Retractable Azimuth Thruster · Bow/Stern Thrusters
Marine vessels often employ retractable bow thrusters to enhance maneuverability in tight spaces and during berthing operations. The Wartsila Steerprop Thruster 3500kW bow is a powerful unit designed to deliver a thrust of 455 kN, making it suitable for larger ships requiring significant propulsion assistance. With a diameter of 2850 mm, this thruster is part of the WST-R product line, which covers power ranges from 750 kW to 6500 kW. The thruster is retractable and can be mounted at the bow, providing flexibility in operation and maintenance. It features a 8-degree propeller gear angle for improved efficiency, and its hydraulic system includes fine filtration to extend bearing life. The Sternguard In-Water Serviceable Seal allows for complete underwater serviceability, simplifying maintenance tasks. Regular inspections and overhauls are recommended every five years or after 40,000 to 56,000 hours of operation, with full overhauls every ten years. Common areas for inspection include propeller blades, blade foot seals, shaft seals, roller bearings, and the hydraulic system, each critical for maintaining the thruster's operational integrity.
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