The ZF-Servoplan planetary gearbox series has been designed for direct mounting onto servomotors. The available wide range of sizes and the use of a modular system allows the application in almost any field of automation.
The combination of servomotors with ZF Servoplan planetary gearboxes constitutes a coaxial drive unit. The servomotor output shaft is connected to the sun gear of the gearbox by using a clamping coupling. The sun gear drives three planetary gears inside the planetary carrier, which rotate inside the internal ring gear. Since the power is distributed to three planetary gears,
thereby distributing the forces evenly, this allows a very compact design with high power density.