42Cr Mo Marine Stern Shaft
The marine stern shaft, also known as the propeller shaft, is a crucial component in a ship's propulsion system. It connects the ship's engine (or gearbox) to the propeller, transmitting the engine's power to drive the vessel forward or backward through the water.
The end radius of the stern shaft is small, and the side wall of the stern shaft can be equipped with chromium plating to improve the wear resistance.
This marine stern shaft is made from durable and high strength material 42Cr Mo, which is also called 42CrMo4+QT in German designation. The 42Cr Mo is alloyed structural steels that can be processed by heat treatment to be more robust.
The 42Cr Mo is compliance with standards GB 3077.
Overview
The end radius of the stern shaft is small, and the side wall of the stern shaft is provided with chrome plating layer and copper sliding bearing sleeve whose front end is provided with a skeleton oil seal. The outer seal of the skeleton oil seal is provided with a gland. A pressure plate is installed on the outside of the gland, and a rubber water seal ring is installed on the inner wall of the pressure plate.
The 42CrMo steel is ultra-high strength steel, with high strength and toughness. Its hardenability is also good, without obvious tempering brittleness. It has high fatigue limit and resistance to multiple shocks after tempering treatment, low temperature impact toughness is good.
Features:
Excellent mechanical performance
Good machinability
Good hardenability
Shock and corrosion resistant
Stable structure and uniform thickness
Good sealing effect
