Patent ID: 7905767

Claim:
A motorized power tool assembly, comprising an output shaft ( 11 ) including a tool receptacle ( 13 ) proceeding from a free end ( 12 ) of the output shaft ( 11 ) for receiving a disc-shaped tool ( 7 ) and having an outer thread with a constant outer diameter (D) and forming a first securing element ( 14 ) for locking means ( 8 ), and a centering section ( 16 ) adjoining the tool receptacle ( 13 ) and extending beyond a radial projection of the receptacle ( 13 ); a hollow cylindrical shaft extension ( 21 ) securable on the output shaft ( 11 ) and having a first guide section ( 22 ) abuttingly supportable on the centering section ( 16 ) of the output shaft ( 11 ) in a mounted condition of the shaft extension ( 21 ) on the output shaft ( 11 ) and a second guide section ( 26 ) adjoining the first guide section ( 22 ) and abuttingly supportable on the first securing element-forming outer thread; and attachment means ( 9 ) for securing the shaft extension ( 21 ) on the output shaft ( 11 ), the output shaft ( 11 ) having a second securing element ( 15 ) provided at the free end ( 12 ) of the output shaft ( 11 ) for receiving the attachment means ( 9 ).