To achieve maximum performance, the correct number of bearings and subsequent spacing is imperative. When installed properly and systematically maintained, bearings keep the vessel running smoothly while limiting any wear and tear on machinery.
Polymer, composite, and rubber sleeve bearings with non-metallic outer shells are ideal wherever corrosion, electrolysis, or a combination of metals may be a concern (i.e., when you have a steel or aluminum stern tube). Water-lubricated rubber sleeve bearings can have a metallic or non-metallic outer shell, chosen based on the vessel’s needs. Bearings are designed with flutes and valleys that channel water flow, flushing away grit that can erode the shaft. There are several types of marine shaft bearings, the most popular of which are water-lubricated, made of rubber, polymer, or a composite material.
To achieve these results, the correct type of bearings must be chosen, properly installed, and regularly maintained. For vessel owners, this extends the lifespan and lowers maintenance costs. Bearings are designed to hold a vessel’s running gear in position while reducing friction on the propeller shaft.
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