Rubber covering on protecting propeller shaft from sea-water corrosion is made in our factory, in accordance with Machinery Rule of Ship Safety Law issued by Ministry of Land, Infrastructure and Transport.Rubber covering shall be tough in full and never broken away from shaft, enough to be strong against elasticity of the shaft by temperature fluctuation and torsion of the shaft by turning torque.Features of our rubber covering on propeller shaftA.Construction:Interposition of ebonite layer between shaft O.D. And covering rubber, for reinforcing adhesive strength.B.Quality Assurance:Full attention is paid to Quality control, based on many of our past experiences.As a result, our rubber covering on propeller shaft is well accepted by the customers to be trustworthy.PURPOSE. In general, water lubricated rubber bearings are used in propulsion system for middle or small ships and the material of propeller shaft is of carbon steel.Although the contact parts of the shaft with bearings are protected by bronze sleeve of anti-corrosive alloy, it is obliged by Ship Safety Law of Japanese Government that the remaining parts shall be covered by rubber lining or other coating, for protecting shaft from sea water corrosion.Carbon steel propeller shaft is to be protected from invasion of seawater. Our rubber covering job are evaluated by the customers to be reliable, viewing our many experiences of 40 years more.FEATURES.
Replace Cutless Propeller Shaft Bearing: When 1/2 of water V groove has been worn away. Another indicator is when shaft feels loose in the bearing. Bearings Tolerances: The following are the standards established by the US Navy, according to BuShips plan number 8: How to Install and Modify a Cutless Propeller Shaft Bearing. In general, water lubricated rubber bearings are used in propulsion system for middle or small ships and the material of propeller shaft is of carbon steel.Although the contact parts of the shaft with bearings are protected by bronze sleeve of anti-corrosive alloy, it is obliged by Ship Safety Law of Japanese Government that the remaining parts shall be covered by rubber lining or other.
Rubber Design has developed a compact range of thrust blocks in combination with their ERD Marine Couplings for high performance operation in yachts and ships.The advantage of using a thrust block is that the propeller thrust load is not taken by the engine-gearbox. This way an optimised flexible mounting system of engine-gearbox can be used, which gives the best results for vibration isolation and reduction of structure borne noise from engine-gearbox to the foundation (hull of the ship). Structure borne noise is transmitted quickly through the hull and causes disturbing noise (resonance) in areas outside of the engine room, this can cause problems or discomfort.To obtain the best results in the reduction of structure borne noise, the thrust block has a further option to be flexible mounted with a minimum deflection in the longitudinal direction. An advantage of using the ERD marine coupling is that torsional vibrations and noise transmission from the engine-gearbox to the thrust block is reduced.
During assembly the thrust shaft is accurately aligned and fixed with transit bolts before dispatching to the customer. Due to this fixture and the four alignment bolts it is a very easy process to achieve an accurate alignment with the propeller shaft.CAD drawings (2D/3D) of the thrust blocks and ERD marine couplings are available in different formats so that this geometry can be easily imported into the CAD drawing of the complete propeller shaft installation.
All thrust blocks and ERD marine couplings can be delivered with the required classification approval.