Marine Shafting System

The stern shaft materials have passed EN10204-3.1 certification, covering various grades of: low carbon steel, alloy steel, stainless steel, ductile iron, aluminum alloy, copper alloy, titanium alloy.
The main processes are: free forging, die forging, rolling ring, high pressure casting, centrifugal casting, normalizing, quenching and tempering, solution treatment, aging treatment, carbonitriding, turning, milling, drilling, grinding, hobbing, high frequency quenching, galvanizing, chrome plating, anodizing, powder spraying and other processes.
The propeller shafts length: Max 16000mm,max dimeter is 500mm, single piece weight: Max 16 Tons, at the same time we are good at terminal machining of complex products, dimension accuracy: Min 0.01mm, roughness: Min Ra0.6.

Bronze rubber bearing, bronze rubber bush for water lubricant for marine industry.Naval brass rubber bush adapt equally well to strut and stern tube mounts. And are often used effectively as rudder-stock and pintle bushings. Bearing diameters are precision fitted to the designated shaft size with the correct clearance for efficent water lubrication.
External brass shells are machined and polished to provide easy fitting. Specially formulated oil and chemical resistant ntrile rubber is securely bonded to the shell. Unit with thin shells are available for the struts of small craft. Sleeve bearings are usually installed by light press-fitting and locked in place with once pointed set screws.

The intermediate shaft, covering various grades of: low carbon steel, alloy steel, stainless steel, ductile iron, aluminum alloy, copper alloy, titanium alloy.
The main processes are: free forging, die forging, rolling ring, high pressure casting, centrifugal casting, normalizing, quenching and tempering, solution treatment, aging treatment, carbonitriding, turning, milling, drilling, grinding, hobbing, high frequency quenching, galvanizing, chrome plating, anodizing, powder spraying and other processes.
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Stern Tube for Ship/ Ship Stern Tube/ Marine Stern Tube for Sale
The marine shaft system is a main part of the steering system for vessels. The whole shaft system includes propeller, stern tube, bearing, hydraulic coupling, middle bearing, hydraulic nut, nozzle, stern tube seal, ,tail shaft, etc.
There are two kinds of lubrication systems for the stern tube: water lubrication and oil lubrication
For water lubricated bearing not less than 4 x the diameter of the steel shaft. If the bearing is over 380mm diameter forced water lubrication must be used, a circulating pump or other source with water flow indicator.

The shaft coupling is the component which joins the propeller shaft to the gearbox output flange. Some are bolted directly to the gearbox but many installers use a flexible couple, such as R&D flexible couplings, which would then bolt to the gearbox. Our range includes couplings for most popular transmission types, bored for imperial or metric shafts.
Besides the standard coupling, the Solid Half Coupling, Clamp on or Split Half Coupling, Bobbin Coupling and Coupling Adapters are also available.

Kort nozzles or ducted propellers can be significantly more efficient than unducted propellers at low speeds, producing greater thrust in a smaller package. Kort nozzles may be fixed, with directional control coming from a rudder set in the water flow, or pivoting, where their flow controls the vessel's steering

The propeller shaft bearing is applied in stern fin and intermediate shaft bearing of all kinds of ships,whose materials have commonalities of all the gilding bearing and are applied in all the open lubricating systems and closed lubricating systems.It is a polymer material, as the differences of using fields and lubricating mediums,multi-copolymer can meet.
Material propeller shaft bearing: high polymer material, rubber
Dimensions: designed according to the shaft.

A stuffing box is an assembly which is used to house a gland seal. It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine elements.

The shaft coupling is the component which joins the propeller shaft to the gearbox output flange. Some are bolted directly to the gearbox but many installers use a flexible couple, such as R&D flexible couplings, which would then bolt to the gearbox. Our range includes couplings for most popular transmission types, bored for imperial or metric shafts.
Besides the standard coupling, the Solid Half Coupling, Clamp on or Split Half Coupling, Bobbin Coupling and Coupling Adapters are also available.
Material: carbon steel, stainless steel
Processing methods: forged and lathe machining
Dimensions: designed according to the shaft and gearbox.