This paper investigates using a thermosyphon in the center of a drill to move the heat generated at the cutting tip to the drill chuck in an effort to reduce the temperature at the drill tip. This study compared the heat transfer performance of a drill with a thermosyphon to the performance of a solid drill and a drill with a heat pipe under simulated drilling conditions. Results show that when using a drill with a thermosyphon the temperature of the drill tip was almost 60% lower than a solid drill for 45 and 55 volts and 37% lower for 35 volts. Compared to a drill with a heat pipe the maximum temperatures were reduced 18% to 36%. It was also shown that higher speed has an adverse effect on the operation of the thermosyphon, but in the worst case, the temperature increased by only 16%.

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