Overview
Grease is used for lubrication of contact surfaces where it is not practical or convenient to use oil. Grease is typically used for applications where its consistency allows it to remain in place, whereas oil would seep away. An example is machinery that is run intermittently or is placed in storage for long periods of time. Grease is also used where it is difficult or inconvenient to access for frequent oil lubrication, such as sealed-for-life electrical motor bearings. As with other lubricants, improper selection of grease for an application can lead to inadequate machinery performance and premature wear and failure of components.
In this course, the student will study the basics of grease selection. The course will cover Chapter 5, "Grease" 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:
- Function and applications for grease, as well as the relative merits of grease and lubricating oils
- Characteristics of grease including consistency, apparent viscosity, corrosion resistance, rust resistance, dropping point, shear stability, oxidation stability and texture
- Effects of temperature and pressure on grease
- Composition and characteristics of complex soap grease
- Types of commonly used greases and their characteristics and typical applications
- Fluid lubricants and types of thickeners used in grease
- ASTM testing methods for grease characteristics
Course
Click on the following link to the PDF document to review the course material before taking the quiz for credit.
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