DRF 128 - Geometric Tolerancing

Credits: 2
Instructional Contact Hours: 3

Explains the principles and methods of geometric dimensioning and tolerancing using the current ASME/ANSI 14.5 standard. Introduces the science of precision measurement, focusing on accuracy and application as well as problem solving as it relates to dimensional metrology. Includes topics of measurement processes and feasibility, industry standards, and operation of measurement equipment including the Coordinate Measuring Machine. Credit may be earned in either DRF 128 or SKDR 128 but not both.

Prerequisite(s): DRF 121 (or SKDR 101) or permission of instructor
Corequisite(s): None
Lecture Hours: 30 Lab Hours: 15
Meets MTA Requirement: None
Pass/NoCredit: No

Outcomes and Objectives 1. Correctly interpret the symbols of geometric dimensioning as it relates to the latest standard.

Describe the current GD&T terms and symbols.
Lists the basic rules of geometric dimensioning.
Describes how feature control frames (symbols) are displayed on industrial prints
Identify and define datums.
Explain and interpret both standard and geometrically dimensioned tolerances.
Explain where to place symbols on a print.
Translate drawing notes into GD&T symbols.
Translate standard drawing dimensions and tolerances into GD&T symbols and tolerances.
Translate GD&T symbols into drawing notes.
Translate GD&T symbols and tolerances into standard drawing dimensions and tolerances.
Discuss the advantage of GD&T symbols over notes.

2. Explain the fundamentals of a Measurement System

Test and inspect commodities.
Explain the evolution of measurement equipment.
Identify and describe the uses of measurement.
Define accuracy, precision, and reliability.
List the primary sources of error in measurement.
Control potential sources of measurement error.

3. Demonstrate knowledge of Specialized Measuring Tools

Identify and use different types of measurement equipment which may include micrometers, calipers, dial gages, telescope gages, gage blocks, Coordinate Measurement Machine, Optical Comparator, etc.
Complete the measurement of features using different types of measurement equipment which may include micrometers, calipers, dial gages, telescope gages, gage blocks, Coordinate Measurement Machine, Optical Comparator, etc.
Perform and record surface finish measurements.
Explore and practice using common gages.
Perform gage setup, alignment, calibration and maintenance.
Explain CAD and volumetric measurements trends.
Explore computer and gauging unions.
Measure with features to an accuracy of .001”.
Correctly use and care for gage block sets.
Complete the inspection of geometric tolerances, dimensional tolerances, and positional dimensions.