Patent ID: 7930844

Claim:
A wearing part having improved abrasion resistance and strength, which wearing part comprises at least a first and a second material part, which first material part is constituted by a casting body of a casting alloy, which casting body comprises: a rear fixing part for detachable fixing to a holder part in a working tool and in which working tool the wearing part constitutes an exchangeable consumable part, and also a front neck, projecting from and at an angle to the longitudinal axis through the rear fixing part, which projecting front neck has an outer tip, having at least one tip wearing surface placed outermost on the said outer tip and which tip wearing surface constitutes the part which is to work actively against a working surface, the said projecting neck being worn down starting from the at least one tip wearing surface at the said outer tip, wherein the second material part is comprised of at least one elongated hard metal rod, which at least one elongated hard metal rod is fixed in the longitudinal plane of symmetry of the wearing part, substantially axially inside the projecting neck of the first material part, which at least one elongated hard metal rod comprises at least one free rod wearing surface constituting a part of the larger tip wearing surface of the said outer tip, whilst all other sides of the at least one elongated hard metal rod(s) are enclosed and fixed in place by the said first material part, wherein the at least one elongated hard metal rod of the wearing part is arranged with its centre in the force-neutral zone of the projecting neck, substantially concentrically in the longitudinal axis of the projecting neck, and comprises a length which is shorter than the length of the projecting neck with an inner cast-in end distinctly terminated at a certain distance from the longitudinal axis of the rear fixing part, so as to produce an auto signal comprising registerable vibrations at the final wearing-away of the inner cast-in end and by that an auto-reporting function that a change of wearing part is required during operation.