A rotary tool containing a core hub with helical groove on its outer surface filled in with continuous abrasive filament formed by folding of a pre-cut abrasive sheet including multiple bristle like straps extending radially from the hub. The method of manufacturing includes the steps of providing a hub, and forming a helical groove with inverted V-shaped cross-section along its cylindrical surface. An abrasive element is wound around the hub so that the folded edge is fed in the V-grove and is buckled inside the groove providing, along with securing it by sufficient pre-tension of the abrasive element, a secure anchoring of the abrasive element through locking of the buckled edge. The abrasive filament is formed from a roll of abrasive cloth as one continuous piece using a cutting operation and is provided with center-line perforations. These perforations assist folding the filament by providing it with discrete and desired flexibility as well as weakening it in such way that it assists the process of folded edge buckling inside the groove during winding and therefore forms a tight anchoring junction with the hub without need for an adhesive.

Rotary tools configured to sand components and accommodate complex geometries thereof are provided. The rotary tools may include a rotary head and a shaft. Bristles and an abrasive material may be coupled to the abrasive material. The rotary tools may additionally include outlets configured to receive a flow of coolant to cool the rotary tool. A system configured to convert a flood coolant system to a through spindle coolant system is also provided. The system may include a hollow shaft with inlets and a redirector therein. A flow receptor may include scoops that receive coolant sprayed from a flood coolant system and direct the coolant through the inlets in the hollow shaft. Thereby, the coolant may contact the redirector and be directed downward through the hollow shaft to a rotary tool, such as the rotary tool described above.

Rotary tools configured to sand components and accommodate complex geometries thereof are provided. The rotary tools may include a rotary head and a shaft. Bristles and an abrasive material may be coupled to the abrasive material. The rotary tools may additionally include outlets configured to receive a flow of coolant to cool the rotary tool. A system configured to convert a flood coolant system to a through spindle coolant system is also provided. The system may include a hollow shaft with inlets and a redirector therein. A flow receptor may include scoops that receive coolant sprayed from a flood coolant system and direct the coolant through the inlets in the hollow shaft. Thereby, the coolant may contact the redirector and be directed downward through the hollow shaft to a rotary tool, such as the rotary tool described above.

A grinding tool for a grinding device with an oscillatory drive, in particular a rotary oscillatory drive is disclosed, the drive shaft of which can be driven about its longitudinal axis, wherein the grinding tool includes a holder having a support for securing to the drive shaft of the oscillatory drive, and whereon a form profile with a grinding mechanism is provided, wherein the holder includes a profile support for releasable securement of the form profile, and wherein the profile support includes a clamping region, into which the form profile can be inserted with a holding section and can be fixed thereto, and which can be elastically enlarged for releasing the form profile.

A grinding tool for a grinding device with an oscillatory drive, in particular a rotary oscillatory drive is disclosed, the drive shaft of which can be driven about its longitudinal axis, wherein the grinding tool includes a holder having a support for securing to the drive shaft of the oscillatory drive, and whereon a form profile with a grinding mechanism is provided, wherein the holder includes a profile support for releasable securement of the form profile, and wherein the profile support includes a clamping region, into which the form profile can be inserted with a holding section and can be fixed thereto, and which can be elastically enlarged for releasing the form profile.