This packet of five learning modules on machine components is one of 20 such packets developed for apprenticeship training for stationary engineers. Introductory materials are a complete listing of all available modules and a supplementary reference list. Each module contains some or all of these components: goal, performance indicators, statement of purpose, objectives, learning activities (activities the student is expected to perform and their purpose), information summary, information sheets, worksheets, self-test, self-test answers, posttest, and posttest answers. The five training modules cover shafts, bearings, seals and gaskets, chain shafts, and belts and pulleys. (YLB)