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Precision engineering enables complex operations

In surgery, the use of precision engineering is becoming increasingly important. It aids the development of mechanisms with the highest precision to be used for complicated procedures to be carried out in safety. The excellent characteristics of Harmonic Drive ® Gears play an important role in the exceptional performance of these systems.

New high-tech implantation method

Deaf or people with profound hearing difficulties can be helped by a new implantation method even more in the future. They hearing aids are worn as usual over the ear, but a tuner and electrode is implanted directly into the cochlea. For this, the receiver needs to be milled and implanted directly into the skull. The cochlea must be accessed for the introduction of the electrode, all precision engineering on the base of the skull requiring the highest levels of accuracy.


The lightweight series

The CPL Series Component Sets, characterised by their low moment of inertia and lightweight design, are available in five sizes with gear ratios of 50, 80, 100, 120 and 160:1 offering repeatable peak torques from 18 to 372 Nm and a power density of up to 735 Nm/kg.

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Interdisciplinary practical cooperation

For the minimally invasive and precise implantation of these hearing aids a special surgical robotic system was developed in close cooperation with the ARTORG Center, University of Bern and NTB Buchs. The system works on the basis of three dimensional image data from which the robot can always adjust and move relative to the patient. The result is a highly precise surgical technique that is not feasible at the present time with any other technique.

Precision gears for pioneering surgical techniques

The five axes of the robot are designed to be technically similar and each contain Gear Units of Harmonic Drive AG. The hollow shaft of the backlash free and high precision gear offers a perfect way for the cable entry. A force sensor is integrated in the last axis, which permits tactile feedback control by monitoring the contact forces of the robot.