AT Series (Azimuth Thruster)

An azimuth thruster designed for medium to large vessels, the ZF Marine AT Series (Azimuth Thruster) offers a robust and reliable solution for maneuvering and propulsion. With a thrust capacity ranging from 50 to 2,000 kN, this series is available in three variants: AT 3011, AT 4111, and AT 5111, each catering to different power requirements from 200 to 2,000 kW. The thrusters feature a diesel-mechanical drive type, integrating an L-drive gearbox with a fixed-pitch (FP) propeller and ZF gearbox for efficient performance. Common issues that may arise include wear on the L-drive lower gear bearing, seawater ingress through the propeller shaft seal, and failure of the steering hydraulic cylinder seals. To ensure optimal operation, it is recommended to conduct gear oil analysis every 1,000 hours and inspect the shaft seal during drydock. ZF Marine, with facilities in Padova, Italy, and Friedrichshafen, Germany, provides spare parts with a lead time of 3-6 weeks. Additionally, the company’s global service network supports gearbox overhauls and other maintenance needs, ensuring that the AT Series (Azimuth Thruster) remains a dependable choice for vessel operators.