A sanding apparatus for sanding a vicinity of a drywall seam is provided comprising a housing structure including guide structures, a sanding roller, and a motor for driving the sanding roller such that the guide structures guide a sanding depth during sanding. The sanding apparatus further includes a vacuuming mechanism for capturing particles that result from sanding.

A dust shroud having a shroud body with a vacuum port and a tool connection, the shroud body including a top wall and at least one side wall extending downwardly from about a perimeter of the top wall that defines a dust receiving opening, the shroud body having a top wall opening and the tool connection including a flexible fitting with a flexible fitting base joined to the top wall and extending within the top wall opening, the flexible fitting including a plurality of flexible fingers with a base finger portion and an outer finger portion that extends away from top wall and is selectively with a mounting point of the hand held tool and the flexible fingers allowing selective controlled relative movement between the dust shroud and the hand held tool, the fingers having a finger spacing between adjacent flexible fingers and the outwardly extending flexible fingers having a finger length between the top wall and the distal finger end that is greater than 0.75 inches allowing for selective adjustment and relative movement between the dust shroud and the associated hand held grinder.

A holding device, in particular a grinding disc, for a grinding member includes at least one support member that has at least one material opening configured for transverse transport of grinding dust to one side facing the grinding member in a plane parallel to a grinding surface. The holding device further includes at least one securing layer configured to secure the grinding member on the at least one support member. When decoupled from the grinding member, the at least one material opening is at least substantially open on a side facing the grinding member and on a side facing away from the grinding member is substantially delimited by the support member.

An abrasive disc for use with a sanding tool having a plurality of dust collection holes includes a hole pattern consisting of six openings arranged for substantial alignment with the dust collection holes provided in the sanding tool.

An electric grinder with a switched reluctance motor comprises a body, a transmission assembly, a grinding wheel, and a dust-proof assembly. The body includes a first casing and a second casing. The transmission assembly includes a switched reluctance motor disposed in the first casing, a driving module disposed in the second casing, a transmission shaft connected with the switched reluctance motor, and an assemblage seat disposed in the transmission shaft. The assemblage seat includes an assemblage member for assembling the grinding wheel. The dust-proof assembly includes a dust-proof hood disposed in the first casing. Because of being driven by the switched reluctance motor, the electric grinder of the present invention adapts to the cases of phase failure, frequent start-stop operations, and phase inversion.

An abrasive article having a plurality of apertures arranged in a non-uniform distribution pattern, wherein the pattern is spiral or phyllotactic, and in particular those patterns described by the Vogel equation. Also, provided is a back-up pad having a spiral or phyllotactic patterns of air flow paths, such as in the form of open channels. The back-up pad can be specifically adapted to correspond with an abrasive article having a non-uniform distribution pattern. Alternatively, the back-up pad can be used in conjunction with conventional perforated coated abrasives. The abrasive articles having a non-uniform distribution pattern of apertures and the back-up pads can be used together as an abrasive system.

The invention relates to an electric hand-held tool with a tool mount, a motor for driving a tool fastened in the tool mount, and a housing which includes a handle area, a motor area for accommodating the motor, and in which vent openings are configured for the ventilation of the motor. At least in the area of the vent openings, the housing is provided with at least one cover with a closed surface, said cover sitting flush against the housing with an edge area facing the tool mount, being arranged at a distance from the housing in an area above the vent openings, and leaving a gap between the cover and the housing in the area of its edge area facing away from the tool mount.

A rotary sanding system for retro fitting a Rotozip sanding disk to an air tool includes a first disk that may be removably coupled to an air tool thereby facilitating the air tool to rotate the first disk. The first disk has a plurality of openings extending therethrough and air may pass through the openings. A mating unit is coupled to the first disk. The mating unit engages the air tool thereby facilitating the first disk to be removably coupled to the air tool. A sanding disk is removably coupled to the first disk. The sanding disk may abrade a surface when the air tool rotates the first disk.

An Adaptive Dust Shield Device having Zero Standoff Capability for rotary grinders having a bearing housing and an axial groove around the bearing housing. The dust shield has a cover molded from a single shot. The cover has a plurality of upstanding flexible fingers, in multiples of four, which extend upward from the cover. A door is formed in one side of the dust shield cover to allow the user to use the dust shield in zero clearance situations. The flexible fingers have a defined width and are separated apart from each other by a space between each one. The width of the space is less than the defined width of the flexible fingers. A stretchable fitting ring fits onto the bearing housing of the grinder and under the flexible fingers. The flexible fingers are secured onto the stretchable fitting ring by a securing fastener. There are a plurality of vent holes formed in the top wall that are selectively pluggable with plug elements.

A long rod grinding machine reduces the likelihood of dust escaping and falling. The long rod grinding machine includes a head and a rod having an end connected to the head and extending in a front-rear direction. The head includes an electric motor, a pad movable with a driving force from the electric motor, a vertical wall surrounding a radially outer edge of the pad, and a contact member located between the vertical wall and the pad and surrounding the radially outer edge of the pad. The contact member includes a brush holder having one or more through-holes extending in a radial direction of the pad, and a brush located below the brush holder and having a lower end located downward from a lower end of the vertical wall.