Nelson Higher Education

Higher Education

Interpreting Engineering Drawings, 6th Edition

  • Cecil H. Jensen
  • Dr. Jay D. Helsel
  • Ed Espin
  • ISBN-10: 0176501703
  • ISBN-13: 9780176501709
  • 0 Pages | Paperback
  • Previous Editions: 2007, 2007, 2002
  • COPYRIGHT: 2012 Published
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About the Product

The 6th Canadian edition of Jensen’s Interpreting Engineering Drawings is aimed at students in mechanical apprenticeship programs, including Machinists, Tool and Die Makers, and Industrial Millwrights – who need to understand the basic – and more complex – concepts involved in technical drawings and the communication of technical information. Jensen is the only blueprint reading text on the market designed to provide customized drawing interpretation courses for each and every student. Designed to contain far more information than is normally required for any traditional program, this text provides the instructor with the opportunity of selecting units of instruction that would best suit the needs of the students in that particular area or industry. It provides the theory and practical application for individuals to develop the intellectual skills needed to communicate technical concepts used throughout the international marketplace. The first chapters cover the core concepts of blueprint reading from orthographic views to section views. The second and third sections include topics of different fields of mechanical drafting such as structural steel, welding, piping, and GDT. Jensen is the only text on the market that follows CSA standards.


  • The entire text is developed around the latest drafting standards accepted throughout industry.

  • Tables are provided to summarize useful data for future reference.

  • This text covers both imperial and metric measurements. Both systems are introduced early in the text and are reinforced in both theory and practical applications through the assignments at the end of each unit.

  • Similar topics are organized into discrete units of moderate length and are followed by immediate application by way of assignments.

  • Numerous examples and illustrations are provided to show the applications of each concept described. Color is used extensively in the text to draw attention to important concepts and changes of state from one part or location to another.

About the Author

Cecil H. Jensen

Cecil H. Jensen took an early retirement from teaching to devote his full time to technical writing. He held the position of Technical Director at the McLaughlin Collegiate and Vocational Institute, Oshawa, Ontario, Canada, and has more than twenty-seven years of teaching experience in mechanical drafting. He was an active member of the Canadian Standards Association (CSA) Committee on Technical Drawings. Mr. Jensen has represented Canada at international (ISO) conferences on engineering drawing standards, which took place in Oslo, Norway and Paris, France. He also represented Canada on the ANSI Y14.5M Committee on Dimensioning and Tolerancing. He is the successful author of numerous texts including Engineering Drawing and Design, Fundamentals of Engineering Drawing, Geometric Dimensioning and Tolerancing for Engineering and Manufacturing Technology, Computer-Aided Engineering Drawing, and Home Planning and Design. Before he began teaching, Mr. Jensen spent several years in industrial design. He also supervised the evening courses in Oshawa and was responsible for teaching selected courses for General Motors Corporation apprentices.

Dr. Jay D. Helsel

Jay D. Helsel has worked more than 35 years in education, having served as a professor of applied engineering and technology courses, chairperson of the Department of Applied Engineering and Technology, and Vice President for Administration and Finance at California University of Pennsylvania. Dr. Helsel has had extensive experience teaching mechanical drafting at both the secondary and post-secondary levels and has worked in industry as well. He holds an undergraduate degree from California University of Pennsylvania, a master's degree from the Pennsylvania State University, and a doctoral degree from the University of Pittsburgh. Dr. Helsel is now a full-time writer and has authored publications such as Engineering Drawing and Design, Fundamentals of Engineering Drawing, Programmed Blueprint Reading, Computer-Aided Engineering Drawing, and Mechanical Drawing: Board and CAD Techniques, as well as various workbooks and other ancillary products associated with the above publications.

Ed Espin

Ed Espin is an instructor at Humber College in Toronto, Ontario and has more than twenty years of teaching experience in mechanical drafting. Several of his students have received awards in the Ontario and Canada Skills competitions. He has also been responsible for teaching selected courses to different companies and groups in the Toronto metropolitan area. To maintain his mechanical and drafting skills, he is often engaged in industrial assignments and special projects for different companies.

Table of Contents

Part One: Basic mechanical drafting
Unit 1: Bases for interpreting drawings; Line styles and Lettering; Sketching
Unit 2: Lines used to describe the shape of a part; Title blocks and title strips; Drawing to scale
Unit 3: Circular features; Centre lines; Sketching circles and arcs
Unit 4: Working drawings; Arrangement of Views; Third-Angle Projections
Unit 5: Dimensioning
Unit 6: Inclined surfaces; Measurement of angles; Symmetrical outlines; Machine slots
Unit 7: Machining Symbols
Unit 8: Sectional Views
Unit 9: Chamfers; Undercuts; Tapers; Knurls
Unit 10: Selection of views; One-and two-view drawings; Multiple-detail drawings; Functional drafting
Unit 11: Alignment of parts and holes; Partial views; Naming of views for spark adjuster; Drill sizes
Unit 12: Broken out and partial sections; Webs in section; Ribs in section; Spokes in section
Unit 13: Revolved and removed sections
Unit 14: Assembly drawings; Subassembly drawings; Identifying parts of an assembly drawing; Bill of material (BOM); Helical spring
Unit 15: Oblique surfaces
Unit 16:Primary auxiliary views
Unit 17: Secondary auxiliary views
Unit 18:Arrangement of views

Part Two: Mechanical drafting applications
Unit 19: Tolerances and allowances; Tolerancing methods
Unit 20: Inch Fits; Description of fits; Standard Inch fits
Unit 21: Metric fits
Unit 22: Surface Texture
Unit 23: Threaded fasteners; Threaded assemblies; Threaded holes; Inch thread designation; Right-and Left- handed threads; Metric threads; Metric threads designation
Unit 24: Pin fasteners; Section Through shafts, pins and keys
Unit 25: Keys; Dimensioning of keyways and keyseats; Set screws; Flats; Bosses and pads; Dimension origin symbol; Rectangular Coordinate dimensioning without dimension lines; Rectangular Coordinate dimensioning in tabular form
Unit 26: Welding drawings; Welding symbols; Fillet welds
Unit 27: Groove welds; Supplementary Symbols
Unit 28: Structural steel shapes; Phantom outlines; Conical Washer
Unit 29: Gears; Spur Gears
Unit 30: Bevel Gears
Unit 31: Gear trains
Unit 32: Cams; Types of cams
Unit 33: Ratchet Wheels
Unit 34: Bearings; Plain Bearings
Unit 35: Antifriction bearings; Retaining Rings; O-ring seals; Clutches; Belt drives
Unit 36: Manufacturing Materials; Cast Irons; Steel; SAE and AISI systems of steel Identification; Structural steel; Plastics; Rubber
Unit 37: Casting processes; Casting design; Core castings; Machining lugs; Surfaces coatings
Unit 38: Development drawings; Joints, seams, and edges; Sheet metal sizes; Straight line development; Stampings
Unit 39: Piping; Piping drawing symbols
Unit 40: Chain dimensioning; Base line (Datum) Dimensioning

Part Three: Modern engineering tolerancing
Unit 41: Modern Engineering Tolerancing; Geometric Tolerancint; Feature Control Frame; Form Tolerances; Straightness; Straightness Controlling Surface Elements
Unit 42: Straightness of a Feature of Size; Feature of Size Definitions; Material Condition Symbols; Maximum Material Conditions; Regardless of Feature Size; Least Material Condition; Straightness of a Feature of Size
Unit 43: Form Tolerances; Flatness; Circularity; Cylindricity
Unit 44: Datums and the Three-Plane Concept; Datums for Geometric Tolerancing; Three-Plan System; Uneven Surfaces; Datum Feature Symbol
Unit 45: Orientation Tolerances; Orientation Tolerancing for Flat Surfaces
Unit 46: Orientation Tolerancing for Features of Size; Internal Cylindrical Features; Perpendicularity; External Cylindrical Features
Unit 47: Datum Targets; Datum-Target Symbol
Unit 48: Tolerancing of Features by Position; Tolerancing Methods; Coordinating Tolerancing; Positional Tolerancing; Materian Condition Basis; Positional Tolerancing for Circular Features
Unit 49: Selection of Datum Features for Positional Tolerancing; Long Holes; Circular Datums; Multiple Hole Datums
Unit 50: Profile Tolerances; Profile of a Line; Surface Profile
Unit 51: Runout Tolerances; Circular Runout; Total Runout; Establishing Datums
Unit 52: Drawings for Numerical Control
Unit 53: Other Basic Welds

New to this edition

  • Standards update: All drawings in the text have been updated to conform to the latest CSA and ASME drawing standards.
  • Increased coverage of geometric tolerancing.
  • Expanded sketching practice: the use of sketching techniques as a means of better understanding and communicating technical information has been greatly expanded throughout this text. This becomes increasingly more important as computer-aided drafting continues to rapidly replace board drafting.
  • Enriched Instructor’s Manual includes the Nelson Instructor’s Guide to Classroom Engagement, providing instructors with an overview of the theory and models of active learning. As well, each chapter in the new Instructor’s Manual covers learning objectives, teaching tips to overcome barriers, some 3-D representations of projects for instructors to assist the students in visualizing the part(s) in a more realistic representation than in their traditional orthographic layouts, sample tests, and the solutions to assignments.
  • Computerized Test Bank Nelson Education Ltd. understands that a good quality multiple-choice test bank can provide the means to measure higher-level thinking skills as well as recall. Recognizing the importance of multiple-choice testing in today's classroom, we have created the Nelson Education Testing Advantage program (NETA) to ensure the value of our high quality test banks. The new NETA test bank has been enhanced with more multiple-choice questions and better formulated questions!


All supplements have been updated in coordination with the Main title.
Please see Main title page for new to this edition information.

Instructor Supplements

Instructor's Resource CD for Interpreting Engineering Drawings  (ISBN-10: 0176474447 | ISBN-13: 9780176474447)