The present invention relates to a device for penetrating human nails as a part of treatment for Onychomycosis, commonly known as fungal nail. The device comprises a reusable electromechanical system and a single use cutting component. The electromechanical system incorporates an electrical motor and drive train to advance the cutting component through the nail. The electromechanical system also incorporates sensors for measuring the cutting resistance for the purpose of preventing the cutting device from overrunning into the nail bed. The device can be used to penetrate the nail in a controlled manner which will create a portal through the nail without penetrating the nail bed below the nail.