Patent ID: 8182185

Claim:
A screw ( 11 ), comprising: a shaft ( 12 ) having an outer radial surface ( 14 ) and a free end region ( 15 ); at least one thread ( 21 ) arranged on the shaft ( 12 ), circumferentially surrounding the shaft ( 12 ) at least in some regions, and having a radial outer profile ( 23 ), two side flanks ( 24 ), a thread pilot ( 22 ) located in the free region ( 15 ) of the shaft ( 12 ), and a plurality of recesses ( 31 ) provided in the thread ( 21 ) and opening radially outwardly, the recesses ( 31 ) each having a first limiting wall ( 32 ) facing the thread pilot ( 22 ) and a second limiting wall ( 33 ) remote from the thread pilot ( 22 ); and a plurality of cutting bodies ( 26 ) formed of a material having a hardness greater than a hardness of the thread, located in the recesses ( 31 ) formed in the thread ( 21 ) and having each a longitudinal axis ( 27 ) and an outer surface ( 28 ) surrounding the axis ( 27 ) at a distance therefrom, the recesses ( 31 ) each having a trough-shaped bearing section ( 34 ) formed in the bottom of the recess and having a profile complementary to a profile of the outer surface of a respective cutting body for receiving and encasing, at least in some regions, the outer surface ( 28 ) of the respective cutting body ( 26 ), the trough-shaped bearing section having an axis oriented substantially in a direction of the thread ( 21 ).