Abstract: A dust-proof circular saw includes a base placed on a workpiece, a circular saw main body supported on an upper surface side of the base and equipped with an electric motor, and a saw blade driven by the electric motor extending downwardly from the base. The dust-proof circular saw further includes a cooling fan driven by the electric motor to guide air to the electric motor for cooling the electric motor, as well as to a blower mechanism. The blower mechanism blows the cutting chips away by blowing the air generated by the fan out of the circular saw main body in a user-adjustable direction. The blower mechanism has an air outlet configured to blow out the air, and an orientation change mechanism capable of changing the orientation of the air outlet.

Abstract: A power tool such as a portable cutting machine has less gear noise from, for example, a reduction gear train under no load. The power tool includes a blade, an electric motor including a motor shaft, and a gear train that transmits a rotational output from the electric motor to the blade. The gear train includes a first gear supported on the motor shaft, a countershaft, an intermediate gear meshing with the first gear and supported on the countershaft, a final shaft having a distal end attached to the blade, a final gear meshing with the intermediate gear and supported on the final shaft, and at least one elastic member between the final shaft and the final gear.

Abstract: A power tool such as a portable cutting machine has less gear noise from, for example, a reduction gear train under no load. The power tool includes a blade, an electric motor including a motor shaft, and a gear train that transmits a rotational output from the electric motor to the blade. The gear train includes a first gear supported on the motor shaft, a countershaft, an intermediate gear meshing with the first gear and supported on the countershaft, a final shaft having a distal end attached to the blade, a final gear meshing with the intermediate gear and supported on the final shaft, and at least one elastic member between the final shaft and the final gear.

Abstract: A portable power tool includes a first handle extending in an elongated manner and configured to be held by a user, an electric motor, a tool accessory that undergoes orbital and/or rotational motion in response to generation of a rotational driving force by the electric motor, and a battery mounting part configured to detachably attach a battery that serves as a power source for the electric motor. The battery mounting part includes an upward mounting surface on which the battery is mountable, and at least one terminal configured to be electrically connected to the battery when a surface of the battery that includes a connection interface is placed on the mounting surface. The mounting surface is located at a position different from the first handle in the front-rear direction, and is located below an upper side of the first handle in the up-down direction.

Abstract: The dust proof circular saw has a main body with a rotating disc cutter blade and a cover fixed to the body to cover a blade outer radial periphery part. The body is supported by a base such that an angle of the body in the up-down and right-left directions can be adjusted at a base upper side. A further blade outer radial periphery is covered by an auxiliary cover. The auxiliary cover covers a gap between the fixed cover and the base. The auxiliary cover is moved by a mechanism relative to the body in accordance with an angle of the circular saw main body relative to the base in the up-down direction. The auxiliary cover is pivotally connected to the base, and is pivoted around a laterally tilting support shaft in the right-left direction by an interlock mechanism in accordance with a body angle in the right-left direction.

Abstract: A communication adapter 31 for conducting radio communication between a portable machining device 1 and a dust collector 40, such that the dust collector 40 may operate synchronously with the portable machining device 1 with respect to a start/stop operation when performing a cutting task is detachably incorporated in a handle 20 of the portable machining device 1. Because of this arrangement, a high level of dust-proof ability as well as ease of maneuverability in attaching and detaching the communication adapter 31 can be achieved.

Abstract: A portable cutting machine allows a large battery pack to be attached on the rear of a handle unit without largely increasing the height of the handle unit. A portable cutting machine to which a battery pack having a connecting surface is attachable includes a base that comes in contact with a workpiece, a cutting machine body supported on an upper surface of the base and including a cutting blade protruding from a lower surface of the base to cut the workpiece, an electric motor that drives the cutting blade, and a handle unit grippable by a user, and a battery attachment portion located opposite to the cutting blade with respect to the handle unit to receive the battery pack attachable by sliding in a posture with the connecting surface facing sideward.

Abstract: A communication adapter 31 for conducting radio communication between a portable machining device 1 and a dust collector 40, such that the dust collector 40 may operate synchronously with the portable machining device 1 with respect to a start/stop operation when performing a cutting task is detachably incorporated in a handle 20 of the portable machining device 1. Because of this arrangement, a high level of dust-proof ability as well as ease of maneuverability in attaching and detaching the communication adapter 31 can be achieved.

Abstract: An electric tool may include a tubular housing, a motor disposed within the housing, and a tool holder rotatably driven by the motor and capable of holding an end tool. A shoe may be supported by the housing and may determine a protruding length of the end tool from one end of the housing. A battery mount portion may be disposed at the other end of the housing. The battery may be mounted to the battery mount portion as the battery is slid relative to the battery mount portion along a direction intersecting the extending direction of the housing.

Abstract: A communication adapter 31 for conducting radio communication between a portable machining device 1 and a dust collector 40, such that the dust collector 40 may operate synchronously with the portable machining device 1 with respect to a start/stop operation when performing a cutting task is detachably incorporated in a handle 20 of the portable machining device 1. Because of this arrangement, a high level of dust-proof ability as well as ease of maneuverability in attaching and detaching the communication adapter 31 can be achieved.

Abstract: A dust-proof circular saw includes a base placed on a workpiece, a circular saw main body supported on an upper surface side of the base and equipped with an electric motor, and a saw blade driven by the electric motor extending downwardly from the base. The dust-proof circular saw further includes a cooling fan driven by the electric motor to guide air to the electric motor for cooling the electric motor, as well as to a blower mechanism. The blower mechanism blows the cutting chips away by blowing the air generated by the fan out of the circular saw main body in a user-adjustable direction. The blower mechanism has an air outlet configured to blow out the air, and an orientation change mechanism capable of changing the orientation of the air outlet.

Abstract: The dust proof circular saw has a main body with a rotating disc cutter blade and a cover fixed to the body to cover a blade outer radial periphery part. The body is supported by a base such that an angle of the body in the up-down and right-left directions can be adjusted at a base upper side. A further blade outer radial periphery is covered by an auxiliary cover. The auxiliary cover covers a gap between the fixed cover and the base. The auxiliary cover is moved by a mechanism relative to the body in accordance with an angle of the circular saw main body relative to the base in the up-down direction. The auxiliary cover is pivotally connected to the base, and is pivoted around a laterally tilting support shaft in the right-left direction by an interlock mechanism in accordance with a body angle in the right-left direction.

Abstract: An electric tool may include a tubular housing, a motor disposed within the housing, and a tool holder rotatably driven by the motor and capable of holding an end tool. A shoe may be supported by the housing and may determine a protruding length of the end tool from one end of the housing. A battery mount portion may be disposed at the other end of the housing. The battery may be mounted to the battery mount portion as the battery is slid relative to the battery mount portion along a direction intersecting the extending direction of the housing.

Abstract: An electric tool may include a tubular housing, a motor disposed within the housing, and a tool holder rotatably driven by the motor and capable of holding an end tool. A shoe may be supported by the housing and may determine a protruding length of the end tool from one end of the housing. A battery mount portion may be disposed at the other end of the housing. The battery may be mounted to the battery mount portion as the battery is slid relative to the battery mount portion along a direction intersecting the extending direction of the housing.

Abstract: A shoe attached to a shoe attachment portion includes a spanner portion. As the shoe can be separated from a tool main body of the cutout tool, the shoe can be used as a spanner. The shoe can function as the spanner for replacing a bit in a bit attachment mechanism. In addition, the shoe has its original function of the shoe by which a protrusion amount of the bit can be adjusted. Since the shoe is attached to the shoe attachment portion and held by the tool main body, it turns out that the spanner can be prepared for use with the cutout tool.

Abstract: Two batteries (B1, B2) may be attached to a cutting tool (1), so that the total of the voltages of the two batteries connected in series with each other may be supplied to an electric motor (11) of the cutting tool. The electric motor may have a rated voltage that may be the same as the total of the voltages of the two batteries.

Abstract: A cutting device may include a cutting unit having a cutter for trimming an edge portion of a workpiece or forming a groove in a workpiece. The cutting device may further include a base assembly configured to support the cutting unit with respect to the workpiece, and a grip device capable of being mounted to and removed from the cutting unit independently of the base assembly and configured to be capable of being grasped by a user during a cutting operation.

Abstract: Two batteries (B1, B2) may be attached to a cutting tool (1), so that the total of the voltages of the two batteries connected in series with each other may be supplied to an electric motor (11) of the cutting tool. The electric motor may have a rated voltage that may be the same as the total of the voltages of the two batteries.

Abstract: A fixed operating knob is rotatably arranged on a chain saw body. The fixed operating knob comprises a knob body, a tab, a torsion spring, and a lock member. The knob body is rotatably attached to the chain saw body. The tab is attached to the knob body. The tab is attached so as to be capable of swinging between an operating position projecting from the knob body and a storing position stored in the knob body. The torsion spring biases the tab toward the operating position. When the tab moves to the storing position, the lock member retains the tab at the storing position against a biasing force of the torsion spring.