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Fundamentals of Gear Design


Develop your understanding of the history, basic gear tooth nomenclature, types of gears, gear arrangements, theory of gear tooth action, and failure modes and prevention. This course was recently updated and expanded to comprehensively cover important topics relating to gear system design consideration.


1.1       Introduction - A brief introduction of the material to be presented and its relation to the overall two part Fundamentals of Gear Design Seminar Pair is discussed.

1.2       History - A short chronology of the development of gear technology and its role in man's development through the ages is covered in capsule form.

1.3       Basic Gear Tooth Nomenclature - In order to facilitate the discussion of gear technology, a brief presentation of the terminology and nomenclature unique to gearing will be presented. This presentation will include both geometric definitions and an overview of the major gear related terms used in the remainder of the presentation.

1.4       Types of Gears - The major types of gears, their uses and limitations, and the relative advantages of each are discussed. The types of gears are divided into three classifications based on the relation of their axes: parallel, coplanar intersecting and non-coplanar nonintersecting. Special noncircular gear types are also covered.

1.5       Gear Arrangements - In order to better understand the functioning of gears within an overall drive system, a broad review of the manner in which gears may be used in specific types of drives, including simple reductions, epicyclic configurations, Harmonic Drives, etc. will be presented in a qualitative manner with illustrative examples.

1.6       Theory of Gear Tooth Action - Geometry and kinematic concepts for simple parallel axes gears are developed from basic theory in order to provide a foundation for the study of more complex gear types. Concepts including speed ratio equation development, sliding and rolling velocities, approach and recess action, basic involute geometry, backlash and tooth thickness relations, contact ratio, limits of contact, the Law of Conjugate Motion, and other topics are derived and presented. All parameters discussed are fully derived and not simply presented as end results.

1.7       Failure Modes & Prevention - Only by thoroughly understanding the manner in which gears can fail under a wide variety of operating conditions can the designer guard against such failures. A very extensive discussion of all common and many unusual types of failures, their causes, and methods available to prevent them both in the design and hardware stages is presented. The presentation is organized into nine main classifications. The overall phenomena that define each group are described in general and specific sub cases of each group are presented. Excellent photographs illustrate each concept and the instructor's wide experience is brought into play in the form of detailed discussions of specific failure investigations to further emphasize many of the modes discussed. Many hardware samples are used to illustrate the various failure modes.

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Benefits and Learning Outcomes

  • Build your knowledge of modern gear system design and analysis
  • Be able to distinguish between types of gears and gear arrangements
  • Discuss theory of gear tooth action, and derive parameters as they're presented

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This program can be applied toward the:

A knowledge of geometry, trigonometry, and elementary algebra is required. Basic strength of materials is helpful but not essential.
Tue.-Thu. Mar. 15-17, 2016
Location: UWM School of Continuing Education (Click link for directions)
Instructor: Raymond J. Drago, P.E., Adjunct Instructor
$1095: Register by Fri., Jan. 15, 2016
$1195: Register on or after Sat., Jan. 16, 2016 Discount Available
CEUs: 2.0/PDHs: 20
Enrollment Limit: 40
Program No. 4810-8387
Registration Deadline: Tue., Mar. 15, 2016
Register Now
  Related Courses  
PC Applications in Parallel Axis Gear System Design and Analysis
Advanced Gear Design and Theory
For more information, contact:
Marcia Gabriel,, 414-227-3378
Murali Vedula,, 414-227-3121


Gear Technology Certificate
Congratulations to

Brendan Bijonowski

Bradley Carlson

Jim Evanoff

Dan King

Bill Leffert

Chris Pluta

Nick Tiamson

Paul Walsh

for receiving UWM's Gear Technology Certificate in August 2013.