Embodiments described herein generally relate to a grinding disc is being rotatably drivable around an axis of rotation. The grinding disc has a front side as well as a rear side facing away from the front side. The grinding disc further includes a multi-layered circular grinding blank packet with a plurality of circular grinding blanks. The grinding blanks are flatly stacked over each other along the axis of rotation and in which each grinding blank includes a central through opening. The central through openings form together a recess of the circular grinding blank packet. Wherein the grinding disc has a backing plate, which is arranged in the recess, and the circular grinding blanks each are fixed individually to the backing plate.

The device is for grinding a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle. The protrusions have a strip causing an elastic force when being bent. The protrusions are arranged to position the device or a part of the device inside the pipe. The protrusions have blades arranged to grind the inner surface of the pipe, while the spindle is being rotated.

The device is for grinding a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle. The protrusions have a strip causing an elastic force when being bent. The protrusions are arranged to position the device or a part of the device inside the pipe. The protrusions have blades arranged to grind the inner surface of the pipe, while the spindle is being rotated.

A sanding tool is adapted to be attached to an existing wood board molding machine. The sanding tool provides a rotating sanding drum which removes imperfections from the profile of the molding as it exits the molding machine. The sanding drum is height adjustable and is powered by an electric motor.

A device used for cutting a pipe from an inside. The device has a spindle arranged to be rotated. The device further has protrusions fastened to the spindle and arranged to position the device or a part of the device inside the pipe. The protrusions have at least one blade arranged to machine material off the inner surface of the pipe to cut the pipe while the spindle is being rotated.

Disclosed is a holding device (1) for abrasive strips (2). The holding device (1) comprises a drum (3) being substantially cylindrical and including a number of undercut axial grooves (4) extending from a first axial drum end (5) of the drum (3) toward a second axial drum end (6) of the drum (3), wherein one or more stops (7) are arranged to block at least a part of each of the number of undercut axial grooves (4) at the second axial drum end (6), wherein the drum (3) comprises a blind hole (8) in the centre of the first axial drum end (5), and wherein a non-circular engagement indentation (9) is formed in the centre of the bottom (10) of the blind hole (8). The holding device (1) also comprises a shaft (11) arranged coaxially with the drum (3), wherein the shaft (11) comprises a main shaft part (12) including a first axial shaft end (13) extending from the drum (3) and arranged for being connected to rotation drive means. The shaft (11) further comprises an external non-circular engagement structure (14) arranged at a second axial shaft end (15) of the main shaft part (12), wherein the external non-circular engagement structure (14) is arranged in the non-15 circular engagement indentation (9) to rotatably lock the shaft (11) to the drum (3), and wherein the greatest radial extent (GES) of the external non-circular engagement structure (14) is greater than the greatest radial extent (GEM) of the main shaft part (12). Furthermore, the holding device (1) comprises an end plug (16) being releasably connected to the drum (3), wherein the end plug (16) comprises a centre protrusion (17) extending into the blind hole (8) to restrict axial displacement of the external non-circular engagement structure (14) to substantially fixate an axial position of the shaft (11) in relation to the cylindrical drum (3) and wherein the end plug (16) further comprises groove blocking means (18) arranged to block at least a part of each of the number of undercut axial grooves (4) at the first axial drum end (5). Use of a holding device (1) is also disclosed.

Disclosed is a holding device (1) for abrasive strips (2). The holding device (1) comprises a drum (3) being substantially cylindrical and including a number of undercut axial grooves (4) extending from a first axial drum end (5) of the drum (3) toward a second axial drum end (6) of the drum (3), wherein one or more stops (7) are arranged to block at least a part of each of the number of undercut axial grooves (4) at the second axial drum end (6), wherein the drum (3) comprises a blind hole (8) in the centre of the first axial drum end (5), and wherein a non-circular engagement indentation (9) is formed in the centre of the bottom (10) of the blind hole (8). The holding device (1) also comprises a shaft (11) arranged coaxially with the drum (3), wherein the shaft (11) comprises a main shaft part (12) including a first axial shaft end (13) extending from the drum (3) and arranged for being connected to rotation drive means. The shaft (11) further comprises an external non-circular engagement structure (14) arranged at a second axial shaft end (15) of the main shaft part (12), wherein the external non-circular engagement structure (14) is arranged in the non-15 circular engagement indentation (9) to rotatably lock the shaft (11) to the drum (3), and wherein the greatest radial extent (GES) of the external non-circular engagement structure (14) is greater than the greatest radial extent (GEM) of the main shaft part (12). Furthermore, the holding device (1) comprises an end plug (16) being releasably connected to the drum (3), wherein the end plug (16) comprises a centre protrusion (17) extending into the blind hole (8) to restrict axial displacement of the external non-circular engagement structure (14) to substantially fixate an axial position of the shaft (11) in relation to the cylindrical drum (3) and wherein the end plug (16) further comprises groove blocking means (18) arranged to block at least a part of each of the number of undercut axial grooves (4) at the first axial drum end (5). Use of a holding device (1) is also disclosed.

A surface treatment tool comprising an annular carrier substrate and a plurality of abrasive lamellae connected to the carrier substrate by their narrow sides in a contacting side-by-side arrangement or juxtaposition of their flat sides, at least some of which are fiber fleece lamellae. The carrier substrate is a flexible belt, the ends of which pointing in the longitudinal extension of the belt are connected to one another to form an annular shape. The fiber fleece lamellae are connected to the outward-facing surface of the flexible belt by means of an adhesive connection with flexible material properties in a state in which the lamellae are elastically compressed with respect to their thickness.