Patent ID: 7097548

Claim:
An insertable tool, comprising: a rotationally driven disk-shaped hub ( 10 , 12 ), wherein a grinding means ( 14 ) is secured on one side in a radially outer region of said rotationally driven disc-shaped hub ( 10 , 12 ), wherein the hub ( 10 , 12 ) has means ( 16 , 18 , 20 ) for adapting a flexural strength of the hub ( 10 , 12 ) to a flexural strength of the grinding means ( 14 ), wherein the hub ( 10 , 12 ) is formed of sheet metal, and wherein in the radially outer region of the hub ( 10 , 12 ) recesses ( 16 , 18 , 20 ) are made, for adapting the flexural strength, at least some of said recesses ( 16 , 18 , 20 ) being open radially outwardly and being void of any material of the grinding means ( 14 ) within a width of said recesses ( 16 , 18 , 20 ), said recesses being covered in an axial direction bit at least one layer ( 22 , 24 ) of the grinding means ( 14 ).