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Introduction to Maritime Bearings and Lubrication

Learn about the introductory aspect of bearings and lubrications in the maritime sector in this free online course.

Publisher: ADU
This free online introductory course on Maritime Bearings and Lubrication guides you through the purpose of using bearings on shipboard machinery. Learn about different types of anti-friction bearings that are used onboard ships, the differences between the ball and roller bearings, along with their respective applications. By the end of this course, you will become much more familiar with the application of journal bearings for shipboard use.
Introduction to Maritime Bearings and Lubrication
  • Duration

    1.5-3 Hours
  • Students

  • Accreditation






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Bearing is defined as a friction-reducing machine element. This free online course begins by explaining how bearing supports and aligns the rotating parts of the shipboard machinery. Introduction to Maritime Bearings and Lubrication describes the location of bearings on both sides (drive & non-drive end) of the pump and motor shafts. You will be introduced to the larger journal and cross-head bearings for heavy and high torque machinery. The course also discusses the most common bearings on board including relatively smaller sized ball and roller bearings. You will learn how bearings are identified from the numbers written on them. The largest and the highest speed ball bearings are used on turbochargers and they are usually oil lubricated. This course then takes us through the process behind smaller and lower speed bearings that are common around the machinery space. This course goes on to explain how bearings are used to help reduce friction. Metal-upon-metal contact produces large amounts of friction. The friction adds to wear and tear of the metal, producing grinding that slowly degrades the metal. You will learn how bearings reduce friction by having the two surfaces roll over each other, reducing the amount of friction produced.

Next, you will analyze how antifriction bearings are subdivided into balls and roller bearings. You will learn about the components of antifriction bearings including a smooth metal ball or roller that rolls against a smooth inner and outer metal surface. You will learn how the rollers or balls take the load, allowing the device to spin. You will be taken through the principle behind rollers and balls in terms of reduction in friction. The course then describes the impact of having a tightly fixed polished bearing sleeve on the rotating machine. You will learn about ball bearings being better suited for high-speed movement while roller bearings have the advantage of taking on a higher load. In this course, great detail is put into the concept of radial or thrust load. Depending on the location of the bearing in a system, it can see all of a radial, or thrust load, or a combination of both. This course describes how bearings in the pumps support a radial and a thrust load. The course then takes a look at the technique by which the weight of the horizontal pump on bearings produces a radial load while the thrust load may be produced as fluid moves axially or in other directions through the pump.

Next, you shall discuss some common types of bearings used on board. You will learn about the advantages and disadvantages of rolling contact (antifriction) bearings. You will learn quite a lot on ball bearings as being the most common type of bearing and how it handles both radial and thrust loads. Ball bearings are also known as deep-groove single-row bearings. The course describes the types of roller bearings, including the straight roller bearings, tapered roller bearings, spherical roller bearings, and needle roller bearings. The course takes you through the bearing number identification and lubrication by grease which may prove more desirable than lubrication by oil under certain conditions. Finally, the course describes friction bearings as journal bearings. You will be taken through the main types of sliding contact bearings. You will learn about general bearing design criteria and how journal bearings are used with main diesel engines. If you are a student or a professional with interest in mechanical engineering as it relates to the shipping system, then you should start this free online course today to gain more insight into the internal workings of the ship system.

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