A sanding disc stabilizing structure of an orbital sander comprises a casing, a sanding power source, a sanding disc, and at least four springs. The sanding power source is assembled on the casing and comprises a drive shaft and a tool holder disposed on the drive shaft and offset from an axis of the drive shaft. The center of the sanding disc driven by the sanding power source to perform an orbital motion is disposed on the tool holder with a locking screw. Two ends of each of the at least four springs are respectively disposed on the casing and the sanding disc. The free length of each of at least four springs is greater than the spacing between an installation part of the casing and an installation part of the sanding disc provided for one of the at least four springs.

A sanding disc stabilizing structure of an orbital sander comprises a casing, a sanding power source, a sanding disc, and at least four springs. The sanding power source is assembled on the casing and comprises a drive shaft and a tool holder disposed on the drive shaft and offset from an axis of the drive shaft. The center of the sanding disc driven by the sanding power source to perform an orbital motion is disposed on the tool holder with a locking screw. Two ends of each of the at least four springs are respectively disposed on the casing and the sanding disc. The free length of each of at least four springs is greater than the spacing between an installation part of the casing and an installation part of the sanding disc provided for one of the at least four springs.

A processing device with a constant force spindle capable of quickly switching a force control axial direction and a processing method thereof, having a quick-detach unit fixed at a constant force control unit by a first quick-connecting piece, and respectively connecting and moving synchronously with the spindle by a second quick-connecting piece and a third quick-connecting piece, the first quick-connecting piece moves along with a working end of a multi-axial transfer unit, and when combined, a first axial direction that is coaxial with the force control axial direction is defined; alternatively, the first quick-connecting piece moves along with the working end of the multi-axial transfer unit, and when combined, a second axial direction that is coaxial with the force control axial direction is defined, the first axial direction is not parallel to the second axial direction and has an included angle.

A grinding apparatus has a grinding wheel fastened to a mount disk connected a spindle by a plurality of bolts. The mount disk has at least three threaded holes and a plurality of protrusions protruding from a mount surface thereof. Each of the bolts includes an externally threaded shank, a neck coupled to the externally threaded shank, and an engaging flange coupled to the neck and extending radially outwardly. The grinding wheel includes an annular open hole defined in a mating surface of an annular base for mating with the mount surface, an annular slot that is wider than the annular open hole and is fluidly connected to the annular open hole, at least three insertion holes in the annular open hole for allowing the engaging flange to be inserted into the annular slot, and a plurality of protrusion insertion holes for receiving the engaging flanges of the bolts.

A grinder tool with blind mounting of a disc includes a center alignment mechanism having a first contact and a second contact and a rotational device including an axle that is movable with respect to the center alignment mechanism. A hub is mounted to the axle including a first coupling interface. The disc has a second coupling interface for mating with the first coupling interface. The center alignment mechanism is movable a mounting distance relative to the hub and contacts the disc with the first contact and the second contact to center align the first coupling interface with the second coupling interface. The rotational device is to slowly rotate the hub to angle align the first coupling interface with the second coupling interface to allow the disc to mate and attach to the hub.

A grinder tool with blind mounting of a disc includes a center alignment mechanism having a first contact and a second contact and a rotational device including an axle that is movable with respect to the center alignment mechanism. A hub is mounted to the axle including a first coupling interface. The disc has a second coupling interface for mating with the first coupling interface. The center alignment mechanism is movable a mounting distance relative to the hub and contacts the disc with the first contact and the second contact to center align the first coupling interface with the second coupling interface. The rotational device is to slowly rotate the hub to angle align the first coupling interface with the second coupling interface to allow the disc to mate and attach to the hub.

Proposed is a coupler structure of a hand grinder. The coupler structure is fastened to a rotating shaft of a grinder body to enable a machining disc to be more simply and rapidly attached to or detached from the grinder body. Fabrication costs are significantly reduced by simplifying the components associated with the coupler mounted on the rotating shaft of the grinder body. Since the consumable disc is easily attached to and detached from the coupler with one touch, a replacement operation is performed rapidly, thereby significantly improving the efficiency of work.

A quick clamping device for arranging at least one application tool on a power tool, in particular on an angle grinder, includes at least one output unit for moving the application tool about an output axis of the output unit, and at least one fixing unit having at least one movably mounted fixing element that is mounted, in particular in a non-removable manner, on the output unit, at least for axially fixing the application tool to the output unit. The quick clamping device has at least one securing unit, which has at least one, in particular movably mounted, securing element that is intended to secure the fixing element, which is mounted so as to be movable relative to the output unit at least about the output axis, so as to prevent the fixing element from moving about the output axis.

An abrasive article and method of making same wherein the abrasive article comprises a mounting assembly and an abrasive attachment assembly wherein the first interlock member of the mounting assembly and the second interlock member of the abrasive attachment assembly are configured to align the central axis of the abrasive attachment assembly and the central axis of the mounting assembly, and the first interlock member releasably engages the second interlock member. The abrasive article is adapted to clean a work surface area around studs using a rotary tool, including, for example, a drills or die grinder.

An abrasive article and method of making same wherein the abrasive article comprises a mounting assembly and an abrasive attachment assembly wherein the first interlock member of the mounting assembly and the second interlock member of the abrasive attachment assembly are configured to align the central axis of the abrasive attachment assembly and the central axis of the mounting assembly, and the first interlock member releasably engages the second interlock member. The abrasive article is adapted to clean a work surface area around studs using a rotary tool, including, for example, a drills or die grinder.