In an example embodiment, a floor sander comprises a motor having at least two selectable speeds, and a sanding adaptor driven to rotate about a rotational axis by the motor. The sanding adaptor includes a planetary disk that rotates about the rotational axis of the sanding adaptor. In addition, the sanding adaptor includes a plurality of sanding head units, each of which is coupled to the planetary disk for independent rotational movement. Each sanding head unit therefore rotates about its own rotational axis independently of any other sanding head unit or the planetary disk. An isolator is also provided, and is positioned generally between the planetary disk and the motor.

A dual action sander includes a housing, a motor shaft balancer, a balancer shaft, an engaging member and a control rod unit. The motor shaft balancer is disposed in the housing, and is rotatable about a first axis. The control rod unit is movable along the first axis between a locked position, where the balancer shaft is not permitted to rotate about a second axis that is parallel to and spaced apart from the first axis, and an unlocked position, where the balancer shaft is permitted to rotate about the second axis. The engaging member is mounted to one of the balancer shaft and the control rod unit, and is engaged with the other one of the balancer shaft and the control rod unit when the control rod unit is in the locked position.

A dual action sander includes a housing, a motor shaft balancer, a balancer shaft, an engaging member and a control rod unit. The motor shaft balancer is disposed in the housing, and is rotatable about a first axis. The control rod unit is movable along the first axis between a locked position, where the balancer shaft is not permitted to rotate about a second axis that is parallel to and spaced apart from the first axis, and an unlocked position, where the balancer shaft is permitted to rotate about the second axis. The engaging member is mounted to one of the balancer shaft and the control rod unit, and is engaged with the other one of the balancer shaft and the control rod unit when the control rod unit is in the locked position.

An abrasive-means holding device for holding an abrasive means includes a holding body that is operable to rotate about a central axis. The holding body has a first side, a second side facing away from the first side, and a vacuuming opening that extends therethrough from the first side to the second side. The holding body also has a group of aspiration cavities that are arranged on the first side and that are fluidically connected to each other by at least one through-hole that connects the aspiration cavities. At least one aspiration cavity forms a vacuuming cavity that is directly fluidically connected to the vacuuming opening and that is configured to vacuum-off dust immediately out of an adjacent aspiration cavity and mediately out of a more distantly adjacent aspiration cavity. The aspiration cavities of the group are arranged in relation to each other along a linear course.

A handheld multifunction power tool includes a driveshaft, a hub assembly, and a stem. The hub assembly includes an outer hub and an inner hub that is rotatably coupled with the inner hub and rotatable with respect to the outer hub. Rotation of the inner hub relative to the outer hub facilitates selection from among a rotary mode and a random orbital mode.

A handheld multifunction power tool includes a driveshaft, a hub assembly, and a stem. The hub assembly includes an outer hub and an inner hub that is rotatably coupled with the inner hub and rotatable with respect to the outer hub. Rotation of the inner hub relative to the outer hub facilitates selection from among a rotary mode and a random orbital mode.

An automatic adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. A counterbalance shaft assembly is rotatably disposed at least partially within the cavity. A shaft portion of the counterweight shaft assemblies aligned with the central axis. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the counterweight shaft with the mounting assembly. The stroke adjuster enables the mounting assembly to adjust its stroke upon rotation of counterweight shaft. The mounting assembly variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has a gear automatically adjusting the mounting assembly stroke.

An automatic adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. A counterbalance shaft assembly is rotatably disposed at least partially within the cavity. A shaft portion of the counterweight shaft assemblies aligned with the central axis. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the counterweight shaft with the mounting assembly. The stroke adjuster enables the mounting assembly to adjust its stroke upon rotation of counterweight shaft. The mounting assembly variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has a gear automatically adjusting the mounting assembly stroke.

An adjustable stroke mechanism 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 adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly may be variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

An apparatus for replacing an abrasive sheet in a sanding machine comprising a working head in which it is provided a support body having an engagement surface arranged to engage with an abrasive sheet. The sanding machine also comprises a handling device arranged to actuate the support body in space according to at least two degrees of freedom. The face of the abrasive sheet facing, in use, towards the support body and the engagement surface of this comprises a mutual engagement means of removable type. For example, the mutual engagement means can provide a layer of Velcro, i.e. a velvet layer on a face and a plurality of hooks on the other face, or an adhesive layer, in particular of reversible glue layer, or a plurality of projections and recesses mutually engageable with each other, or similar engagement elements. Furthermore, is provided a removal station in which it is installed a removal device having a sharp edge arranged to remove the sheet from the support body through a plurality of operations.