TAKANO Bi-stable Rotary solenoids apply cylindrical permanent magnet for rotor. Rotary motion is performed by attraction and dis-attraction of magnetic pole generated by rotor and yoke. TAKANO Solenoid makes direct rotary motion without any axial movement, which contributes to the durability of this product. It differs from the conventional rotary solenoid which generate mechanical axial motion and change the axial motion to rotary motion.