A dust collector for an angle grinder comprises a collector body for covering a circular grinding disk, a sealing element for sealing at least some sections of the collector body from a surface to be machined by the grinding disk, at least some sections of the sealing element being placeable in a first and a second retaining rail, and a suction terminal via which the abraded surface particles can be sucked off the collector body. The first retaining rail extends along a closed periphery of the collector body, and in the collector body, the sealing element is spring-mounted by at least one spring element in the axial direction relative to the axis of rotation of the grinding disk.

An example trimming tool includes a floating base having a first side and an opposite, second side, a first rail, and a second rail. At least the second side of the floating base, the first rail and the second rail define a workspace having a first opening and a second opening. The trimming tool also includes a milling apparatus, attached to the floating base, having a base on the first side of the floating base and a milling head on the second side of the floating base. The milling head is spring loaded. The floating base and milling apparatus are configured to remove at least a portion of a foam layer in the workspace.

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.

A dust collector for an angle grinder, comprising a collector body for covering a circular grinding wheel, and a sealing element extending along an outer periphery (U) of the collector body for at least partially sealing the collector body against a surface to be machined by means of the grinding wheel, and comprising a suction connection, by way of which material removed from the surface can be suction out of the collector body. In an axial direction with respect to the axis of rotation (R) of the grinding wheel, the sealing element is spring-mounted in the collector body by means of at least one spring element.

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.

A grinding machine includes a grinding machine body and a grinding disc connected to the grinding machine body. The grinding machine body is provided with a pressure cavity at a position facing the grinding disc and a gas intake pipe corresponding to the pressure cavity. A pressure release gap in communication with the pressure cavity is formed between the grinding machine body and the grinding disc. The gas intake pipe induces a high-pressure gas into the pressure cavity, which receives an effect of the high-pressure gas to become a positive-pressure environment. The high-pressure gas is continually released via the pressure release gap to prohibit external dust from entering the pressure cavity. Thus, the grinding machine is capable of preventing dust from accumulating in the pressure cavity as well as effectively preventing moisture from entering the pressure cavity when the grinding machine is applied for wet grinding.

An electric grinding machine includes a spindle to be driven with a motor; a grinding disc attached to the spindle; a cover covering the grinding disc; a window disposed on the cover to expose an outer circumference of the grinding disc; a hinge mechanism joining the window to the cover so that the window freely moves between an opened position and a closed position, said hinge mechanism having a rotational axis disposed on the cover; a gate protruding from the window and having a cylindrical portion concentrical to the rotational axes; a hollowed portion formed in the gate, said hollowed portion forming a passage opening between the cover and the cylindrical portion when the window is closed; a slider disposed on the cover, said slider passes through the passage opening to hold the window in the closed position; and a piston spring urging the slider toward the window.

A portable machining apparatus includes a motor, an output shaft extending in an axial direction and configured to be rotated by a rotational driving force of the motor, a tool accessory configured to perform an eccentric circular motion in response to the rotation of the output shaft, a dust collection fan fixed to the output shaft so as to circumferentially surround the output shaft, a motor cooling fan configured to be rotated by the rotational driving force of the motor, and a balancer attached to at least one fan of the dust collection fan and the motor cooling fan. A flow passage is formed so as to radially outward exhaust air flowing in the axial direction toward the at least one fan at a circumferential position between an edge portion opposite from the balancer in the axial direction and the balancer at which position the balancer is attached.

An automated rover device removes material from opposite surfaces of an elongate part, such as a composite stiffener. The device includes a pair of material removal tools along with a vacuum assembly for vacuuming away material removed by the tools.

An abrasive finishing article with an adapter or hub to attach to an appropriate power tool, wherein the hub contains sets of slots to receive ribs positioned on a grinding wheel to permit adjustment of the height of the hub to change the overall height of the grinding wheel and abrasive finishing article.