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Abstract—Bone drilling operations are carried out in hospitals in different surgical operations worldwide. Such procedures are carried out by using a manual bone drill which is operated by the surgeon. This operation is very delicate, precise and requires high accuracy to drill until the specified depth is reached. This paper present a smart mechatronic tool for automatic bone drilling, where the linear movement and rotation of the drill bit are controlled. Breakthrough detection method and control algorithms are implemented to stop the drilling procedure upon penetration of bone. Finally, validation and testing of the prototype have been carried out.