A tool driver for a power trowel, the tool driver comprising a combination of a magnetic fastening arrangement and a hook and loop based fastening arrangement for releasably holding an abrasive tool to the tool driver, wherein the magnetic fastening arrangement is configured symmetrically around a rotational center of the tool driver, wherein the hook and loop based fastening arrangement is adapted to provide increased shear strength during abrasive operation of the tool, and wherein the magnetic fastening arrangement is adapted to provide increased pull strength during lifting of the tool driver.

An abrasion plate includes at least one backing unit including one of a support pad and a support plate. At least one fastening unit is configured to detachably fasten at least one abrasive selected from the group consisting of an abrasive paper and an abrasive fleece, to the at least one backing unit. The abrasion plate further includes at least one backing element on which the abrasive is arranged via the fastening unit when the abrasive is detachably fastened to the at least one fastening unit. The at least one backing element is made from a material having a melting temperature of more than 160° C.

An abrasion plate includes at least one backing unit including one of a support pad and a support plate. At least one fastening unit is configured to detachably fasten at least one abrasive selected from the group consisting of an abrasive paper and an abrasive fleece, to the at least one backing unit. The abrasion plate further includes at least one backing element on which the abrasive is arranged via the fastening unit when the abrasive is detachably fastened to the at least one fastening unit. The at least one backing element is made from a material having a melting temperature of more than 160° C.

A process for automated sanding of a vehicle component surface is provided and includes providing a sanding mechanism having a sanding head engaged with a housing, a rotary motor contained within the housing, the rotary motor having a drive shaft rotatable about an axis and extending outwardly therefrom, a radial plate attached to a first end of the drive shaft, and a sanding disk having an abrasive surface releasably attached to the radial plate; attaching the sanding head to a gimbal having a pressure sensor; powering the rotary motor driving rotation of the drive shaft, the radial plate and the sanding disk in at least one of a clockwise or counterclockwise direction; movably applying the sanding disk to the surface at a maintained constant pressure; and achieving a desired finish on the surface prepared to be primed and painted to a class A auto high sheen surface finish.

A process for automated sanding of a vehicle component surface is provided and includes providing a sanding mechanism having a sanding head engaged with a housing, a rotary motor contained within the housing, the rotary motor having a drive shaft rotatable about an axis and extending outwardly therefrom, a radial plate attached to a first end of the drive shaft, and a sanding disk having an abrasive surface releasably attached to the radial plate; attaching the sanding head to a gimbal having a pressure sensor; powering the rotary motor driving rotation of the drive shaft, the radial plate and the sanding disk in at least one of a clockwise or counterclockwise direction; movably applying the sanding disk to the surface at a maintained constant pressure; and achieving a desired finish on the surface prepared to be primed and painted to a class A auto high sheen surface finish.

A backerplate for a portable drywall sander hub assembly includes a mounting portion and a backerplate body. The mounting portion includes a threaded bore adapted to couple the backerplate to a sander hub. The backerplate body is connected to the mounting portion. The backerplate body forms a plurality of apertures therein positioned radially between an outer circumference of the backerplate body and the mounting portion. The plurality of apertures are adapted for dust to pass therethrough during operation of a drywall sander with the backerplate mounted thereto.

An apparatus includes: a receiving surface configured to receive a stack of grinding discs; a frame arranged substantially parallel to the receiving surface so that the stack of grinding discs is positioned between the receiving surface and the frame, the frame only partially overlapping an outer rim of a topmost grinding disc of the stack of grinding discs; and a mechanical pretensioning unit coupled with the frame such that a defined force is exerted by the frame on the stack of grinding discs.

The present disclosure relates to an abrasive article with a cork backing layer. In addition, the present disclosure relates to a method for producing abrasive articles comprising a cork backing layer.

A device (1) for automatically changing sanding discs (12) includes a stacking device (10) for a plurality of grinding discs (12) and a guide element (16) for orienting the suction openings (32) in the grinding discs (12) along a common central axis (18), wherein the guide element (16) is arranged eccentrically with regard to the central axis (18). A positioning element (17) is provided for positioning a tool head of a grinding device, wherein the positioning element (17) and the guide element (16) are mounted in a floating manner. A device (1) for automatically changing grinding discs (12) includes a detachment device (50), wherein the detachment device (50) has a bearing surface (51) for a grinding-disc receptacle. The bearing surface (51) has an opening (52), the diameter of which is greater than the diameter of the grinding disc (12). A separating element (53) is arranged above the opening (52). A system includes a device (1) for automatically changing grinding discs (12) containing a stacking device (10) and a detachment device (50).

An apparatus (1) for carrying out the replacement of an abrasive element (20) in a machine (100) for finishing surfaces, comprises a support body (10) configured to reversibly engage the abrasive element (20). The support body (10) and the abrasive element (20) provide, at respective engagement surfaces (15,25), mutual engagement members of removable type (16,26) configured to move from an engagement position to a disengagement position by rotating about a rotational axis (110) in a first sense of rotation e, from the disengagement position to the engagement position, by rotating about the rotational axis (110) in a second sense of rotation opposite to the first one. The apparatus furthermore, comprises a displacement device (40) for moving the support body (10) in the space according to at least 1 degree of freedom. The apparatus (1), furthermore, provides at least a removal station (101) for removing an abrasive element (20) from the support body (10), or at least an application station (102) for engaging an abrasive element (20) to the support body (10).