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Mikasa Industry

Monday, March 27, 2017
 JAPANESE |  ENGLISH

RUBBER COVERING ON PROPELLER SHAFT

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.

PROPELLER SHAFT
Features of our rubber covering on propeller shaft
A. 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

Our rubber covering consists of two layers mentioned below:
A. Adhesive layer :
Hard rubber called Ebonite, having superior waterproof, not to allow seawater penetration into the shaft.
B. Surface layers :
Natural rubber sheets with 2.5mm thick are wound on Ebonite surface by 3 layers, which absorb the external heavy shock, and protect the shaft completely from seawater invasion.
Our rubber covering is having enough adhesive strength and flexibility to stand for deflection or torsion of the shaft in the navigation.
FEATURES IMAGE
Physical Property Surface Rubber Ebonite
Tensile Strength N/cm2 1760 4410
Elongation % 420 6
Hardness JIS-A 72 Shore D: 82
Adhesive Strength N/cm2 - 1760

CUSTOMERS; KIND OF VESSEL

Ferry Boats, Navy destroyers, Submarines, Ice Breakers, Patrol Boats (Coast Guard), Tug Boats, pushers, Fishing Boats, Cargo Boats etc.
PDF NIPPON KAIJI KYOKAI

CERTIFICATION OF APPROVAL FOR RUBBER-BINDING AROUND SHAFTS
[PDF file]  [JPEG file]

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