SIDEPOWER - SLEIPNER PROPELLER NUT TEN01053

Function and technical context

The Sidepower - Sleipner propeller nut TEN01053 is the fastening element that retains the propeller on the bow or stern thruster shaft in the Sidepower and Sleipner maneuvering systems. It works within the auxiliary propulsion system—specifically in the thruster shaft and propeller assembly—and its correct tightening is essential for the propeller to transmit lateral thrust without clearance or vibrations. A failure in this nut, whether due to galvanic corrosion, loss of tightening torque or impact damage, can cause axial displacement of the propeller, total loss of maneuverability of the thruster and, in extreme cases, separation of the propeller inside the tunnel with structural damage to the boat.

When to replace this part?

The most common symptoms that indicate that the propeller nut should be inspected or replaced are: abnormal vibration during thruster operation, metallic noise in the propeller tunnel, loss of response or reduced lateral thrust, and presence of detectable play when moving the propeller manually with the equipment stopped. It is recommended to check the condition and tightening torque of the nut at each docking or seasonal maintenance, as continuous immersion in salt or brackish water accelerates thread corrosion. Preventively replacing the nut when it shows signs of corrosion, deformation or wear of the thread prevents a breakdown of the thruster during docking maneuvers, where the cost of afloat assistance far exceeds that of this part.

Compatibility table