Engineering Drawings Primer

Course Summary

This course focuses on the basic requirements of engineering drawings, numeric dimensions and tolerances, and geometric dimensions and tolerances.

Event Details

8:00am–4:00pm (EST) each day ON-SITE
9:00am–12:30pm (EST) each day VIRTUAL
Customer site: times vary

8 hours: 1 in-person session or 2 virtual sessions
Instructor-led classroom training, in-person and in-groups, with lots of discussion and working sessions to practice learned skills.
Available at QSG’s training facilities, virtually, or on-site at your organization

TextbookHammer’s Blueprint Reading Basics, 4th ed., by Charles Gillis, Industrial Press

WorkbookEngineering Drawings Primer Workbook, by Charles Gillis


Intended for the professional or manager seeking an awareness of dimensioning and tolerancing who does not need to further their knowledge with a more in-depth course. Designed to provide you with an understanding of GD&T fundamentals, this course focuses on the basic requirements of engineering drawings, numeric dimensions and tolerances, and geometric dimensions and tolerances.

Who Should Attend

This course is designed for engineering managers and supervisors, mechanical engineering technicians, manufacturing engineering technicians, quality assurance technicians, and supplier quality engineers.

Learning Objectives

Through training, participants will learn the following:

  • Calculate minimum and maximum allowable values for dimensions considering numeric tolerances.
  • Learn how geometric tolerances supplement conventional tolerances to specify limits on allowable variation.
  • Recognize the symbols used with the geometric system of tolerances.
  • Recognize basic dimensions on prints and understand their meaning.
  • Identify and properly read feature control frames.
  • Recognize when bonus tolerance is available and calculate geometric tolerance values when bonus tolerance applies.
  • Recognize datum feature identifiers applied to features with size and surfaces.
  • Analyze the datum reference frame including order of precedence.
  • Identify and read geometric controls on location, orientation, form, profile & runout.

Course Outline

The Basics of Manufacturing Prints
What manufacturing prints are and why they are used
Who uses them and how
The manufacturing cycle and purpose of prints
The basic requirements of technical drawings
Prints are interpreted according to standards and represent contractual requirements

What dimensions are and why they are important
Fundamental dimensioning and tolerancing rules
Symbols associated with dimensions
Linear, diametral, radial, and angular dimensions
Dimensioning of common features

Numeric Tolerances
What tolerances are and why they are important
The ways numeric tolerances are indicated on prints
Determining tolerance values for numeric tolerances given implicitly, explicitly, symbolically, and by limit dimensioning
Calculating tolerance accumulations

Geometric Tolerance Fundamentals
How geometric tolerances work
Thinking of parts as collections of features not dimensions
Features with size and surfaces
Maximum Material Condition and Least Material Condition
What bonus tolerance is and when it applies

The Datum Reference Frame Concept
The purpose of a datum reference frame
Establishing datums from various datum features
What datum shift is and when it applies

Interpretation of Geometric Controls
The geometric characteristic symbols used to impose geometric requirements




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