A conditioner of a chemical mechanical polishing (CMP) apparatus includes a conditioning part to polish a polishing pad, an arm to rotate the conditioning part, and a flexible connector connecting the conditioning part with the arm, the flexible connector being moveable to allow relative movements of the conditioning part with respect to the arm.

The present invention provides an end face polishing device capable of improving a polishing accuracy by polishing an end face of an optical fiber ferrule with adjusted polishing pressure. An end face polishing device 1 for optical fiber ferrule for polishing an end face of an optical fiber ferrule by applying a polishing pressure between a polishing plate 5 driven by a polishing drive shaft and an optical fiber ferrule held by a holding portion 9. The end face polishing device for optical fiber ferrule has: a bearing portion for allowing the polishing plate 5 to rotate relatively around the polishing drive shaft and to move relatively to the polishing drive shaft in an axial direction; a polishing plate guide supporting portion 31 for movably supporting the polishing plate 5 on a base portion 3 to apply the polishing pressure to the holding portion 9 by allowing the polishing plate 5 to move in the axial direction; a pressing drive source 15 for adjustably outputting a driving force to apply the polishing pressure; and a pressing force transmission mechanism 21 for transmitting the driving force output from the pressing drive source 15 as a pressing force in the axial movement direction of the polishing plate 5.

The present invention provides an end face polishing device capable of improving a polishing accuracy by polishing an end face of an optical fiber ferrule with adjusted polishing pressure. An end face polishing device 1 for optical fiber ferrule for polishing an end face of an optical fiber ferrule by applying a polishing pressure between a polishing plate 5 driven by a polishing drive shaft and an optical fiber ferrule held by a holding portion 9. The end face polishing device for optical fiber ferrule has: a bearing portion for allowing the polishing plate 5 to rotate relatively around the polishing drive shaft and to move relatively to the polishing drive shaft in an axial direction; a polishing plate guide supporting portion 31 for movably supporting the polishing plate 5 on a base portion 3 to apply the polishing pressure to the holding portion 9 by allowing the polishing plate 5 to move in the axial direction; a pressing drive source 15 for adjustably outputting a driving force to apply the polishing pressure; and a pressing force transmission mechanism 21 for transmitting the driving force output from the pressing drive source 15 as a pressing force in the axial movement direction of the polishing plate 5.

A concrete grinder has a rotating planetary gearbox with counter rotating tooling plates attached. The planetary gearbox is powered directly from a trowel gearbox output shaft, which is connected to a center bore of the planetary gearbox. As the planetary gearbox rotates, tooling shafts are forced to counter rotate because the input shaft of the planetary gearbox is connected to a fixed pulley or sprocket. The planetary gearbox is sealed to keep water, dust or slurry from entering.

A concrete grinder has a rotating planetary gearbox with counter rotating tooling plates attached. The planetary gearbox is powered directly from a trowel gearbox output shaft, which is connected to a center bore of the planetary gearbox. As the planetary gearbox rotates, tooling shafts are forced to counter rotate because the input shaft of the planetary gearbox is connected to a fixed pulley or sprocket. The planetary gearbox is sealed to keep water, dust or slurry from entering.

A grinder including a motor, a switch operated ON and OFF in accordance with an operation of a switch lever to control a rotation of an output shaft of the motor, a spindle that rotates in accordance with the rotation of the output shaft to rotate a disk-shaped grinding wheel and a brake mechanism controllable with respect to a brake plate that integrally rotates with the output shaft, in a housing, the brake plate includes fins.

A grinder including a motor, a switch operated ON and OFF in accordance with an operation of a switch lever to control a rotation of an output shaft of the motor, a spindle that rotates in accordance with the rotation of the output shaft to rotate a disk-shaped grinding wheel and a brake mechanism controllable with respect to a brake plate that integrally rotates with the output shaft, in a housing, the brake plate includes fins.

The disclosure discloses an electric power tool. The electric power tool may include a motor, a power transmission mechanism connected to the motor, a housing that houses the motor and the power transmission mechanism, an end tool holder to which an end tool is configured to be attached and from which the end tool is configured to be detached, and connected to the power transmission mechanism, and a handle attached to the housing. The electric power tool may be configured to prohibit rotation of the motor when a user is not gripping the handle.

The disclosure discloses an electric power tool. The electric power tool may include a motor, a power transmission mechanism connected to the motor, a housing that houses the motor and the power transmission mechanism, an end tool holder to which an end tool is configured to be attached and from which the end tool is configured to be detached, and connected to the power transmission mechanism, and a handle attached to the housing. The electric power tool may be configured to prohibit rotation of the motor when a user is not gripping the handle.

A hand-held machine tool, in particular a sanding machine, including a rod-type handle element for the user to grip and a processing head which is moveably mounted on the handle element by means of a joint assembly. The processing head has an electric drive motor for driving a tool holder provided for holding a processing tool and a speed-reducing gearbox between the drive motor and the tool holder, the gearbox being designed to achieve a reduction in speed of an output of the drive motor relative to a speed of the tool holder. The drive motor is a brushless motor and a power supply system for the drive motor is arranged at a distance from the drive motor on the handle element, the power supply system being connected to the drive motor by means of a cable arrangement.