An adjustment member is provided with: an engagement hole that is detachably attached to the adjustment member, and serves as an engagement part that engages with a torque adjustment device that serves as a clutch handle for rotating the adjustment member; and a lid that is attached to an opening in such a manner as to cover the engagement hole.

Abstract: An electric power tool includes a motor having a drive shaft, a tool output shaft rotated by rotational force of the drive shaft, a clutch unit that connects or disconnects a torque transmission line between the drive shaft and the tool output shaft according to load torque of the tool output shaft, a load detector that outputs a load torque signal in accordance with the load torque of the tool output shaft, and a control unit that performs a rising detection mode, which detects rising of the load torque signal to stop rotation of the motor, and a falling detection mode, which detects falling of the load torque signal to stop rotation of the motor. The control unit selects the rising detection mode or the falling detection mode according to a usage condition signal indicating a usage condition of the electric power tool.