An important difference between the bar drawing and wire drawing is that the bars must remain straight. The length of the bar which can be drawn is limited by the maximum travel of the carriage, which may be from 50 to 100 ft. The first operation, preliminary to drawing is the pointing of the bars by rotary swaging or hammer. After the pointed end is inserted through the die and gripped by the jaws of the carriage, the hook is lowered to engage the moving chain.
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