The grinding device is for removing a collapsed liner inside a pipe. The grinding device has a connector for a drive shaft, a body rotatable around a rotation axis with the drive shaft and grinding cutters attached to the body. The grinding cutters have cutting edges provided in a plane perpendicular to the rotation axis of the body and the grinding device further has an outer periphery isolated from rotation of the body by bearings.

The grinding device is for removing a collapsed liner inside a pipe. The grinding device has a connector for a drive shaft, a body rotatable around a rotation axis with the drive shaft and grinding cutters attached to the body. The grinding cutters have cutting edges provided in a plane perpendicular to the rotation axis of the body and the grinding device further has an outer periphery isolated from rotation of the body by bearings.

One exemplary embodiment relates to a device for the robot-assisted machining of surfaces. According to one example, the device has a carrier structure, a motor, a linear actuator, and a machining head. The machining head is coupled to the carrier structure by means of the linear actuator and has a drive shaft for directly or indirectly driving a rotatable tool. The device also has a flexible shaft, which couples a motor shaft of the motor to the drive shaft of the machining head.

One exemplary embodiment relates to a device for the robot-assisted machining of surfaces. According to one example, the device has a carrier structure, a motor, a linear actuator, and a machining head. The machining head is coupled to the carrier structure by means of the linear actuator and has a drive shaft for directly or indirectly driving a rotatable tool. The device also has a flexible shaft, which couples a motor shaft of the motor to the drive shaft of the machining head.

An electrical tool including: a cutter bit assembly, a driving mechanism for providing a power to the cutter bit assembly, and a flexible transmission mechanism, which is connected at one end thereof to the driving mechanism and connected at the other end thereof to the cutter bit assembly; the flexible transmission mechanism is twistable and bendable, and is configured to transmit the power provided by the driving mechanism to the cutter bit assembly.

A technoscopic instrument (1) for machining surfaces in technical cavities, includes a stationary, tubular shank (7) and a tool unit (11), for holding a machining tool (13), arranged distally on the shank (7) and pivotable transversely to a longitudinal axis (37) thereof by way of a joint (9). The tool unit (11) is coupled to a first adjusting unit (17) which is arranged proximally on the instrument (1). The pivotable tool unit (11) includes an end section (43) which is arranged distally to the joint (9), is mounted in an axially displaceably and via an elongate control element (49) which is pull-rigid, push-stiff and pliable transverse to its longitudinal axial extension is coupled to a second adjusting unit (23) which is arranged proximally on the instrument (1) and which is provided independently and separately of the first adjusting unit (17), for selective telescoping of the end section (43).

A technoscopic instrument (1) for machining surfaces in technical cavities, includes a stationary, tubular shank (7) and a tool unit (11), for holding a machining tool (13), arranged distally on the shank (7) and pivotable transversely to a longitudinal axis (37) thereof by way of a joint (9). The tool unit (11) is coupled to a first adjusting unit (17) which is arranged proximally on the instrument (1). The pivotable tool unit (11) includes an end section (43) which is arranged distally to the joint (9), is mounted in an axially displaceably and via an elongate control element (49) which is pull-rigid, push-stiff and pliable transverse to its longitudinal axial extension is coupled to a second adjusting unit (23) which is arranged proximally on the instrument (1) and which is provided independently and separately of the first adjusting unit (17), for selective telescoping of the end section (43).

An electrical tool including: a cutter bit assembly, a driving mechanism for providing a power to the cutter bit assembly, and a flexible transmission mechanism, which is connected at one end thereof to the driving mechanism and connected at the other end thereof to the cutter bit assembly; the flexible transmission mechanism is twistable and bendable, and is configured to transmit the power provided by the driving mechanism to the cutter bit assembly.

Reciprocating tool accessories are presented including: a damping handle assembly; and a surface contact assembly coupled with the damping handle assembly along a distal end and the reciprocating tool along a proximal end. In some embodiments, the damping handle assembly includes: a grip portion, the grip portion defining a housing, where the grip portion includes, a reciprocal connector subassembly at least partially contained within the housing; and a contact roller portion releasably coupled with the grip portion, where the contact roller portion includes, at least one horizontal contact roller coupled with and aligned along the grip portion, and at least one vertical contact roller coupled with and extending from the grip portion along a grip portion end. In some embodiments, the grip portion further includes a contoured surface.

A system provides in-situ surface processing of an engine blade within an aircraft engine. The system includes an endoscopic processing instrument with a variable-angle tubular shaft. The processing instrument is inserted radially through a lateral access opening into the aircraft engine in a non-angled initial configuration. The lateral access opening is downstream of the engine blade. The processing instrument has a rotatably driven tool holder at a distal end of the shaft for a surface processing tool head. In an angled working configuration, a tool head inserted into the tool holder is applied to a flow edge of the engine blade. Furthermore, a process uses the corresponding system.