Actuator (1) for a medical device (100), comprising an electromotor, a mechanical transmission, and magnetic coupling means arranged for transmitting a mechanical torque from the electromotor to the mechanical transmission when said electromotor is powered by an energy source, wherein said electromotor and a first part of the magnetic coupling means kinematically linked to the electromotor are arranged and hermetically sealed in a first casing module, and wherein said mechanical transmission and a second part of the coupling means kinematically linked to said mechanical transmission are arranged in a second casing module, said first and second casing modules comprising each complementary fastening means such that said first and second casing modules can be removably connected to each other in such a way that said first and second parts of the magnetic coupling means magnetically couple together upon connection of said first and second casing modules.本發明揭示一種用於一醫療裝置(100)之致動器(1)，其包括一電動機、一機械傳動裝置及磁性耦合構件，該磁性耦合構件經配置以在該電動機由一能源供電時將一機械轉矩自該電動機傳輸至該機械傳動裝置，其中該電動機及運動地連結至該電動機之該磁性耦合構件之一第一部分配置且氣密地密封於一第一殼體模組中，且其中該機械傳動裝置及運動地連結至該機械傳動裝置之該耦合構件之一第二部分配置於一第二殼體模組中，該第一殼體模組及該第二殼體模組各包括互補緊固構件，使得該第一殼體模組及該第二殼體模組可依使得該磁性耦合構件之該第一部分及該第二部分在連接該第一殼體模組及該第二殼體模組之後磁性耦合在一起之一方式彼此可移除地連接。
