and the tool retaining screws and not by the tool itself. This causes an erosion and the subsequent rupture of the tip. The breaking in these cases usually appears at the top of the hammer pin as a result of the idle strokes when the tip of the tool is separated from the rest

hammer as a lever sooner or later it will break. The same thing occurs when the tool leans incorrectly or when it is introduced continuously between cracks. LOW TEMPERATURES. At low temperatures it is recommended that the tools be heated before use and if it is possible use at low speed for

LOW TEMPERATURES At low temperatures it is recommended that the tools be heated before use and if it is possible use at low speed for a progressive increase in temperature of the machinery.