An adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. At least one counterweight is movably disposed at least partially within the cavity. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight with the mounting assembly. The stroke adjuster enables the at least one counterweight and mounting assembly to move with respect to one another such that a distance between the at least one counterweight and the mounting assembly may be variably adjusted which, in turn, variably adjust a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has an adjuster ring and a cam mechanism secured with the adjuster ring.

A glassware polishing system includes a base and a wall extending upward from the base. The wall circumscribes and defines a chamber within an inner side of the wall. A first polishing head having a first spindle extends upward from the base within the chamber and has a polishing material disposed about the first spindle. A second polishing head having a second spindle extends upward from the base within the chamber and has a polishing material disposed about the second spindle. At least one motor is disposed in the base and is configured to rotate the polishing heads about vertical axes of rotation defined by the spindles. The polishing heads may simultaneously polish internal and external surfaces of the glassware when the first polishing heads are rotated by the at least one motor.

A glassware polishing system includes a base and a wall extending upward from the base. The wall circumscribes and defines a chamber within an inner side of the wall. A first polishing head having a first spindle extends upward from the base within the chamber and has a polishing material disposed about the first spindle. A second polishing head having a second spindle extends upward from the base within the chamber and has a polishing material disposed about the second spindle. At least one motor is disposed in the base and is configured to rotate the polishing heads about vertical axes of rotation defined by the spindles. The polishing heads may simultaneously polish internal and external surfaces of the glassware when the first polishing heads are rotated by the at least one motor.

An oscillatingly driven machine tool having a housing in which a motor with a motor shaft is received, on which an eccentric element is accommodated, with a spindle head, with a tool spindle that is rotatably mounted about its longitudinal axis in the spindle head, on which a coupling element is non-rotatably received, which cooperates with the eccentric element for generating a movement of the tool spindle which oscillates about its longitudinal axis such that, in addition to the oscillating movement, a differing, superimposed movement is introduced into the coupling element.

An oscillatingly driven machine tool having a housing in which a motor with a motor shaft is received, on which an eccentric element is accommodated, with a spindle head, with a tool spindle that is rotatably mounted about its longitudinal axis in the spindle head, on which a coupling element is non-rotatably received, which cooperates with the eccentric element for generating a movement of the tool spindle which oscillates about its longitudinal axis such that, in addition to the oscillating movement, a differing, superimposed movement is introduced into the coupling element.

A glass grinding apparatus includes a base unit assembly having a work-piece support assembly and a motor housing assembly. The work-piece support assembly includes a work-piece support grating and a water basin. The motor housing assembly includes a motor housing containing a grinding motor and a power supply. The grinding motor has a rotatable motor shaft whose upper end is configured to receive a glass grinding bit operable to grind a glass work-piece situated on the work-piece support grating. In one aspect, the grinding motor operates on direct current provided by an AC/DC power supply that is directly operable with different utility mains. In another aspect, the work-piece support assembly is a discrete unit having lifting handles. In another aspect, the work-piece support grating has water-restriction baffles and/or a water-level view port. In another aspect, an integrated lamp-shield assembly is provided. In another aspect, a self-contained pedestal assembly is provided.

A driving structure for upward-opening abrasive cloth roller mainly consists a motor mounted in the roller. The driving structure includes: a roller, a first side member, a second side member, a motor with an outer ring gear integrated into a rotating structure; and a motor, a linking shaft bearing, a connecting member, a fixed member and a second bearing integrated with the roller as a stationary structure. The power of the motor is transmitted to the linking shaft, the sun gear, the planet gear through the rotating shaft of the motor, and finally transmitted to the outer ring gear, so that the roller can be rotated.

A driving structure for upward-opening abrasive cloth roller mainly consists a motor mounted in the roller. The driving structure includes: a roller, a first side member, a second side member, a motor with an outer ring gear integrated into a rotating structure; and a motor, a linking shaft bearing, a connecting member, a fixed member and a second bearing integrated with the roller as a stationary structure. The power of the motor is transmitted to the linking shaft, the sun gear, the planet gear through the rotating shaft of the motor, and finally transmitted to the outer ring gear, so that the roller can be rotated.

A maintenance device for remotely maintaining the inside of a structure, for example, by deploying a maintenance tool to remotely clean, sandblast using various blast media, and/or paint an interior surface of a building structure.

A handheld sander includes a main body, an extension arm, a follower draft, and a transmission shaft. The main body includes a housing and a drive shaft rotatably disposed in the housing. The extension arm includes a pivot portion rotatably connected with the housing in a way that the extension arm is rotatable relative to the housing, a distal portion opposite to the pivot portion, and an internal accommodation penetrating through the pivot portion and the distal portion. The follower shaft is rotatably disposed in the distal portion of the extension arm. The transmission mechanism is disposed in the internal accommodation and connected between the drive shaft and the follower shaft for transmitting a rotational power from the drive shaft to the follower shaft. As such, the handheld sander can perform a grinding work in a limit, narrow working space.