Friction is a force that resists relative motion between two surfaces in contact. Friction can be beneficial, such as when attempting to plant your feet to move a heavy object. However, friction in rotating equipment can be detrimental. Excessive friction causes premature wear and generates heat, which results in wasted energy.
In this course, the student will learn the basics of friction and wear and how lubrication is used to reduce friction in common applications. The course will cover Chapter 2, "Lubrication Principles" in the US Army Corps of Engineers document EM 1110-2-1424, "Lubricants and Hydraulic Fluids".
The student must take a multiple-choice quiz consisting of ten questions at the end of this course to obtain PDH credits.
Specific Knowledge or Skill Obtained
This course teaches the following specific knowledge and skills:
- Fundamentals of friction, including the laws of friction for sliding, rolling and lubricated surfaces
- Differences between static and kinetic friction and the relationship between friction, pressure and velocity
- Types of wear including abrasive, adhesive, pitting and corrosive
- Boundary lubrication and the use of antiwear agents.
- Principles of hydrodynamic lubrication applied to thrust bearings and journal bearings
- The use of extreme pressure lubricants
- Principles of elastohydrodynamic lubrication
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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