**Turning Brake Drums (updated) By Eli Jaramillo



Overview: At the end of this lesson, students will know how to determine if a vehicle brake drum should be turned or replaced and the steps necessry to safely and accurately turn (resurface) brake drums as needed.

Details: This is a two-hour lesson in which students will learn how to use a brake drum lathe to turn brake drums. The goal: Instruct students on the importance of proper diagnostics, measurements, and equipment usage for fixed-right first-time and best customer satisfaction.

Understanding the proper use of a brake drum lathe is still a viable skill set needed by the professional technician. This lesson will cover all aspects of this task. Additionally, ASE test-preparation tasks will be emphasized during this lesson.

Industries / Subjects / Grades

Industries / Pathways
  • Transportation Transportation
Grade Levels
  • 9
  • 10
  • 11
  • 12
  • Adult

Standards and Objectives


California Academic Content Standards (2)
California's 2008 CTE Standards (8)

Related Instructional Objectives (SWBAT...)

  • Students will use the brake drum micrometer and critical thinking skills on a brake drum to interpret the results of their findings: "go" or "no-go".
  • Students will use both metric and US standard measuring systems when performing measurements on brake drums.
  • Students will understand how to find brake drum limit specifications using the following sources: 1) Specifications cast or imprinted on the brake drum. 2) Online or printed service and repair information.
  • Students will follow proper procedures when setting up and adjusting a brake drum lathe.
  • Students will use the brake drum lathe to accurately turn and create a proper finish in a brake drum.
  • Students will be taught the advantages and importance of ASE certification for brake technicians.

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