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Diploma in Maritime Bearings and Lubrication

Learn about the principles and types of lubrication used in bearings and lubrication in this free online course.

Publisher: ADU
This free online course on Maritime Lubrication and Bearing explains in great detail the different types of bearings. The course describes how various types of bearings use solid and liquid lubrication to stay functional. Pumps and motors use simple ball bearings and bigger pumping units which may use double-ball to take up hydraulic thrusts. By the end of this course, you will become better acquainted with maritime lubrication and bearings.
Diploma in Maritime Bearings and Lubrication
  • Duration

    10-15 Hours
  • Students

  • Accreditation






View course modules


Bearings and Lubricants are essential aspects of the ship onboarding system. For gearing with axial and out-of-balance forces, it might be good to use conical roller bearing. The turbocharger is the most important of the roller bearings used on ships because of high speed and alignment issues related to turbochargers. The gearboxes using epicyclic gearing will also have advanced roller type sleeve bearings. The course covers from small to bigger bearings, such as used in large slow-speed diesel propulsion engines. The lubrication of bearings involves both solid and liquid lubrication starting with grease to lube oil. We need to understand their properties and be familiar with various types of lubrication systems and their principles of operations. The various diesel engines use different types of lubrication systems and have different layouts for piping, pumps, filters, purifiers, etc., to keep the lubrication system healthy at all times, under operation or when engines are stopped. From summer to winter climate and sea conditions, the purity of the oil under circulation has to be maintained by the purification system. Ill-treatment of lube oil means death and destruction of the engine, leading to serious and fatal accidents on board ships.

The course begins by explaining the principles and types of lubrication used in bearings. You will discuss the application of roller, ball bearings and their lubrication needs using grease or solid lubricants. The course defines bearing as a friction-reducing machine element. Bearing also supports and aligns the rotating parts of machines. Bearings are usually located on both sides (drive & non-drive end) of the pump and motor shafts inside bearing housings. Other than the larger journal and cross-head bearings for heavy and high torque machinery, the most common bearings on board are relatively smaller sized ball and roller bearings. They can be identified from the numbers written on them. You will be taken through the various types of lubrication systems employed on main and auxiliary diesel engines. Bearings are particularly important in their use on shipboard machinery. A journal bearing is essentially a cylindrical shaft in a cylindrical cavity of larger diameter and the space between them contains a liquid lubricant. This course does a great deal of job in explaining the application of journal bearings for shipboard use and the various types of sliding contact or friction bearings. 

This course then discusses the types of lube oils that need to be selected for use in marine diesel engines and the type of lube oil systems used for the propulsion engines. You will learn about the cylinder lubrication system used for propulsion engines, the lube oil system for a 4-stroke diesel, and the splash type lubrication for trunk type engines. It is very important to understand the lube oil properties essential for lubrication. This course takes you through the categorization of lube oils used onboard and the principles governing various types of lubrication. Lubricating oils are designed to perform multiple tasks. A modern engine lubricating oil, apart from keeping the engine parts moving freely, is expected to withstand high temperatures without carbonizing, neutralize acidic combustion products, keep the engine clean and prevent corrosion. This is achieved by blending oils and adding additives. This course explains in great detail the huge importance of additives in the modern-day engine. If you are an engineering professional with an interest in the mechanical field, then this free online course from Alison will be a great fit for you.

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