Gage Training

Outline
Show Course Objectives

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 learnerís 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 10-times 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 comparative-length indicators.
  • Use gage blocks with surface plates to make comparative measurements.

Unit Test

Challenge

An assessment of the learnerís 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 two-point contact gages to measure out-of-roundness.
  • Recognize limitations of two-point contact gages for shapes that are oval, egg-shaped, irregular or lobed.
  • Be exposed to three-point contact gages and sophisticated gages to measure out-of-roundness.
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 learnerís progress in this unit.