Patent ID: 8021214

Claim:
A hand-held power tool, comprising a drive spindle ( 2 ) rotatable about a rotational axis (A) and provided at a free end thereof with a clamping flange ( 3 ) and a locking thread ( 4 ); a locking nut ( 7 ) having a clamping surface ( 6 ) and tightenable on the locking thread ( 4 ) for securing a disc-shaped tool ( 5 ) between the clamping flange ( 3 ) of the drive spindle ( 2 ) and the clamping surface ( 6 ) of the locking nut ( 7 ); and a safety spring ( 9 ) located between the disc-shaped tool ( 5 ) and an inner recess ( 8 ) formed in the clamping surface ( 6 ) of the locking nut ( 7 ), radially preloaded against the locking thread ( 4 ), and having at least one radial, outwardly projecting nose ( 10 ), the disc-shaped tool ( 5 ) having at least one, opening radially inwardly and axially extending groove ( 11 ) associated with the at least one nose ( 10 ) of the safety spring ( 9 ).