Disc for power tools for supporting abrasive material and abrasive disc comprising said support

Abstract

A disc for power tools for supporting abrasive material includes a relief around the central hole and from the rear part of the disc, in a single body with the body of the disc itself. The relief has a height such as to act as a containment of at least part of the central thread of the hole and/or spacer for the shaft or pin of the power tool.

1 . Disc ( 1 ) for power tools, for aiding and supporting abrasive material associable with a front peripheral surface (S 1 ) of annular conformation; the disc ( 1 ) comprising a body ( 6 ) which has a relief ( 7 ) projecting from a first face ( 4 ) of the disc ( 1 ) and in which said relief ( 7 ) is a single body with the body ( 6 ) of the disc ( 1 ); the portion ( 7 ) is extended around a central hole ( 2 ); the length of said relief is such to be able to contain a corresponding threaded shaft within the surface (P 2 ) for supporting the abrasive material; characterized in that
 a. the relief ( 7 ) has a diameter (D 3 ) adjacent which a planar and annular surface ( 13 ) lies comprised between the diameter (D 1 ) and a diameter (D 2 ); said surface ( 13 ) serving to receive labels and/or silk-screen prints; on the outside, a surface portion comprised between the diameter (D 3 ) and the diameter (D 2 ) has an annular surface ( 14 ) made of a plurality of cavities ( 15 ) for lightening the body ( 6 ),   b. it comprises an annular peripheral portion ( 16 ) comprising fins or ribs ( 17 ) spaced by cavities ( 18 ) opening on the peripheral portion itself.   c. a plurality of radially or helicoidally arranged septa ( 20 ) depart from the portion surrounding the hole and are joined to the annular portion (S 1 ) for supporting the cloth; said septa ( 20 ) are arranged inside the recess ( 19 ) of the disc ( 1 ).   
     
     
         2 . Disc for power tools according to  claim 1 , characterized in that the relief ( 7 ), or projection, is extended from the body ( 6 ) and serves as a spacer element for the power tool in the operative configuration, that is to say fitted in a corresponding shaft or pin thereof. 
     
     
         3 . Disc for power tools according to  claim 1 , characterized in that the relief ( 7 ) can be threaded, partially threaded or not threaded. 
     
     
         4 . Disc for power tools according to  claim 1 , characterized in that the relief ( 7 ) has an at least partially cylindrical and/or elliptical and/or polygonal geometry. 
     
     
         5 . Disc for power tools according to  claim 1 , characterized in that if ( 9 ) designates the length of the thread ( 3 ) obtained on the central hole ( 2 ), at least one portion ( 10 ) of said length ( 9 ) is beyond the plane (P 1 ) of the face ( 4 ) facing the power tool, in operative configurations. 
     
     
         6 . Abrasive disc comprising a discoid support element ( 1 ) according to  claim 1  and an abrasive means associated to said element ( 1 ).