Anordning til reparation af revner

摘要

A pin (10) is provided for repairing cracks (C) in a material (M) such as iron casting materials. The pin includes threads (60) with both upper and lower surfaces wich angle toward a head of the pin. A tapping bit (550) is utilized in a hole (H) of similar diameter to the pin, positioned with half of the hole on each side of a crack, the bit creating threads in the hole which are substantially complemental to the threads of the pin. The pin includes a shoulder (40) which has a greater diameter than a diameter of the hole. When the pin is threaded into the hole, the shoulder abuts against a surface (S) of the cracked material causing the pin to cease translation into the material. Upon further rotation of the pin, the upwardly angled threads draw opposite sides of the crack towards each other.