205-01 - Introduction to Gear Drives

205-01 - Introduction to Gear Drives

Learning objectives

  • Describe and explain the function of a gear
  • Define the following: tooth, pitch, pitch circle, pitch diameter, circular pitch, diametral pitch, outside diameter, root circle, addendum, dedendum, clearance, whole depth, working depth, flank of the tooth, face of the tooth, fillet, face width, backlash, pressure angle, top land, bottom land, crown, gear-tooth ratio, and gear hardness

Course overview

A gear is a main component of a gear drive system. The Introduction to Gear Drives training course explains a gear and the common terms associated with different gear designs.

This online course describes the function of a gear and defines common terms used. It also covers gear hardiness. This course is part of the Gear Maintenance training series.


The individuals involved in the development and promotion of this course do not receive any compensation or financial benefits outside of their regular employment for their work on this course.


  • 50 minutes
  • Format: Online Interactive
  • English
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