A modular tool bit holder system includes an angle tool bit holder, and a flexible shaft tool bit holder. The angle tool bit holder includes a housing containing a first input shaft, a first angle gear rotatably drivable about a first axis, a second angle gear, and a first bit holder rotatably drivable by the first angle gear about a second axis at an angle to the first axis. The flexible shaft tool bit holder includes a second input shaft, a flexible intermediate shaft rotatably drivable by the second input shaft, and a second tool bit holder rotatably drivable by the flexible intermediate shaft. The angle tool bit holder and the flexible shaft tool bit holder are operable separately or in combination. A connection assembly is configured to non-rotatably couple the angle tool bit holder and the flexible shaft tool bit holder when they are operable in combination.

A power tool that is configured to provide finishing of a surface of an object wherein the power tool provides movement in a first direction and a second direction. The power tool of the present invention includes a housing wherein the housing has a coupling assembly secured to the front end thereof. The rear end of the housing includes a brush compartment formed therein. A sanding member is releasably secured to the coupling assembly and includes a planar body configured to have sanding paper secured thereto. A filing member is also provided and configured to be releasably secured to the coupling assembly. The filing member includes a rectangular body having formations on the outer surface thereof. A three-way switch provides control to move the sanding member and the filing member in the first and second direction. A battery power supply is disposed in the housing.

A power tool that is configured to provide finishing of a surface of an object wherein the power tool provides movement in a first direction and a second direction. The power tool of the present invention includes a housing wherein the housing has a coupling assembly secured to the front end thereof. The rear end of the housing includes a brush compartment formed therein. A sanding member is releasably secured to the coupling assembly and includes a planar body configured to have sanding paper secured thereto. A filing member is also provided and configured to be releasably secured to the coupling assembly. The filing member includes a rectangular body having formations on the outer surface thereof. A three-way switch provides control to move the sanding member and the filing member in the first and second direction. A battery power supply is disposed in the housing.

A power tool includes a body housing including a first grip, inlet facing a front surface of the first grip, first outlet, and second outlet; a brushless motor held on the body housing and including a rotational shaft; an output unit supported on the body housing in a reciprocable manner; a power transmission mechanism between the brushless motor and the output unit in the body housing to transmit rotational motion of the rotational shaft to the output unit; a controller held on the body housing to control the brushless motor; and a fan held on the body housing and mounted on the rotational shaft. The body housing allows air drawn through the inlet and having cooled the brushless motor to be divided into first and second outlet blows respectively cooling the power transmission mechanism and discharged through the first outlet, and cooling the controller and discharged through the second outlet.

A power tool has a motor having a rotary shaft, an eccentric shaft configured to be rotated around a rotation center axis of the rotary shaft, and a balancer configured to rotate with the rotary shaft. When viewed along the rotation center axis, (1) a first imaginary line passes the rotation center axis and an eccentric axis, (2) an imaginary perpendicular line crosses perpendicularly to the first imaginary line and passes the rotation center axis, (3) a center of gravity of the balancer is located in a region on a side opposite to the eccentric axis across the imaginary perpendicular line; and (4) a second imaginary line passes the rotation center axis and the center of gravity of the balancer and (5) the second imaginary is inclined at an inclination angle larger than 0° and smaller than 90° in a direction opposite to a rotating direction of the rotary shaft.

A power tool has a motor having a rotary shaft, an eccentric shaft configured to be rotated around a rotation center axis of the rotary shaft, and a balancer configured to rotate with the rotary shaft. When viewed along the rotation center axis, (1) a first imaginary line passes the rotation center axis and an eccentric axis, (2) an imaginary perpendicular line crosses perpendicularly to the first imaginary line and passes the rotation center axis, (3) a center of gravity of the balancer is located in a region on a side opposite to the eccentric axis across the imaginary perpendicular line; and (4) a second imaginary line passes the rotation center axis and the center of gravity of the balancer and (5) the second imaginary is inclined at an inclination angle larger than 0° and smaller than 90° in a direction opposite to a rotating direction of the rotary shaft.

An externally-powered strapping tool includes a strapping tool assembly configured to perform one or more strapping operations; and an external power source operatively coupled thereto, the external power source being attached to the strapping tool assembly in a substantially immovable manner. According to another aspect, a strapping tool assembly includes one or more strapping tool subassemblies configured to perform one or more strapping operations; a power transfer subassembly operatively coupled to the one or more strapping tool subassemblies, the power transfer subassembly configured to transfer motive power from the external power source to the one or more strapping tool subassemblies; and a coupling member configured to couple the strapping tool assembly to the external power source.

An externally-powered strapping tool includes a strapping tool assembly configured to perform one or more strapping operations; and an external power source operatively coupled thereto, the external power source being attached to the strapping tool assembly in a substantially immovable manner. According to another aspect, a strapping tool assembly includes one or more strapping tool subassemblies configured to perform one or more strapping operations; a power transfer subassembly operatively coupled to the one or more strapping tool subassemblies, the power transfer subassembly configured to transfer motive power from the external power source to the one or more strapping tool subassemblies; and a coupling member configured to couple the strapping tool assembly to the external power source.

An oscillating tool includes a housing, a motor housed in the housing and a clamp assembly operatively driven by the motor in an oscillating motion. The clamp assembly can hold an accessory such as a blade or sanding attachment, and the clamp assembly includes a first clamp and a second clamp. The oscillating tool also includes a clamp lever and an actuating lever. The clamp lever is operatively coupled to the first clamp to move the first clamp such that clamp assembly is moved from a closed position to an open position. The actuating lever is operatively coupled to the clamp lever to effect movement of the clamp lever, movement of the clamp lever causing the clamp assembly to move from the closed position to the open position.

A power tool device comprises a housing, a transmission mechanism installed in the housing, and an adapting mechanism deployed with a tool head, a switch member adopted for manipulating the attachment and detachment between the transmission mechanism and the adapting mechanism in a steady and safety manner. Therefore, that the operator only needs to carry a variety of tool heads and a power tool device is ample enough to deal with most of the situations which makes it much easier for the operators to work in a high flexibility and efficiency fashion.