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Gage Mentor (Dimensional Gages) Course Outline -- 3 Units

Unit 1 - Gage Primer
Lesson 1: Why Measure?
·          The importance of measuring in today's manufacturing world.
·          The 5 critical aspects of measuring.
Lesson 2: Language of Measurement
·          Key terms you need to know in order to speak the language of dimensional metrology.
Lesson 3: Measurement Standards
·          The role of standards.
·          Types of standards related to dimensional metrology including units of measure, dimensioning & tolerancing practices, laboratory practices, calibration standards, and documentation.
Lesson 4: Precision & Accuracy
·          Key measurement concepts that serve as the foundation of a good measurement system.
·          The 5 components of any measurement system.
·          How variation in any component can lead to measurement error.
Lesson 5: Datums
·          How measurements are referenced by design and manufacturing engineers on drawings.
·          Datums, datum feature symbols, datum features, simulated datums, and target datums.
·          The use of primary, secondary, and tertiary datums.
Lesson 6: Introduction to GD&T
·          Comparison of coordinate tolerancing and GD&T techniques.
·          How to read drawing symbols used with GD&T.
·          The 14 GD&T geometric characteristics.
·          The use of modifiers.
Lesson 7: Surface Finishes
·          An overview of measurements used to characterize the finish of a surface.
·          How to interpret lay and surface symbols.
Lesson 8: Math for Measuring
·          A basic review of simple mathematical concepts such as converting fractions and working with decimals.
·          Basic geometry concepts.
Challenge: An assessment of the learner’s progress in this unit.

Unit 2 - Using Gages
Lesson 1: Types of Gages
·          A review of universal dimensional measurement techniques.
·          An introduction of the gages to be explored in this Unit.
·          A brief overview of specialty measurement devices.
Lesson 2: Calipers
·          How to use and read vernier scales.
·          How to use a caliper.
·          The pros and cons of vernier scale, dial, and digital calipers.
Lesson 3: Micrometers
·          The size vs. range of a micrometer.
·          How to read micrometer scales.
·          How to use outside and inside micrometers.
·          Discrimination vs. accuracy of digital micrometers.
Lesson 4: Height & Depth Gages
·          How to use a height gage for direct and comparative height measurements.
·          How gage blocks and height masters are used with height gages.
·          Potential problems with height gages.
·          How to use depth gages.
·          Potential problems with depth gages.
Lesson 5: Fixed Gages
·          Explanations of the different types of fixed limit and GO/NOGO gages.
·          Advantages and disadvantages of fixed gages and variable gages.
·          Hints for using each type of fixed gage covered.
Lesson 6: Test Indicators & Dial Indicator
·          The differences between the features and capabilities of test indicators and dial indicators.
·          How to use test indicators with adjustable arm test sets for comparative length measurements.
·          How to use dial indicators with comparator stands for comparative length measurements.
·          Potential problems with indicators.
Lesson 7: Gage Blocks & Surface Plates
·          Gage block and surface plate standards and grades.
·          The use of gage blocks and surface plates.
·          How to wring gage blocks.
·          How to calculate combination stacks of gage blocks.
·          Basic care points for gage blocks and surface plates.
Challenge: An assessment of the learner’s progress in this unit.

Unit 3 - Gaging Applications
Lesson 1: Application Overview.
·          On overview of the dimensional measuring applications covered.
Lesson 2: Linear Measurements
·          An exploration of which linear gage to use for a wide spectrum of specific measuring applications.
·          Exercises looking at which gages are acceptable (and unacceptable) to use for measuring part features such as OD, ID, slot width, slot depth, differential height, and hole position.
Lesson 3: Roundness & Circularity
·          How to take out-of-roundness measurements.
·          Problems with measuring roundness and the OD with two-point contact gages.
·          How to gage the effective diameter.
·          How to select and use three-point contact devices for roundness and OD measurements.
·          How to measure cylindricity.
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 it and make the measurement system more robust.
Lesson 6: Care of Gages
·          Universal care points that apply to all gages and instruments.
·          Specific hints to ensure the proper care of specific gage families including surface plates, gage blocks, micrometers, calipers, height and depth gages, fixed gages, and indicators..
Challenge: An assessment of the learner’s progress in this unit.