In BRUCKNER solid carbide dead centres (forms V, GV, Z, GZ and HZ) with a carbide diameter of 20 to 45 mm the safety core sa•co^® is integrated. If there is a fissure in the joint between carbide and base material, e.g. caused by operating or handling errors, sa•co^® prevents the carbide point with the mounted workpiece from slipping. Thus high consequential costs are avoided.