Gage Training
Outline

Course outline

Unit 1  Gage Primer

Lesson 1
Why
Measure? 
 Understand the three main reasons why parts are
measured.
 Explain the five critical aspects of measuring.

Lesson 2
Language of Measurement 
 Use the language of dimensional measurement.
 Convert English to SI (metric) units of measure and SI
to English units.
 Understand basic terminology used on drawings and
blueprint.

Lesson 3
Measurement
Standards 
 Explain the role of standards in the dimensional measurement field.
 Follow the traceability trail of calibration standards.

Lesson 4
Precision & Accuracy 
 Explain common sources of measurement error.
 Understand the impact of the five categories of measurement error:
accuracy, repeatability, reproducibility, stability, and linearity.

Lesson 5
Datums 
 Use a datum to locate the position of part features.
 Identify datum planes, datum points, and datum axis.

Lesson
6
Introduction to
GD&T 
 Explain the differences between coordinate tolerancing and geometric
dimensioning and tolerancing.
 Interpret feature control frames.
 Use the 14 geometric characteristic controls.
 Identify GD&T modifying symbols.

Lesson 7
Surface Finishes 
 Characterize the finish of a surface.
 Identify the five most common types of surface deviations.
 Use surface symbols to communicate machining instructions.

Lesson 8
Math
for Measuring 
 Add and subtract fractions.
 Convert fractions to decimals.
 Calculate the perimeter and area of rectangular shapes and the
circumference and area of circular shapes.

Unit Test
Challenge

An assessment of the learner’s progress in this unit. 
Unit 2  Using Gages

Lesson 1
Types of Gages 

Explain the differences
between direct and transfer measurement gages.

Identify the line of
measurement.

Apply the 10times rule of
measurement.

Lesson 2
Calipers 

Use a vernier scale.

Use a caliper to take
measurements.

Explain the pros and cons of
vernier, dial, and digital calipers.

Lesson 3
Micrometers

 Use a micrometer to take measurements.
 Read precision micrometer scales.
 Identify applications for inside and outside micrometers.

Lesson 4
Height & Depth
Gages

 Use height gages with a surface plate to take direct or comparative
measurements.
 Identify height gage accessories used for specialty measuring
applications.
 Use depth gages to measure the depth of features.

Lesson 5
Fixed Gages 
 Explain the pros and cons of fixed and variable gages.
 Identify measurement applications for fixed gages.

Lesson 6
Test Indicators &
Dial Indicators

 Use both test indicators and dial/digital indicator for comparative
length measurements.
 Select indicator contact points types and test stands to specific
measurement applications.

Lesson 7
Gage
Blocks & Surface Plates 
 Wring and stack gage blocks.
 Use gage blocks to calibrate variable gages, check the validity of
fixed limit ages, and to set comparativelength indicators.
 Use gage blocks with surface plates to make comparative
measurements.

Unit Test
Challenge

An assessment of the learner’s progress in this unit. 
Unit 3  Gaging Applications

Lesson 1
Application
Overview 

Understand that some
dimensional instruments are appropriate and some are not for a specific
measuring application.

Realize that there are common
errors and misapplications in measuring and that they can be avoided.

Lesson 2
Linear Measurements 

Select the appropriate type
of gages for common linear measurement applications.

Measure the position of a
hole.

Measure the differential
height between two lands.

Lesson 3
Roundness & Circularity

 Use twopoint contact gages to measure outofroundness.
 Recognize limitations of twopoint contact gages for shapes that are
oval, eggshaped, irregular or lobed.
 Be exposed to threepoint contact gages and sophisticated gages to
measure outofroundness.

Lesson 4
Common
Misapplications

 12 common measuring mistakes and misapplications.
 What to look out for and how to prevent these mistakes from
happening.

Lesson 5
Measuring Complications 
 10 systemic problems that can lead to measuring complications.
 An exploration of why each complication may occur with suggested
remedies to combat the complication and make the system more robust.

Lesson 6
Care of Gages 
 Apply universal practices to take care of gages.
 Review tips for cleaning and caring for specific instruments.

Unit Test
Challenge

An assessment of the learner’s progress in this unit. 